FFmpeg/Changelog

Entries are sorted chronologically from oldest to youngest within each release,
releases are sorted from youngest to oldest.

version 2.8.11
- avcodec/h264_slice: Clear ref_counts on redundant slices
- lavf/mov.c: Avoid heap allocation wrap in mov_read_uuid
- lavf/mov.c: Avoid heap allocation wrap in mov_read_hdlr
- avcodec/pictordec: Fix logic error
- avcodec/movtextdec: Fix decode_styl() cleanup
- lavf/matroskadec: fix is_keyframe for early Blocks
- configure: bump year
- avcodec/pngdec: Check trns more completely
- avcodec/interplayvideo: Move parameter change check up
- avcodec/mjpegdec: Check for for the bitstream end in mjpeg_decode_scan_progressive_ac()
- avformat/flacdec: Check avio_read result when reading flac block header.
- avcodec/utils: correct align value for interplay
- avcodec/vp56: Check for the bitstream end, pass error codes on
- avcodec/mjpegdec: Check remaining bitstream in ljpeg_decode_yuv_scan()
- avcodec/pngdec: Fix off by 1 size in decode_zbuf()
- avformat/avidec: skip odml master index chunks in avi_sync
- avcodec/mjpegdec: Check for rgb before flipping
- avutil/random_seed: Reduce the time needed on systems with very low precision clock()
- avutil/random_seed: Improve get_generic_seed() with higher precision clock()
- avformat/utils: Print verbose error message if stream count exceeds max_streams
- avformat/options_table: Set the default maximum number of streams to 1000
- avutil: Add av_image_check_size2()
- avformat: Add max_streams option
- avcodec/ffv1enc: Allocate smaller packet if the worst case size cannot be allocated
- avcodec/mpeg4videodec: Fix undefined shifts in mpeg4_decode_sprite_trajectory()
- avformat/oggdec: Skip streams in duration correction that did not had their duration set.
- avcodec/ffv1enc: Fix size of first slice
- pgssubdec: reset rle_data_len/rle_remaining_len on allocation error

version 2.8.10
- avformat/http: Match chunksize checks to master..3.0
- Changelog: fix typos
- ffserver: Check chunk size
- Avoid using the term "file" and prefer "url" in some docs and comments
- avformat/rtmppkt: Check for packet size mismatches
- zmqsend: Initialize ret to 0
- configure: check for strtoull on msvc
- http: move chunk handling from http_read_stream() to http_buf_read().
- http: make length/offset-related variables unsigned.

version 2.8.9
- avcodec/flacdec: Fix undefined shift in decode_subframe()
- avcodec/get_bits: Fix get_sbits_long(0)
- avformat/ffmdec: Check media type for chunks
- avcodec/flacdec: Fix signed integer overflow in decode_subframe_fixed()
- avcodec/flacdsp_template: Fix undefined shift in flac_decorrelate_indep_c
- avformat/oggparsespeex: Check frames_per_packet and packet_size
- avformat/utils: Check start/end before computing duration in update_stream_timings()
- avcodec/flac_parser: Update nb_headers_buffered
- avformat/idroqdec: Check chunk_size for being too large
- filmstripdec: correctly check image dimensions
- mss2: only use error correction for matching block counts
- softfloat: decrease MIN_EXP to cover full float range
- libopusdec: default to stereo for invalid number of channels
- sbgdec: prevent NULL pointer access
- smacker: limit recursion depth of smacker_decode_bigtree
- mxfdec: fix NULL pointer dereference in mxf_read_packet_old
- libschroedingerdec: fix leaking of framewithpts
- libschroedingerdec: don't produce empty frames
- softfloat: handle -INT_MAX correctly
- pnmdec: make sure v is capped by maxval
- smvjpegdec: make sure cur_frame is not negative
- icodec: correctly check avio_read return value
- icodec: fix leaking pkt on error
- dvbsubdec: fix division by zero in compute_default_clut
- proresdec_lgpl: explicitly check coff[3] against slice_data_size
- escape124: reject codebook size 0
- mpegts: prevent division by zero
- matroskadec: fix NULL pointer dereference in webm_dash_manifest_read_header
- mpegaudio_parser: don't return AVERROR_PATCHWELCOME
- mxfdec: fix NULL pointer dereference
- diracdec: check return code of get_buffer_with_edge
- ppc: pixblockdsp: do unaligned block accesses correctly again
- mpeg12dec: unref discarded picture from extradata
- cavsdec: unref frame before referencing again
- avformat: prevent triggering request_probe assert in ff_read_packet
- avformat/mpeg: Adjust vid probe threshold to correct mis-detection
- avcodec/rv40: Test remaining space in loop of get_dimension()
- avcodec/ituh263dec: Avoid spending a long time in slice sync
- avcodec/movtextdec: Add error message for tsmb_size check
- avcodec/movtextdec: Fix tsmb_size check==0 check
- avcodec/movtextdec: Fix potential integer overflow
- avcodec/sunrast: Fix input buffer pointer check
- avcodec/tscc:  Check side data size before use
- avcodec/rawdec: Check side data size before use
- avcodec/msvideo1: Check side data size before use
- avcodec/qpeg:  Check side data size before use
- avcodec/qtrle:  Check side data size before use
- avcodec/msrle:  Check side data size before use
- avcodec/kmvc:  Check side data size before use
- avcodec/idcinvideo: Check side data size before use
- avcodec/cinepak: Check side data size before use
- avcodec/8bps: Check side data size before use
- avcodec/dvdsubdec: Fix off by 1 error
- avcodec/dvdsubdec: Fix buf_size check
- vp9: change order of operations in adapt_prob().
- avcodec/interplayvideo: Check side data size before use
- avformat/mxfdec: Check size to avoid integer overflow in mxf_read_utf16_string()
- avcodec/mpegvideo_enc: Clear mmx state in ff_mpv_reallocate_putbitbuffer()
- avcodec/utils: Clear MMX state before returning from avcodec_default_execute*()
- cmdutils: fix typos
- lavfi: fix typos
- lavc: fix typos
- tools: fix grammar error
- avutil/mips/generic_macros_msa: rename macro variable which causes segfault for mips r6
- videodsp: fix 1-byte overread in top/bottom READ_NUM_BYTES iterations.
- avformat/avidec: Check nb_streams in read_gab2_sub()
- avformat/avidec: Remove ancient assert
- lavc/movtextdec.c: Avoid infinite loop on invalid data.
- avcodec/ansi: Check dimensions
- avcodec/cavsdsp: use av_clip_uint8() for idct

version 2.8.8
- avformat/movenc: Check packet in mov_write_single_packet() too
- avformat/movenc: Factor check_pkt() out
- avformat/utils: fix timebase error in avformat_seek_file()
- avcodec/g726: Add missing ADDB output mask
- avcodec/avpacket: clear side_data_elems
- avcodec/ccaption_dec: Use simple array instead of AVBuffer
- swscale/swscale_unscaled: Try to fix Rgb16ToPlanarRgb16Wrapper() with slices
- swscale/swscale_unscaled: Fix packed_16bpc_bswap() with slices
- avformat/avidec: Fix infinite loop in avi_read_nikon()
- cmdutils: fix implicit declaration of SetDllDirectory function
- cmdutils: check for SetDllDirectory() availability
- avcodec/aacenc: Tighter input checks
- libavcodec/wmalosslessdec: Check the remaining bits
- avcodec/diracdec: Check numx/y
- avcodec/indeo2: check ctab
- avformat/swfdec: Fix inflate() error code check
- avcodec/h264: Put context_count check back
- cmdutils: remove the current working directory from the DLL search path on win32
- avcodec/raw: Fix decoding of ilacetest.mov
- avcodec/ffv1enc: Fix assertion failure with non zero bits per sample
- avformat/oggdec: Fix integer overflow with invalid pts
- ffplay: Fix invalid array index
- avcodec/vp9_parser: Check the input frame sizes for being consistent
- libavformat/rtpdec_asf: zero initialize the AVIOContext struct
- libavutil/opt: Small bugfix in example.
- libx264: Increase x264 opts character limit to 4096
- avformat/mov: Check sample size
- avformat/format: Fix registering a format more than once and related races
- avcodec/flac_parser: Raise threshold for detecting invalid data
- avfilter/vf_telecine: Make frame writable before writing into it
- avcodec/mpc8: Correct end truncation
- avcodec/mpegvideo: Do not clear the parse context during init
- MAINTAINERs cleanup (remove myself from things i de facto do not maintain)
- avcodec/h264: Fix off by 1 context count
- avcodec/alsdec: Check r to prevent out of array read
- avcodec/alsdec: fix max bits in ltp prefix code
- avcodec/utils: check skip_samples signedness
- avformat/mpegts: Do not trust BSSD descriptor, it is sometimes not an S302M stream
- avcodec/bmp_parser: Check fsize
- avcodec/bmp_parser: reset state
- avcodec/bmp_parser: Fix remaining size
- avcodec/bmp_parser: Fix frame_start_found in cross frame cases
- avfilter/af_amix: do not fail if there are no samples in output_frame()
- avformat/allformats: Making av_register_all() thread-safe.
- avcodec/mpegvideo: Deallocate last/next picture earlier
- avcodec/bmp_parser: Fix state
- avformat/oggparseopus: Fix Undefined behavior in oggparseopus.c and libavformat/utils.c
- doc/developer.texi: Add a code of conduct
- avformat/avidec: Detect index with too short entries
- avformat/utils: Check negative bps before shifting in ff_get_pcm_codec_id()
- avformat/utils: Do not compute the bitrate from duration == 0
- ffmpeg: Check that r_frame_rate is set before attempting to use it
- swresample/rematrix: Use clipping s16 rematrixing if overflows are possible
- swresample/rematrix: Use error diffusion to avoid error in the DC component of the matrix
- libavformat/oggdec: Free stream private when header parsing fails.
- avformat/utils: Check bps before using it in a shift in ff_get_pcm_codec_id()
- avformat/oggparseopus: Check that granule pos is within the supported range
- avcodec/mjpegdec: Do not try to detect last scan but apply idct after all scans for progressive jpeg
- avformat/options_table: Add missing identifier for very strict compliance
- librtmp: Avoid an infiniloop setting connection arguments
- avformat/oggparsevp8: fix pts calculation on pages ending with an invisible frame


version 2.8.7
- avcodec/motion_est: Attempt to fix "short data segment overflowed" on IA64
- avformat/ffmdec: Check pix_fmt
- avcodec/ttaenc: Reallocate packet if its too small
- pgssubdec: fix subpicture output colorspace and range
- avcodec/ac3dec: Reset SPX when switching from EAC3 to AC3
- avfilter/vf_drawtext: Check return code of load_glyph()
- avcodec/takdec: add code that got somehow lost in process of REing
- avcodec/apedec: fix decoding of stereo files with one channel full of silence
- avcodec/avpacket: Fix off by 5 error
- avcodec/h264: Fix for H.264 configuration parsing
- avcodec/bmp_parser: Ensure remaining_size is not too small in startcode packet crossing corner case
- avfilter/src_movie: fix how we check for overflows with seek_point
- avcodec/j2kenc: Add attribution to OpenJPEG project:
- avcodec/h264_slice: Check PPS more extensively when its not copied
- avcodec/libutvideodec: copy frame so it has reference counters when refcounted_frames is set
- avformat/rtpdec_jpeg: fix low contrast image on low quality setting
- avcodec/mjpegenc_common: Store approximate aspect if exact cannot be stored
- lavc/hevc: Allow arbitrary garbage in bytestream as long as at least one NAL unit is found.
- avcodec/resample: Remove disabled and faulty code
- indeo2: Fix banding artefacts
- indeo2data: K&R formatting cosmetics
- avcodec/imgconvert: Support non-planar colorspaces while padding
- avutil/random_seed: Add the runtime in cycles of the main loop to the entropy pool
- avutil/channel_layout: AV_CH_LAYOUT_6POINT1_BACK not reachable in parsing
- avformat/concatdec: set safe mode to enabled instead of auto
- avformat/utils: fix dts from pts code in compute_pkt_fields() during ascending delay
- avformat/rtpenc: Fix integer overflow in NTP_TO_RTP_FORMAT
- avformat/cache: Fix memleak of tree entries
- lavf/mov: downgrade sidx errors to non-fatal warnings; fixes trac #5216 (cherry picked from commit 22dbc1caaf13e4bb17c9e0164a5b1ccaf490e428)
- lavf/mov: fix sidx with edit lists (cherry picked from commit 3617e69d50dd9dd07b5011dfb9477a9d1a630354)
- avcodec/mjpegdec: Fix decoding slightly odd progressive jpeg
- libwebpenc_animencoder: print library messages in verbose log levels
- libwebpenc_animencoder: zero initialize the WebPAnimEncoderOptions struct
- doc/utils: fix typo for min() description
- avcodec/avpacket: clear priv in av_init_packet()
- swscale/utils: Fix chrSrcHSubSample for GBRAP16
- swscale/input: Fix GBRAP16 input
- postproc: fix unaligned access
- avutil/pixdesc: Make get_color_type() aware of CIE XYZ formats
- avcodec/h264: Execute error concealment before marking the frame as done.
- swscale/x86/output: Fix yuv2planeX_16* with unaligned destination
- swscale/x86/output: Move code into yuv2planeX_mainloop
- avutil/frame: Free destination qp_table_buf in frame_copy_props()


version 2.8.6
- avcodec/jpeg2000dec: More completely check cdef
- avutil/opt: check for and handle errors in av_opt_set_dict2()
- avcodec/flacenc: fix calculation of bits required in case of custom sample rate
- avformat: Document urls a bit
- avformat/libquvi: Set default demuxer and protocol limitations
- avformat/concat: Check protocol prefix
- doc/demuxers: Document enable_drefs and use_absolute_path
- avcodec/mjpegdec: Check for end for both bytes in unescaping
- avcodec/mpegvideo_enc: Check for integer overflow in ff_mpv_reallocate_putbitbuffer()
- avformat/avformat: Replace some references to filenames by urls
- avcodec/wmaenc: Check ff_wma_init() for failure
- avcodec/mpeg12enc: Move high resolution thread check to before initializing threads
- avformat/img2dec: Use AVOpenCallback
- avformat/avio: Limit url option parsing to the documented cases
- avformat/img2dec: do not interpret the filename by default if a IO context has been opened
- avcodec/ass_split: Fix null pointer dereference in ff_ass_style_get()
- mov: Add an option to toggle dref opening
- avcodec/gif: Fix lzw buffer size
- avcodec/put_bits: Assert buf_ptr in flush_put_bits()
- avcodec/tiff: Check subsample & rps values more completely
- swscale/swscale: Add some sanity checks for srcSlice* parameters
- swscale/x86/rgb2rgb_template: Fix planar2x() for short width
- swscale/swscale_unscaled: Fix odd height inputs for bayer_to_yv12_wrapper()
- swscale/swscale_unscaled: Fix odd height inputs for bayer_to_rgb24_wrapper()
- avcodec/aacenc: Check both channels for finiteness
- asfdec_o: check for too small size in asf_read_unknown
- asfdec_o: break if EOF is reached after asf_read_packet_header
- asfdec_o: make sure packet_size is non-zero before seeking
- asfdec_o: prevent overflow causing seekback
- asfdec_o: check avio_skip in asf_read_simple_index
- asfdec_o: reject size > INT64_MAX in asf_read_unknown
- asfdec_o: only set asf_pkt->data_size after sanity checks
- Merge commit '8375dc1dd101d51baa430f34c0bcadfa37873896'
- dca: fix misaligned access in avpriv_dca_convert_bitstream
- brstm: fix missing closing brace
- brstm: also allocate b->table in read_packet
- brstm: make sure an ADPC chunk was read for adpcm_thp
- vorbisdec: reject rangebits 0 with non-0 partitions
- vorbisdec: reject channel mapping with less than two channels
- ffmdec: reset packet_end in case of failure
- avformat/ipmovie: put video decoding_map_size into packet and use it in decoder
- avformat/brstm: fix overflow


version 2.8.5
- avformat/hls: Even stricter URL checks
- avformat/hls: More strict url checks
- avcodec/pngenc: Fix mixed up linesizes
- avcodec/pngenc: Replace memcpy by av_image_copy()
- swscale/vscale: Check that 2 tap filters are bilinear before using bilinear code
- swscale: Move VScalerContext into vscale.c
- swscale/utils: Detect and skip unneeded sws_setColorspaceDetails() calls
- swscale/yuv2rgb: Increase YUV2RGB table headroom
- swscale/yuv2rgb: Factor YUVRGB_TABLE_LUMA_HEADROOM out
- avformat/hls: forbid all protocols except http(s) & file
- avformat/aviobuf: Fix end check in put_str16()
- avformat/asfenc: Check pts
- avcodec/mpeg4video: Check time_incr
- avcodec/wavpackenc: Check the number of channels
- avcodec/wavpackenc: Headers are per channel
- avcodec/aacdec_template: Check id_map
- avcodec/dvdec: Fix "left shift of negative value -254"
- avcodec/g2meet: Check for ff_els_decode_bit() failure in epic_decode_run_length()
- avcodec/mjpegdec: Fix negative shift
- avcodec/mss2: Check for repeat overflow
- avformat: Add integer fps from 31 to 60 to get_std_framerate()
- avformat/ivfenc: fix division by zero
- avcodec/mpegvideo_enc: Clip bits_per_raw_sample within valid range
- avfilter/vf_scale: set proper out frame color range
- avcodec/motion_est: Fix mv_penalty table size
- avcodec/h264_slice: Fix integer overflow in implicit weight computation
- swscale/utils: Use normal bilinear scaler if fast cannot be used due to tiny dimensions
- avcodec/put_bits: Always check buffer end before writing
- mjpegdec: extend check for incompatible values of s->rgb and s->ls
- swscale/utils: Fix intermediate format for cascaded alpha downscaling
- avformat/mov: Update handbrake_version threshold for full mp3 parsing
- x86/float_dsp: zero extend offset from ff_scalarproduct_float_sse
- avfilter/vf_zoompan: do not free frame we pushed to lavfi
- nuv: sanitize negative fps rate
- nutdec: reject negative value_len in read_sm_data
- xwddec: prevent overflow of lsize * avctx->height
- nutdec: only copy the header if it exists
- exr: fix out of bounds read in get_code
- on2avc: limit number of bits to 30 in get_egolomb


version 2.8.4
- rawdec: only exempt BIT0 with need_copy from buffer sanity check
- mlvdec: check that index_entries exist
- avcodec/mpeg4videodec: also for empty partitioned slices
- avcodec/h264_refs: Fix long_idx check
- avcodec/h264_mc_template: prefetch list1 only if it is used in the MB
- avcodec/h264_slice: Simplify ref2frm indexing
- avfilter/vf_mpdecimate: Add missing emms_c()
- sonic: make sure num_taps * channels is not larger than frame_size
- opus_silk: fix typo causing overflow in silk_stabilize_lsf
- ffm: reject invalid codec_id and codec_type
- golomb: always check for invalid UE golomb codes in get_ue_golomb
- sbr_qmf_analysis: sanitize input for 32-bit imdct
- sbrdsp_fixed: assert that input values are in the valid range
- aacsbr: ensure strictly monotone time borders
- aacenc: update max_sfb when num_swb changes
- aaccoder: prevent crash of anmr coder
- ffmdec: reject zero-sized chunks
- swscale/x86/rgb2rgb_template: Fallback to mmx in interleaveBytes() if the alignment is insufficient for SSE*
- swscale/x86/rgb2rgb_template: Do not crash on misaligend stride
- avformat/mxfenc: Do not crash if there is no packet in the first stream
- lavf/tee: fix side data double free.
- avformat/hlsenc: Check the return code of avformat_write_header()
- avformat/mov: Enable parser for mp3s by old HandBrake
- avformat/mxfenc: Fix integer overflow in length computation
- avformat/utils: estimate_timings_from_pts - increase retry counter, fixes invalid duration for ts files with hevc codec
- avformat/matroskaenc: Check codecdelay before use
- avutil/mathematics: Fix division by 0
- mjpegdec: consider chroma subsampling in size check
- libvpxenc: remove some unused ctrl id mappings
- avcodec/vp3: ensure header is parsed successfully before tables
- avcodec/jpeg2000dec: Check bpno in decode_cblk()
- avcodec/pgssubdec: Fix left shift of 255 by 24 places cannot be represented in type int
- swscale/utils: Fix for runtime error: left shift of negative value -1
- avcodec/hevc: Fix integer overflow of entry_point_offset
- avcodec/dirac_parser: Check that there is a previous PU before accessing it
- avcodec/dirac_parser: Add basic validity checks for next_pu_offset and prev_pu_offset
- avcodec/dirac_parser: Fix potential overflows in pointer checks
- avcodec/wmaprodec: Check bits per sample to be within the range not causing integer overflows
- avcodec/wmaprodec: Fix overflow of cutoff
- avformat/smacker: fix integer overflow with pts_inc
- avcodec/vp3: Fix "runtime error: left shift of negative value"
- avformat/riffdec: Initialize bitrate
- mpegencts: Fix overflow in cbr mode period calculations
- avutil/timecode: Fix fps check
- avutil/mathematics: return INT64_MIN (=AV_NOPTS_VALUE) from av_rescale_rnd() for overflows
- avcodec/apedec: Check length in long_filter_high_3800()
- avcodec/vp3: always set pix_fmt in theora_decode_header()
- avcodec/mpeg4videodec: Check available data before reading custom matrix
- avutil/mathematics: Do not treat INT64_MIN as positive in av_rescale_rnd
- avutil/integer: Fix av_mod_i() with negative dividend
- avformat/dump: Fix integer overflow in av_dump_format()
- avcodec/h264_refs: Check that long references match before use
- avcodec/utils: Clear dimensions in ff_get_buffer() on failure
- avcodec/utils: Use 64bit for aspect ratio calculation in avcodec_string()
- avcodec/hevc: Check max ctb addresses for WPP
- avcodec/vp3: Clear context on reinitialization failure
- avcodec/hevc: allocate entries unconditionally
- avcodec/hevc_cabac: Fix multiple integer overflows
- avcodec/jpeg2000dwt: Check ndeclevels before calling dwt_encode*()
- avcodec/jpeg2000dwt: Check ndeclevels before calling dwt_decode*()
- avcodec/hevc: Check entry_point_offsets
- lavf/rtpenc_jpeg: Less strict check for standard Huffman tables.
- avcodec/ffv1dec: Clear quant_table_count if its invalid
- avcodec/ffv1dec: Print an error if the quant table count is invalid
- doc/filters/drawtext: fix centering example


version 2.8.3
- avcodec/cabac: Check initial cabac decoder state
- avcodec/cabac_functions: Fix "left shift of negative value -31767"
- avcodec/h264_slice: Limit max_contexts when slice_context_count is initialized
- rtmpcrypt: Do the xtea decryption in little endian mode
- avformat/matroskadec: Check subtitle stream before dereferencing
- avcodec/pngdec: Replace assert by request for sample for unsupported TRNS cases
- avformat/utils: Do not init parser if probing is unfinished
- avcodec/jpeg2000dec: Fix potential integer overflow with tile dimensions
- avcodec/jpeg2000: Use av_image_check_size() in ff_jpeg2000_init_component()
- avcodec/wmaprodec: Check for overread in decode_packet()
- avcodec/smacker: Check that the data size is a multiple of a sample vector
- avcodec/takdec: Skip last p2 sample (which is unused)
- avcodec/dxtory: Fix input size check in dxtory_decode_v1_410()
- avcodec/dxtory: Fix input size check in dxtory_decode_v1_420()
- avcodec/error_resilience: avoid accessing previous or next frames tables beyond height
- avcodec/dpx: Move need_align to act per line
- avcodec/flashsv: Check size before updating it
- avcodec/ivi: Check image dimensions
- avcodec/utils: Better check for channels in av_get_audio_frame_duration()
- avcodec/jpeg2000dec: Check for duplicate SIZ marker
- aacsbr: don't call sbr_dequant twice without intermediate read_sbr_data
- hqx: correct type and size check of info_offset
- mxfdec: check edit_rate also for physical_track
- avcodec/jpeg2000: Change coord to 32bit to support larger than 32k width or height
- avcodec/jpeg2000dec: Check SIZ dimensions to be within the supported range
- avcodec/jpeg2000: Check comp coords to be within the supported size
- mpegvideo: clear overread in clear_context
- avcodec/avrndec: Use the AVFrame format instead of the context
- dds: disable palette flag for compressed images
- dds: validate compressed source buffer size
- dds: validate source buffer size before copying
- dvdsubdec: validate offset2 similar to offset1
- brstm: reject negative sample rate
- aacps: avoid division by zero in stereo_processing
- softfloat: assert when the argument of av_sqrt_sf is negative

version 2.8.2
- various fixes in the aac_fixed decoder
- various fixes in softfloat
- swresample/resample: increase precision for compensation
- lavf/mov: add support for sidx fragment indexes
- avformat/mxfenc: Only store user comment related tags when needed
- tests/fate/avformat: Fix fate-lavf
- doc/ffmpeg: Clarify that the sdp_file option requires an rtp output.
- ffmpeg: Don't try and write sdp info if none of the outputs had an rtp format.
- apng: use correct size for output buffer
- jvdec: avoid unsigned overflow in comparison
- avcodec/jpeg2000dec: Clip all tile coordinates
- avcodec/microdvddec: Check for string end in 'P' case
- avcodec/dirac_parser: Fix undefined memcpy() use
- avformat/xmv: Discard remainder of packet on error
- avformat/xmv: factor return check out of if/else
- avcodec/mpeg12dec: Do not call show_bits() with invalid bits
- avcodec/faxcompr: Add missing runs check in decode_uncompressed()
- libavutil/channel_layout: Check strtol*() for failure
- avformat/mpegts: Only start probing data streams within probe_packets
- avcodec/hevc_ps: Check chroma_format_idc
- avcodec/ffv1dec: Check for 0 quant tables
- avcodec/mjpegdec: Reinitialize IDCT on BPP changes
- avcodec/mjpegdec: Check index in ljpeg_decode_yuv_scan() before using it
- avutil/file_open: avoid file handle inheritance on Windows
- avcodec/h264_slice: Disable slice threads if there are multiple access units in a packet
- avformat/hls: update cookies on setcookie response
- opusdec: Don't run vector_fmul_scalar on zero length arrays
- avcodec/opusdec: Fix extra samples read index
- avcodec/ffv1: Initialize vlc_state on allocation
- avcodec/ffv1dec: update progress in case of broken pointer chains
- avcodec/ffv1dec: Clear slice coordinates if they are invalid or slice header decoding fails for other reasons
- rtsp: Allow $ as interleaved packet indicator before a complete response header
- videodsp: don't overread edges in vfix3 emu_edge.
- avformat/mp3dec: improve junk skipping heuristic
- concatdec: fix file_start_time calculation regression
- avcodec: loongson optimize h264dsp idct and loop filter with mmi
- avcodec/jpeg2000dec: Clear properties in jpeg2000_dec_cleanup() too
- avformat/hls: add support for EXT-X-MAP
- avformat/hls: fix segment selection regression on track changes of live streams
- configure: Require libkvazaar < 0.7.
- avcodec/vp8: Do not use num_coeff_partitions in thread/buffer setup


version 2.8.1:
- swscale: fix ticket #4881
- doc: fix spelling errors
- hls: only seek if there is an offset
- asfdec: add more checks for size left in asf packet buffer
- asfdec: alloc enough space for storing name in asf_read_metadata_obj
- avcodec/pngdec: Check blend_op.
- h264_mp4toannexb: fix pps offfset fault when there are more than one sps in avcc
- avcodec/h264_mp4toannexb_bsf: Use av_freep() to free spspps_buf
- avformat/avidec: Workaround broken initial frame
- avformat/hls: fix some cases of HLS streams which require cookies
- avcodec/pngdec: reset has_trns after every decode_frame_png()
- lavf/img2dec: Fix memory leak
- avcodec/mp3: fix skipping zeros
- avformat/srtdec: make sure we probe a number
- configure: check for ID3D11VideoContext
- avformat/vobsub: compare correct packet stream IDs
- avformat/srtdec: more lenient first line probing
- avformat/srtdec: fix number check for the first character
- avcodec/mips: build fix for MSA 64bit
- avcodec/mips: build fix for MSA
- avformat/httpauth: Add space after commas in HTTP/RTSP auth header
- libavformat/hlsenc: Use of uninitialized memory unlinking old files
- avcodec/x86/sbrdsp: Fix using uninitialized upper 32bit of noise
- avcodec/ffv1dec: Fix off by 1 error in quant_table_count check
- avcodec/ffv1dec: Explicitly check read_quant_table() return value
- dnxhddata: correct weight tables
- dnxhddec: decode and use interlace mb flag
- swscale: fix ticket #4877
- avcodec/rangecoder: Check e
- avcodec/ffv1: separate slice_count from max_slice_count
- swscale: fix ticket 4850
- cmdutils: Filter dst/srcw/h
- avutil/log: fix zero length gnu_printf format string warning
- lavf/webvttenc: Require webvtt file to contain exactly one WebVTT stream.
- swscale/swscale: Fix "unused variable" warning
- avcodec/mjpegdec: Fix decoding RGBA RCT LJPEG
- MAINTAINERS: add 2.8, drop 2.2
- doc: mention libavcodec can decode Opus natively
- hevc: properly handle no_rasl_output_flag when removing pictures from the DPB
- avfilter/af_ladspa: process all channels for nb_handles > 1
- configure: add libsoxr to swresample's pkgconfig
- lavc: Fix compilation with --disable-everything --enable-parser=mpeg4video.

version 2.8:
- colorkey video filter
- BFSTM/BCSTM demuxer
- little-endian ADPCM_THP decoder
- Hap decoder and encoder
- DirectDraw Surface image/texture decoder
- ssim filter
- optional new ASF demuxer
- showvolume filter
- Many improvements to the JPEG 2000 decoder
- Go2Meeting decoding support
- adrawgraph audio and drawgraph video filter
- removegrain video filter
- Intel QSV-accelerated MPEG-2 video and HEVC encoding
- Intel QSV-accelerated MPEG-2 video and HEVC decoding
- Intel QSV-accelerated VC-1 video decoding
- libkvazaar HEVC encoder
- erosion, dilation, deflate and inflate video filters
- Dynamic Audio Normalizer as dynaudnorm filter
- Reverse video and areverse audio filter
- Random filter
- deband filter
- AAC fixed-point decoding
- sidechaincompress audio filter
- bitstream filter for converting HEVC from MP4 to Annex B
- acrossfade audio filter
- allyuv and allrgb video sources
- atadenoise video filter
- OS X VideoToolbox support
- aphasemeter filter
- showfreqs filter
- vectorscope filter
- waveform filter
- hstack and vstack filter
- Support DNx100 (1440x1080@8)
- VAAPI hevc hwaccel
- VDPAU hevc hwaccel
- framerate filter
- Switched default encoders for webm to VP9 and Opus
- Removed experimental flag from the JPEG 2000 encoder


version 2.7:
- FFT video filter
- TDSC decoder
- DTS lossless extension (XLL) decoding (not lossless, disabled by default)
- showwavespic filter
- DTS decoding through libdcadec
- Drop support for nvenc API before 5.0
- nvenc HEVC encoder
- Detelecine filter
- Intel QSV-accelerated H.264 encoding
- MMAL-accelerated H.264 decoding
- basic APNG encoder and muxer with default extension "apng"
- unpack DivX-style packed B-frames in MPEG-4 bitstream filter
- WebM Live Chunk Muxer
- nvenc level and tier options
- chorus filter
- Canopus HQ/HQA decoder
- Automatically rotate videos based on metadata in ffmpeg
- improved Quickdraw compatibility
- VP9 high bit-depth and extended colorspaces decoding support
- WebPAnimEncoder API when available for encoding and muxing WebP
- Direct3D11-accelerated decoding
- Support Secure Transport
- Multipart JPEG demuxer


version 2.6:
- nvenc encoder
- 10bit spp filter
- colorlevels filter
- RIFX format for *.wav files
- RTP/mpegts muxer
- non continuous cache protocol support
- tblend filter
- cropdetect support for non 8bpp, absolute (if limit >= 1) and relative (if limit < 1.0) threshold
- Camellia symmetric block cipher
- OpenH264 encoder wrapper
- VOC seeking support
- Closed caption Decoder
- fspp, uspp, pp7 MPlayer postprocessing filters ported to native filters
- showpalette filter
- Twofish symmetric block cipher
- Support DNx100 (960x720@8)
- eq2 filter ported from libmpcodecs as eq filter
- removed libmpcodecs
- Changed default DNxHD colour range in QuickTime .mov derivatives to mpeg range
- ported softpulldown filter from libmpcodecs as repeatfields filter
- dcshift filter
- RTP depacketizer for loss tolerant payload format for MP3 audio (RFC 5219)
- RTP depacketizer for AC3 payload format (RFC 4184)
- palettegen and paletteuse filters
- VP9 RTP payload format (draft 0) experimental depacketizer
- RTP depacketizer for DV (RFC 6469)
- DXVA2-accelerated HEVC decoding
- AAC ELD 480 decoding
- Intel QSV-accelerated H.264 decoding
- DSS SP decoder and DSS demuxer
- Fix stsd atom corruption in DNxHD QuickTimes
- Canopus HQX decoder
- RTP depacketization of T.140 text (RFC 4103)
- Port MIPS optimizations to 64-bit


version 2.5:
- HEVC/H.265 RTP payload format (draft v6) packetizer
- SUP/PGS subtitle demuxer
- ffprobe -show_pixel_formats option
- CAST128 symmetric block cipher, ECB mode
- STL subtitle demuxer and decoder
- libutvideo YUV 4:2:2 10bit support
- XCB-based screen-grabber
- UDP-Lite support (RFC 3828)
- xBR scaling filter
- AVFoundation screen capturing support
- ffserver supports codec private options
- creating DASH compatible fragmented MP4, MPEG-DASH segmenting muxer
- WebP muxer with animated WebP support
- zygoaudio decoding support
- APNG demuxer
- postproc visualization support


version 2.4:
- Icecast protocol
- ported lenscorrection filter from frei0r filter
- large optimizations in dctdnoiz to make it usable
- ICY metadata are now requested by default with the HTTP protocol
- support for using metadata in stream specifiers in fftools
- LZMA compression support in TIFF decoder
- H.261 RTP payload format (RFC 4587) depacketizer and experimental packetizer
- HEVC/H.265 RTP payload format (draft v6) depacketizer
- added codecview filter to visualize information exported by some codecs
- Matroska 3D support thorugh side data
- HTML generation using texi2html is deprecated in favor of makeinfo/texi2any
- silenceremove filter


version 2.3:
- AC3 fixed-point decoding
- shuffleplanes filter
- subfile protocol
- Phantom Cine demuxer
- replaygain data export
- VP7 video decoder
- Alias PIX image encoder and decoder
- Improvements to the BRender PIX image decoder
- Improvements to the XBM decoder
- QTKit input device
- improvements to OpenEXR image decoder
- support decoding 16-bit RLE SGI images
- GDI screen grabbing for Windows
- alternative rendition support for HTTP Live Streaming
- AVFoundation input device
- Direct Stream Digital (DSD) decoder
- Magic Lantern Video (MLV) demuxer
- On2 AVC (Audio for Video) decoder
- support for decoding through DXVA2 in ffmpeg
- libbs2b-based stereo-to-binaural audio filter
- libx264 reference frames count limiting depending on level
- native Opus decoder
- display matrix export and rotation API
- WebVTT encoder
- showcqt multimedia filter
- zoompan filter
- signalstats filter
- hqx filter (hq2x, hq3x, hq4x)
- flanger filter
- Image format auto-detection
- LRC demuxer and muxer
- Samba protocol (via libsmbclient)
- WebM DASH Manifest muxer
- libfribidi support in drawtext


version 2.2:

- HNM version 4 demuxer and video decoder
- Live HDS muxer
- setsar/setdar filters now support variables in ratio expressions
- elbg filter
- string validation in ffprobe
- support for decoding through VDPAU in ffmpeg (the -hwaccel option)
- complete Voxware MetaSound decoder
- remove mp3_header_compress bitstream filter
- Windows resource files for shared libraries
- aeval filter
- stereoscopic 3d metadata handling
- WebP encoding via libwebp
- ATRAC3+ decoder
- VP8 in Ogg demuxing
- side & metadata support in NUT
- framepack filter
- XYZ12 rawvideo support in NUT
- Exif metadata support in WebP decoder
- OpenGL device
- Use metadata_header_padding to control padding in ID3 tags (currently used in
  MP3, AIFF, and OMA files), FLAC header, and the AVI "junk" block.
- Mirillis FIC video decoder
- Support DNx444
- libx265 encoder
- dejudder filter
- Autodetect VDA like all other hardware accelerations
- aliases and defaults for Ogg subtypes (opus, spx)


version 2.1:

- aecho filter
- perspective filter ported from libmpcodecs
- ffprobe -show_programs option
- compand filter
- RTMP seek support
- when transcoding with ffmpeg (i.e. not streamcopying), -ss is now accurate
  even when used as an input option. Previous behavior can be restored with
  the -noaccurate_seek option.
- ffmpeg -t option can now be used for inputs, to limit the duration of
  data read from an input file
- incomplete Voxware MetaSound decoder
- read EXIF metadata from JPEG
- DVB teletext decoder
- phase filter ported from libmpcodecs
- w3fdif filter
- Opus support in Matroska
- FFV1 version 1.3 is stable and no longer experimental
- FFV1: YUVA(444,422,420) 9, 10 and 16 bit support
- changed DTS stream id in lavf mpeg ps muxer from 0x8a to 0x88, to be
  more consistent with other muxers.
- adelay filter
- pullup filter ported from libmpcodecs
- ffprobe -read_intervals option
- Lossless and alpha support for WebP decoder
- Error Resilient AAC syntax (ER AAC LC) decoding
- Low Delay AAC (ER AAC LD) decoding
- mux chapters in ASF files
- SFTP protocol (via libssh)
- libx264: add ability to encode in YUVJ422P and YUVJ444P
- Fraps: use BT.709 colorspace by default for yuv, as reference fraps decoder does
- make decoding alpha optional for prores, ffv1 and vp6 by setting
  the skip_alpha flag.
- ladspa wrapper filter
- native VP9 decoder
- dpx parser
- max_error_rate parameter in ffmpeg
- PulseAudio output device
- ReplayGain scanner
- Enhanced Low Delay AAC (ER AAC ELD) decoding (no LD SBR support)
- Linux framebuffer output device
- HEVC decoder
- raw HEVC, HEVC in MOV/MP4, HEVC in Matroska, HEVC in MPEG-TS demuxing
- mergeplanes filter


version 2.0:

- curves filter
- reference-counting for AVFrame and AVPacket data
- ffmpeg now fails when input options are used for output file
  or vice versa
- support for Monkey's Audio versions from 3.93
- perms and aperms filters
- audio filtering support in ffplay
- 10% faster aac encoding on x86 and MIPS
- sine audio filter source
- WebP demuxing and decoding support
- ffmpeg options -filter_script and -filter_complex_script, which allow a
  filtergraph description to be read from a file
- OpenCL support
- audio phaser filter
- separatefields filter
- libquvi demuxer
- uniform options syntax across all filters
- telecine filter
- interlace filter
- smptehdbars source
- inverse telecine filters (fieldmatch and decimate)
- colorbalance filter
- colorchannelmixer filter
- The matroska demuxer can now output proper verbatim ASS packets. It will
  become the default at the next libavformat major bump.
- decent native animated GIF encoding
- asetrate filter
- interleave filter
- timeline editing with filters
- vidstabdetect and vidstabtransform filters for video stabilization using
  the vid.stab library
- astats filter
- trim and atrim filters
- ffmpeg -t and -ss (output-only) options are now sample-accurate when
  transcoding audio
- Matroska muxer can now put the index at the beginning of the file.
- extractplanes filter
- avectorscope filter
- ADPCM DTK decoder
- ADP demuxer
- RSD demuxer
- RedSpark demuxer
- ADPCM IMA Radical decoder
- zmq filters
- DCT denoiser filter (dctdnoiz)
- Wavelet denoiser filter ported from libmpcodecs as owdenoise (formerly "ow")
- Apple Intermediate Codec decoder
- Escape 130 video decoder
- FTP protocol support
- V4L2 output device
- 3D LUT filter (lut3d)
- SMPTE 302M audio encoder
- support for slice multithreading in libavfilter
- Hald CLUT support (generation and filtering)
- VC-1 interlaced B-frame support
- support for WavPack muxing (raw and in Matroska)
- XVideo output device
- vignette filter
- True Audio (TTA) encoder
- Go2Webinar decoder
- mcdeint filter ported from libmpcodecs
- sab filter ported from libmpcodecs
- ffprobe -show_chapters option
- WavPack encoding through libwavpack
- rotate filter
- spp filter ported from libmpcodecs
- libgme support
- psnr filter


version 1.2:

- VDPAU hardware acceleration through normal hwaccel
- SRTP support
- Error diffusion dither in Swscale
- Chained Ogg support
- Theora Midstream reconfiguration support
- EVRC decoder
- audio fade filter
- filtering audio with unknown channel layout
- allpass, bass, bandpass, bandreject, biquad, equalizer, highpass, lowpass
  and treble audio filter
- improved showspectrum filter, with multichannel support and sox-like colors
- histogram filter
- tee muxer
- il filter ported from libmpcodecs
- support ID3v2 tags in ASF files
- encrypted TTA stream decoding support
- RF64 support in WAV muxer
- noise filter ported from libmpcodecs
- Subtitles character encoding conversion
- blend filter
- stereo3d filter ported from libmpcodecs


version 1.1:

- stream disposition information printing in ffprobe
- filter for loudness analysis following EBU R128
- Opus encoder using libopus
- ffprobe -select_streams option
- Pinnacle TARGA CineWave YUV16 decoder
- TAK demuxer, decoder and parser
- DTS-HD demuxer
- remove -same_quant, it hasn't worked for years
- FFM2 support
- X-Face image encoder and decoder
- 24-bit FLAC encoding
- multi-channel ALAC encoding up to 7.1
- metadata (INFO tag) support in WAV muxer
- subtitles raw text decoder
- support for building DLLs using MSVC
- LVF demuxer
- ffescape tool
- metadata (info chunk) support in CAF muxer
- field filter ported from libmpcodecs
- AVR demuxer
- geq filter ported from libmpcodecs
- remove ffserver daemon mode
- AST muxer/demuxer
- new expansion syntax for drawtext
- BRender PIX image decoder
- ffprobe -show_entries option
- ffprobe -sections option
- ADPCM IMA Dialogic decoder
- BRSTM demuxer
- animated GIF decoder and demuxer
- PVF demuxer
- subtitles filter
- IRCAM muxer/demuxer
- Paris Audio File demuxer
- Virtual concatenation demuxer
- VobSub demuxer
- JSON captions for TED talks decoding support
- SOX Resampler support in libswresample
- aselect filter
- SGI RLE 8-bit / Silicon Graphics RLE 8-bit video decoder
- Silicon Graphics Motion Video Compressor 1 & 2 decoder
- Silicon Graphics Movie demuxer
- apad filter
- Resolution & pixel format change support with multithreading for H.264
- documentation split into per-component manuals
- pp (postproc) filter ported from MPlayer
- NIST Sphere demuxer
- MPL2, VPlayer, MPlayer, AQTitle, PJS and SubViewer v1 subtitles demuxers and decoders
- Sony Wave64 muxer
- adobe and limelight publisher authentication in RTMP
- data: URI scheme
- support building on the Plan 9 operating system
- kerndeint filter ported from MPlayer
- histeq filter ported from VirtualDub
- Megalux Frame demuxer
- 012v decoder
- Improved AVC Intra decoding support


version 1.0:

- INI and flat output in ffprobe
- Scene detection in libavfilter
- Indeo Audio decoder
- channelsplit audio filter
- setnsamples audio filter
- atempo filter
- ffprobe -show_data option
- RTMPT protocol support
- iLBC encoding/decoding via libilbc
- Microsoft Screen 1 decoder
- join audio filter
- audio channel mapping filter
- Microsoft ATC Screen decoder
- RTSP listen mode
- TechSmith Screen Codec 2 decoder
- AAC encoding via libfdk-aac
- Microsoft Expression Encoder Screen decoder
- RTMPS protocol support
- RTMPTS protocol support
- RTMPE protocol support
- RTMPTE protocol support
- showwaves and showspectrum filter
- LucasArts SMUSH SANM playback support
- LucasArts SMUSH VIMA audio decoder (ADPCM)
- LucasArts SMUSH demuxer
- SAMI, RealText and SubViewer demuxers and decoders
- Heart Of Darkness PAF playback support
- iec61883 device
- asettb filter
- new option: -progress
- 3GPP Timed Text encoder/decoder
- GeoTIFF decoder support
- ffmpeg -(no)stdin option
- Opus decoder using libopus
- caca output device using libcaca
- alphaextract and alphamerge filters
- concat filter
- flite filter
- Canopus Lossless Codec decoder
- bitmap subtitles in filters (experimental and temporary)
- MP2 encoding via TwoLAME
- bmp parser
- smptebars source
- asetpts filter
- hue filter
- ICO muxer
- SubRip encoder and decoder without embedded timing
- edge detection filter
- framestep filter
- ffmpeg -shortest option is now per-output file
  -pass and -passlogfile are now per-output stream
- volume measurement filter
- Ut Video encoder
- Microsoft Screen 2 decoder
- smartblur filter ported from MPlayer
- CPiA decoder
- decimate filter ported from MPlayer
- RTP depacketization of JPEG
- Smooth Streaming live segmenter muxer
- F4V muxer
- sendcmd and asendcmd filters
- WebVTT demuxer and decoder (simple tags supported)
- RTP packetization of JPEG
- faststart option in the MOV/MP4 muxer
- support for building with MSVC


version 0.11:

- Fixes: CVE-2012-2772, CVE-2012-2774, CVE-2012-2775, CVE-2012-2776, CVE-2012-2777,
         CVE-2012-2779, CVE-2012-2782, CVE-2012-2783, CVE-2012-2784, CVE-2012-2785,
         CVE-2012-2786, CVE-2012-2787, CVE-2012-2788, CVE-2012-2789, CVE-2012-2790,
         CVE-2012-2791, CVE-2012-2792, CVE-2012-2793, CVE-2012-2794, CVE-2012-2795,
         CVE-2012-2796, CVE-2012-2797, CVE-2012-2798, CVE-2012-2799, CVE-2012-2800,
         CVE-2012-2801, CVE-2012-2802, CVE-2012-2803, CVE-2012-2804,
- v408 Quicktime and Microsoft AYUV Uncompressed 4:4:4:4 encoder and decoder
- setfield filter
- CDXL demuxer and decoder
- Apple ProRes encoder
- ffprobe -count_packets and -count_frames options
- Sun Rasterfile Encoder
- ID3v2 attached pictures reading and writing
- WMA Lossless decoder
- bluray protocol
- blackdetect filter
- libutvideo encoder wrapper (--enable-libutvideo)
- swapuv filter
- bbox filter
- XBM encoder and decoder
- RealAudio Lossless decoder
- ZeroCodec decoder
- tile video filter
- Metal Gear Solid: The Twin Snakes demuxer
- OpenEXR image decoder
- removelogo filter
- drop support for ffmpeg without libavfilter
- drawtext video filter: fontconfig support
- ffmpeg -benchmark_all option
- super2xsai filter ported from libmpcodecs
- add libavresample audio conversion library for compatibility
- MicroDVD decoder
- Avid Meridien (AVUI) encoder and decoder
- accept + prefix to -pix_fmt option to disable automatic conversions.
- complete audio filtering in libavfilter and ffmpeg
- add fps filter
- vorbis parser
- png parser
- audio mix filter
- ffv1: support (draft) version 1.3


version 0.10:

- Fixes: CVE-2011-3929, CVE-2011-3934, CVE-2011-3935, CVE-2011-3936,
         CVE-2011-3937, CVE-2011-3940, CVE-2011-3941, CVE-2011-3944,
         CVE-2011-3945, CVE-2011-3946, CVE-2011-3947, CVE-2011-3949,
         CVE-2011-3950, CVE-2011-3951, CVE-2011-3952
- v410 Quicktime Uncompressed 4:4:4 10-bit encoder and decoder
- SBaGen (SBG) binaural beats script demuxer
- OpenMG Audio muxer
- Timecode extraction in DV and MOV
- thumbnail video filter
- XML output in ffprobe
- asplit audio filter
- tinterlace video filter
- astreamsync audio filter
- amerge audio filter
- ISMV (Smooth Streaming) muxer
- GSM audio parser
- SMJPEG muxer
- XWD encoder and decoder
- Automatic thread count based on detection number of (available) CPU cores
- y41p Brooktree Uncompressed 4:1:1 12-bit encoder and decoder
- ffprobe -show_error option
- Avid 1:1 10-bit RGB Packer codec
- v308 Quicktime Uncompressed 4:4:4 encoder and decoder
- yuv4 libquicktime packed 4:2:0 encoder and decoder
- ffprobe -show_frames option
- silencedetect audio filter
- ffprobe -show_program_version, -show_library_versions, -show_versions options
- rv34: frame-level multi-threading
- optimized iMDCT transform on x86 using SSE for for mpegaudiodec
- Improved PGS subtitle decoder
- dumpgraph option to lavfi device
- r210 and r10k encoders
- ffwavesynth decoder
- aviocat tool
- ffeval tool
- support encoding and decoding 4-channel SGI images


version 0.9:

- openal input device added
- boxblur filter added
- BWF muxer
- Flash Screen Video 2 decoder
- lavfi input device added
- added avconv, which is almost the same for now, except
for a few incompatible changes in the options, which will hopefully make them
easier to use. The changes are:
    * The options placement is now strictly enforced! While in theory the
      options for ffmpeg should be given in [input options] -i INPUT [output
      options] OUTPUT order, in practice it was possible to give output options
      before the -i and it mostly worked. Except when it didn't - the behavior was
      a bit inconsistent. In avconv, it is not possible to mix input and output
      options. All non-global options are reset after an input or output filename.
    * All per-file options are now truly per-file - they apply only to the next
      input or output file and specifying different values for different files
      will now work properly (notably -ss and -t options).
    * All per-stream options are now truly per-stream - it is possible to
      specify which stream(s) should a given option apply to. See the Stream
      specifiers section in the avconv manual for details.
    * In ffmpeg some options (like -newvideo/-newaudio/...) are irregular in the
      sense that they're specified after the output filename instead of before,
      like all other options. In avconv this irregularity is removed, all options
      apply to the next input or output file.
    * -newvideo/-newaudio/-newsubtitle options were removed. Not only were they
      irregular and highly confusing, they were also redundant. In avconv the -map
      option will create new streams in the output file and map input streams to
      them. E.g. avconv -i INPUT -map 0 OUTPUT will create an output stream for
      each stream in the first input file.
    * The -map option now has slightly different and more powerful syntax:
        + Colons (':') are used to separate file index/stream type/stream index
          instead of dots. Comma (',') is used to separate the sync stream instead
          of colon.. This is done for consistency with other options.
        + It's possible to specify stream type. E.g. -map 0:a:2 creates an
          output stream from the third input audio stream.
        + Omitting the stream index now maps all the streams of the given type,
          not just the first. E.g. -map 0:s creates output streams for all the
          subtitle streams in the first input file.
        + Since -map can now match multiple streams, negative mappings were
          introduced. Negative mappings disable some streams from an already
          defined map. E.g. '-map 0 -map -0:a:1' means 'create output streams for
          all the stream in the first input file, except for the second audio
          stream'.
    * There is a new option -c (or -codec) for choosing the decoder/encoder to
      use, which makes it possible to precisely specify target stream(s) consistently with
      other options. E.g. -c:v lib264 sets the codec for all video streams, -c:a:0
      libvorbis sets the codec for the first audio stream and -c copy copies all
      the streams without reencoding. Old -vcodec/-acodec/-scodec options are now
      aliases to -c:v/a/s
    * It is now possible to precisely specify which stream should an AVOption
      apply to. E.g. -b:v:0 2M sets the bitrate for the first video stream, while
      -b:a 128k sets the bitrate for all audio streams. Note that the old -ab 128k
      syntax is deprecated and will stop working soon.
    * -map_chapters now takes only an input file index and applies to the next
      output file. This is consistent with how all the other options work.
    * -map_metadata now takes only an input metadata specifier and applies to
      the next output file. Output metadata specifier is now part of the option
      name, similarly to the AVOptions/map/codec feature above.
    * -metadata can now be used to set metadata on streams and chapters, e.g.
      -metadata:s:1 language=eng sets the language of the first stream to 'eng'.
      This made -vlang/-alang/-slang options redundant, so they were removed.
    * -qscale option now uses stream specifiers and applies to all streams, not
      just video. I.e. plain -qscale number would now apply to all streams. To get
      the old behavior, use -qscale:v. Also there is now a shortcut -q for -qscale
      and -aq is now an alias for -q:a.
    * -vbsf/-absf/-sbsf options were removed and replaced by a -bsf option which
      uses stream specifiers. Use -bsf:v/a/s instead of the old options.
    * -itsscale option now uses stream specifiers, so its argument is only the
      scale parameter.
    * -intra option was removed, use -g 0 for the same effect.
    * -psnr option was removed, use -flags +psnr for the same effect.
    * -vf option is now an alias to the new -filter option, which uses stream specifiers.
    * -vframes/-aframes/-dframes options are now aliases to the new -frames option.
    * -vtag/-atag/-stag options are now aliases to the new -tag option.
- XMV demuxer
- LOAS demuxer
- ashowinfo filter added
- Windows Media Image decoder
- amovie source added
- LATM muxer/demuxer
- Speex encoder via libspeex
- JSON output in ffprobe
- WTV muxer
- Optional C++ Support (needed for libstagefright)
- H.264 Decoding on Android via Stagefright
- Prores decoder
- BIN/XBIN/ADF/IDF text file decoder
- aconvert audio filter added
- audio support to lavfi input device added
- libcdio-paranoia input device for audio CD grabbing
- Apple ProRes decoder
- CELT in Ogg demuxing
- G.723.1 demuxer and decoder
- libmodplug support (--enable-libmodplug)
- VC-1 interlaced decoding
- libutvideo wrapper (--enable-libutvideo)
- aevalsrc audio source added
- Ut Video decoder
- Speex encoding via libspeex
- 4:2:2 H.264 decoding support
- 4:2:2 and 4:4:4 H.264 encoding with libx264
- Pulseaudio input device
- Prores encoder
- Video Decoder Acceleration (VDA) HWAccel module.
- replacement Indeo 3 decoder
- new ffmpeg option: -map_channel
- volume audio filter added
- earwax audio filter added
- libv4l2 support (--enable-libv4l2)
- TLS/SSL and HTTPS protocol support
- AVOptions API rewritten and documented
- most of CODEC_FLAG2_*, some CODEC_FLAG_* and many codec-specific fields in
  AVCodecContext deprecated. Codec private options should be used instead.
- Properly working defaults in libx264 wrapper, support for native presets.
- Encrypted OMA files support
- Discworld II BMV decoding support
- VBLE Decoder
- OS X Video Decoder Acceleration (VDA) support
- compact and csv output in ffprobe
- pan audio filter
- IFF Amiga Continuous Bitmap (ACBM) decoder
- ass filter
- CRI ADX audio format muxer and demuxer
- Playstation Portable PMP format demuxer
- Microsoft Windows ICO demuxer
- life source
- PCM format support in OMA demuxer
- CLJR encoder
- new option: -report
- Dxtory capture format decoder
- cellauto source
- Simple segmenting muxer
- Indeo 4 decoder
- SMJPEG demuxer


version 0.8:

- many many things we forgot because we rather write code than changelogs
- WebM support in Matroska de/muxer
- low overhead Ogg muxing
- MMS-TCP support
- VP8 de/encoding via libvpx
- Demuxer for On2's IVF format
- Pictor/PC Paint decoder
- HE-AAC v2 decoder
- HE-AAC v2 encoding with libaacplus
- libfaad2 wrapper removed
- DTS-ES extension (XCh) decoding support
- native VP8 decoder
- RTSP tunneling over HTTP
- RTP depacketization of SVQ3
- -strict inofficial replaced by -strict unofficial
- ffplay -exitonkeydown and -exitonmousedown options added
- native GSM / GSM MS decoder
- RTP depacketization of QDM2
- ANSI/ASCII art playback system
- Lego Mindstorms RSO de/muxer
- libavcore added (and subsequently removed)
- SubRip subtitle file muxer and demuxer
- Chinese AVS encoding via libxavs
- ffprobe -show_packets option added
- RTP packetization of Theora and Vorbis
- RTP depacketization of MP4A-LATM
- RTP packetization and depacketization of VP8
- hflip filter
- Apple HTTP Live Streaming demuxer
- a64 codec
- MMS-HTTP support
- G.722 ADPCM audio encoder/decoder
- R10k video decoder
- ocv_smooth filter
- frei0r wrapper filter
- change crop filter syntax to width:height:x:y
- make the crop filter accept parametric expressions
- make ffprobe accept AVFormatContext options
- yadif filter
- blackframe filter
- Demuxer for Leitch/Harris' VR native stream format (LXF)
- RTP depacketization of the X-QT QuickTime format
- SAP (Session Announcement Protocol, RFC 2974) muxer and demuxer
- cropdetect filter
- ffmpeg -crop* options removed
- transpose filter added
- ffmpeg -force_key_frames option added
- demuxer for receiving raw rtp:// URLs without an SDP description
- single stream LATM/LOAS decoder
- setpts filter added
- Win64 support for optimized x86 assembly functions
- MJPEG/AVI1 to JPEG/JFIF bitstream filter
- ASS subtitle encoder and decoder
- IEC 61937 encapsulation for E-AC-3, TrueHD, DTS-HD (for HDMI passthrough)
- overlay filter added
- rename aspect filter to setdar, and pixelaspect to setsar
- IEC 61937 demuxer
- Mobotix .mxg demuxer
- frei0r source added
- hqdn3d filter added
- RTP depacketization of QCELP
- FLAC parser added
- gradfun filter added
- AMR-WB decoder
- replace the ocv_smooth filter with a more generic ocv filter
- Windows Televison (WTV) demuxer
- FFmpeg metadata format muxer and demuxer
- SubRip (srt) subtitle encoder and decoder
- floating-point AC-3 encoder added
- Lagarith decoder
- ffmpeg -copytb option added
- IVF muxer added
- Wing Commander IV movies decoder added
- movie source added
- Bink version 'b' audio and video decoder
- Bitmap Brothers JV playback system
- Apple HTTP Live Streaming protocol handler
- sndio support for playback and record
- Linux framebuffer input device added
- Chronomaster DFA decoder
- DPX image encoder
- MicroDVD subtitle file muxer and demuxer
- Playstation Portable PMP format demuxer
- fieldorder video filter added
- AAC encoding via libvo-aacenc
- AMR-WB encoding via libvo-amrwbenc
- xWMA demuxer
- Mobotix MxPEG decoder
- VP8 frame-multithreading
- NEON optimizations for VP8
- Lots of deprecated API cruft removed
- fft and imdct optimizations for AVX (Sandy Bridge) processors
- showinfo filter added
- SMPTE 302M AES3 audio decoder
- Apple Core Audio Format muxer
- 9bit and 10bit per sample support in the H.264 decoder
- 9bit and 10bit FFV1 encoding / decoding
- split filter added
- select filter added
- sdl output device added
- libmpcodecs video filter support (3 times as many filters than before)
- mpeg2 aspect ratio dection fixed
- libxvid aspect pickiness fixed
- Frame multithreaded decoding
- E-AC-3 audio encoder
- ac3enc: add channel coupling support
- floating-point sample format support to the ac3, eac3, dca, aac, and vorbis decoders.
- H264/MPEG frame-level multi-threading
- All av_metadata_* functions renamed to av_dict_* and moved to libavutil
- 4:4:4 H.264 decoding support
- 10-bit H.264 optimizations for x86
- lut, lutrgb, and lutyuv filters added
- buffersink libavfilter sink added
- Bump libswscale for recently reported ABI break
- New J2K encoder (via OpenJPEG)


version 0.7:

- all the changes for 0.8, but keeping API/ABI compatibility with the 0.6 release


version 0.6:

- PB-frame decoding for H.263
- deprecated vhook subsystem removed
- deprecated old scaler removed
- VQF demuxer
- Alpha channel scaler
- PCX encoder
- RTP packetization of H.263
- RTP packetization of AMR
- RTP depacketization of Vorbis
- CorePNG decoding support
- Cook multichannel decoding support
- introduced avlanguage helpers in libavformat
- 8088flex TMV demuxer and decoder
- per-stream language-tags extraction in asfdec
- V210 decoder and encoder
- remaining GPL parts in AC-3 decoder converted to LGPL
- QCP demuxer
- SoX native format muxer and demuxer
- AMR-NB decoding/encoding, AMR-WB decoding via OpenCORE libraries
- DPX image decoder
- Electronic Arts Madcow decoder
- DivX (XSUB) subtitle encoder
- nonfree libamr support for AMR-NB/WB decoding/encoding removed
- experimental AAC encoder
- RTP depacketization of ASF and RTSP from WMS servers
- RTMP support in libavformat
- noX handling for OPT_BOOL X options
- Wave64 demuxer
- IEC-61937 compatible Muxer
- TwinVQ decoder
- Bluray (PGS) subtitle decoder
- LPCM support in MPEG-TS (HDMV RID as found on Blu-ray disks)
- WMA Pro decoder
- Core Audio Format demuxer
- ATRAC1 decoder
- MD STUDIO audio demuxer
- RF64 support in WAV demuxer
- MPEG-4 Audio Lossless Coding (ALS) decoder
- -formats option split into -formats, -codecs, -bsfs, and -protocols
- IV8 demuxer
- CDG demuxer and decoder
- R210 decoder
- Auravision Aura 1 and 2 decoders
- Deluxe Paint Animation playback system
- SIPR decoder
- Adobe Filmstrip muxer and demuxer
- RTP depacketization of H.263
- Bink demuxer and audio/video decoders
- enable symbol versioning by default for linkers that support it
- IFF PBM/ILBM bitmap decoder
- concat protocol
- Indeo 5 decoder
- RTP depacketization of AMR
- WMA Voice decoder
- ffprobe tool
- AMR-NB decoder
- RTSP muxer
- HE-AAC v1 decoder
- Kega Game Video (KGV1) decoder
- VorbisComment writing for FLAC, Ogg FLAC and Ogg Speex files
- RTP depacketization of Theora
- HTTP Digest authentication
- RTMP/RTMPT/RTMPS/RTMPE/RTMPTE protocol support via librtmp
- Psygnosis YOP demuxer and video decoder
- spectral extension support in the E-AC-3 decoder
- unsharp video filter
- RTP hinting in the mov/3gp/mp4 muxer
- Dirac in Ogg demuxing
- seek to keyframes in Ogg
- 4:2:2 and 4:4:4 Theora decoding
- 35% faster VP3/Theora decoding
- faster AAC decoding
- faster H.264 decoding
- RealAudio 1.0 (14.4K) encoder


version 0.5:

- DV50 AKA DVCPRO50 encoder, decoder, muxer and demuxer
- TechSmith Camtasia (TSCC) video decoder
- IBM Ultimotion (ULTI) video decoder
- Sierra Online audio file demuxer and decoder
- Apple QuickDraw (qdrw) video decoder
- Creative ADPCM audio decoder (16 bits as well as 8 bits schemes)
- Electronic Arts Multimedia (WVE/UV2/etc.) file demuxer
- Miro VideoXL (VIXL) video decoder
- H.261 video encoder
- QPEG video decoder
- Nullsoft Video (NSV) file demuxer
- Shorten audio decoder
- LOCO video decoder
- Apple Lossless Audio Codec (ALAC) decoder
- Winnov WNV1 video decoder
- Autodesk Animator Studio Codec (AASC) decoder
- Indeo 2 video decoder
- Fraps FPS1 video decoder
- Snow video encoder/decoder
- Sonic audio encoder/decoder
- Vorbis audio decoder
- Macromedia ADPCM decoder
- Duck TrueMotion 2 video decoder
- support for decoding FLX and DTA extensions in FLIC files
- H.264 custom quantization matrices support
- ffserver fixed, it should now be usable again
- QDM2 audio decoder
- Real Cooker audio decoder
- TrueSpeech audio decoder
- WMA2 audio decoder fixed, now all files should play correctly
- RealAudio 14.4 and 28.8 decoders fixed
- JPEG-LS decoder
- build system improvements
- tabs and trailing whitespace removed from the codebase
- CamStudio video decoder
- AIFF/AIFF-C audio format, encoding and decoding
- ADTS AAC file reading and writing
- Creative VOC file reading and writing
- American Laser Games multimedia (*.mm) playback system
- Zip Motion Blocks Video decoder
- improved Theora/VP3 decoder
- True Audio (TTA) decoder
- AVS demuxer and video decoder
- JPEG-LS encoder
- Smacker demuxer and decoder
- NuppelVideo/MythTV demuxer and RTjpeg decoder
- KMVC decoder
- MPEG-2 intra VLC support
- MPEG-2 4:2:2 encoder
- Flash Screen Video decoder
- GXF demuxer
- Chinese AVS decoder
- GXF muxer
- MXF demuxer
- VC-1/WMV3/WMV9 video decoder
- MacIntel support
- AviSynth support
- VMware video decoder
- VP5 video decoder
- VP6 video decoder
- WavPack lossless audio decoder
- Targa (.TGA) picture decoder
- Vorbis audio encoder
- Delphine Software .cin demuxer/audio and video decoder
- Tiertex .seq demuxer/video decoder
- MTV demuxer
- TIFF picture encoder and decoder
- GIF picture decoder
- Intel Music Coder decoder
- Zip Motion Blocks Video encoder
- Musepack decoder
- Flash Screen Video encoder
- Theora encoding via libtheora
- BMP encoder
- WMA encoder
- GSM-MS encoder and decoder
- DCA decoder
- DXA demuxer and decoder
- DNxHD decoder
- Gamecube movie (.THP) playback system
- Blackfin optimizations
- Interplay C93 demuxer and video decoder
- Bethsoft VID demuxer and video decoder
- CRYO APC demuxer
- ATRAC3 decoder
- V.Flash PTX decoder
- RoQ muxer, RoQ audio encoder
- Renderware TXD demuxer and decoder
- extern C declarations for C++ removed from headers
- sws_flags command line option
- codebook generator
- RoQ video encoder
- QTRLE encoder
- OS/2 support removed and restored again
- AC-3 decoder
- NUT muxer
- additional SPARC (VIS) optimizations
- Matroska muxer
- slice-based parallel H.264 decoding
- Monkey's Audio demuxer and decoder
- AMV audio and video decoder
- DNxHD encoder
- H.264 PAFF decoding
- Nellymoser ASAO decoder
- Beam Software SIFF demuxer and decoder
- libvorbis Vorbis decoding removed in favor of native decoder
- IntraX8 (J-Frame) subdecoder for WMV2 and VC-1
- Ogg (Theora, Vorbis and FLAC) muxer
- The "device" muxers and demuxers are now in a new libavdevice library
- PC Paintbrush PCX decoder
- Sun Rasterfile decoder
- TechnoTrend PVA demuxer
- Linux Media Labs MPEG-4 (LMLM4) demuxer
- AVM2 (Flash 9) SWF muxer
- QT variant of IMA ADPCM encoder
- VFW grabber
- iPod/iPhone compatible mp4 muxer
- Mimic decoder
- MSN TCP Webcam stream demuxer
- RL2 demuxer / decoder
- IFF demuxer
- 8SVX audio decoder
- non-recursive Makefiles
- BFI demuxer
- MAXIS EA XA (.xa) demuxer / decoder
- BFI video decoder
- OMA demuxer
- MLP/TrueHD decoder
- Electronic Arts CMV decoder
- Motion Pixels Video decoder
- Motion Pixels MVI demuxer
- removed animated GIF decoder/demuxer
- D-Cinema audio muxer
- Electronic Arts TGV decoder
- Apple Lossless Audio Codec (ALAC) encoder
- AAC decoder
- floating point PCM encoder/decoder
- MXF muxer
- DV100 AKA DVCPRO HD decoder and demuxer
- E-AC-3 support added to AC-3 decoder
- Nellymoser ASAO encoder
- ASS and SSA demuxer and muxer
- liba52 wrapper removed
- SVQ3 watermark decoding support
- Speex decoding via libspeex
- Electronic Arts TGQ decoder
- RV40 decoder
- QCELP / PureVoice decoder
- RV30 decoder
- hybrid WavPack support
- R3D REDCODE demuxer
- ALSA support for playback and record
- Electronic Arts TQI decoder
- OpenJPEG based JPEG 2000 decoder
- NC (NC4600) camera file demuxer
- Gopher client support
- MXF D-10 muxer
- generic metadata API
- flash ScreenVideo2 encoder


version 0.4.9-pre1:

- DV encoder, DV muxer
- Microsoft RLE video decoder
- Microsoft Video-1 decoder
- Apple Animation (RLE) decoder
- Apple Graphics (SMC) decoder
- Apple Video (RPZA) decoder
- Cinepak decoder
- Sega FILM (CPK) file demuxer
- Westwood multimedia support (VQA & AUD files)
- Id Quake II CIN playback support
- 8BPS video decoder
- FLIC playback support
- RealVideo 2.0 (RV20) decoder
- Duck TrueMotion v1 (DUCK) video decoder
- Sierra VMD demuxer and video decoder
- MSZH and ZLIB decoder support
- SVQ1 video encoder
- AMR-WB support
- PPC optimizations
- rate distortion optimal cbp support
- rate distorted optimal ac prediction for MPEG-4
- rate distorted optimal lambda->qp support
- AAC encoding with libfaac
- Sunplus JPEG codec (SP5X) support
- use Lagrange multipler instead of QP for ratecontrol
- Theora/VP3 decoding support
- XA and ADX ADPCM codecs
- export MPEG-2 active display area / pan scan
- Add support for configuring with IBM XLC
- floating point AAN DCT
- initial support for zygo video (not complete)
- RGB ffv1 support
- new audio/video parser API
- av_log() system
- av_read_frame() and av_seek_frame() support
- missing last frame fixes
- seek by mouse in ffplay
- noise reduction of DCT coefficients
- H.263 OBMC & 4MV support
- H.263 alternative inter vlc support
- H.263 loop filter
- H.263 slice structured mode
- interlaced DCT support for MPEG-2 encoding
- stuffing to stay above min_bitrate
- MB type & QP visualization
- frame stepping for ffplay
- interlaced motion estimation
- alternate scantable support
- SVCD scan offset support
- closed GOP support
- SSE2 FDCT
- quantizer noise shaping
- G.726 ADPCM audio codec
- MS ADPCM encoding
- multithreaded/SMP motion estimation
- multithreaded/SMP encoding for MPEG-1/MPEG-2/MPEG-4/H.263
- multithreaded/SMP decoding for MPEG-2
- FLAC decoder
- Metrowerks CodeWarrior suppport
- H.263+ custom pcf support
- nicer output for 'ffmpeg -formats'
- Matroska demuxer
- SGI image format, encoding and decoding
- H.264 loop filter support
- H.264 CABAC support
- nicer looking arrows for the motion vector visualization
- improved VCD support
- audio timestamp drift compensation
- MPEG-2 YUV 422/444 support
- polyphase kaiser windowed sinc and blackman nuttall windowed sinc audio resample
- better image scaling
- H.261 support
- correctly interleave packets during encoding
- VIS optimized motion compensation
- intra_dc_precision>0 encoding support
- support reuse of motion vectors/MB types/field select values of the source video
- more accurate deblock filter
- padding support
- many optimizations and bugfixes
- FunCom ISS audio file demuxer and according ADPCM decoding


version 0.4.8:

- MPEG-2 video encoding (Michael)
- Id RoQ playback subsystem (Mike Melanson and Tim Ferguson)
- Wing Commander III Movie (.mve) file playback subsystem (Mike Melanson
  and Mario Brito)
- Xan DPCM audio decoder (Mario Brito)
- Interplay MVE playback subsystem (Mike Melanson)
- Duck DK3 and DK4 ADPCM audio decoders (Mike Melanson)


version 0.4.7:

- RealAudio 1.0 (14_4) and 2.0 (28_8) native decoders. Author unknown, code from mplayerhq
  (originally from public domain player for Amiga at http://www.honeypot.net/audio)
- current version now also compiles with older GCC (Fabrice)
- 4X multimedia playback system including 4xm file demuxer (Mike
  Melanson), and 4X video and audio codecs (Michael)
- Creative YUV (CYUV) decoder (Mike Melanson)
- FFV1 codec (our very simple lossless intra only codec, compresses much better
  than HuffYUV) (Michael)
- ASV1 (Asus), H.264, Intel indeo3 codecs have been added (various)
- tiny PNG encoder and decoder, tiny GIF decoder, PAM decoder (PPM with
  alpha support), JPEG YUV colorspace support. (Fabrice Bellard)
- ffplay has been replaced with a newer version which uses SDL (optionally)
  for multiplatform support (Fabrice)
- Sorenson Version 3 codec (SVQ3) support has been added (decoding only) - donated
  by anonymous
- AMR format has been added (Johannes Carlsson)
- 3GP support has been added (Johannes Carlsson)
- VP3 codec has been added (Mike Melanson)
- more MPEG-1/2 fixes
- better multiplatform support, MS Visual Studio fixes (various)
- AltiVec optimizations (Magnus Damn and others)
- SH4 processor support has been added (BERO)
- new public interfaces (avcodec_get_pix_fmt) (Roman Shaposhnick)
- VOB streaming support (Brian Foley)
- better MP3 autodetection (Andriy Rysin)
- qpel encoding (Michael)
- 4mv+b frames encoding finally fixed (Michael)
- chroma ME (Michael)
- 5 comparison functions for ME (Michael)
- B-frame encoding speedup (Michael)
- WMV2 codec (unfinished - Michael)
- user specified diamond size for EPZS (Michael)
- Playstation STR playback subsystem, still experimental (Mike and Michael)
- ASV2 codec (Michael)
- CLJR decoder (Alex)

.. And lots more new enhancements and fixes.


version 0.4.6:

- completely new integer only MPEG audio layer 1/2/3 decoder rewritten
  from scratch
- Recoded DCT and motion vector search with gcc (no longer depends on nasm)
- fix quantization bug in AC3 encoder
- added PCM codecs and format. Corrected WAV/AVI/ASF PCM issues
- added prototype ffplay program
- added GOB header parsing on H.263/H.263+ decoder (Juanjo)
- bug fix on MCBPC tables of H.263 (Juanjo)
- bug fix on DC coefficients of H.263 (Juanjo)
- added Advanced Prediction Mode on H.263/H.263+ decoder (Juanjo)
- now we can decode H.263 streams found in QuickTime files (Juanjo)
- now we can decode H.263 streams found in VIVO v1 files(Juanjo)
- preliminary RTP "friendly" mode for H.263/H.263+ coding. (Juanjo)
- added GOB header for H.263/H.263+ coding on RTP mode (Juanjo)
- now H.263 picture size is returned on the first decoded frame (Juanjo)
- added first regression tests
- added MPEG-2 TS demuxer
- new demux API for libav
- more accurate and faster IDCT (Michael)
- faster and entropy-controlled motion search (Michael)
- two pass video encoding (Michael)
- new video rate control (Michael)
- added MSMPEG4V1, MSMPEGV2 and WMV1 support (Michael)
- great performance improvement of video encoders and decoders (Michael)
- new and faster bit readers and vlc parsers (Michael)
- high quality encoding mode: tries all macroblock/VLC types (Michael)
- added DV video decoder
- preliminary RTP/RTSP support in ffserver and libavformat
- H.263+ AIC decoding/encoding support (Juanjo)
- VCD MPEG-PS mode (Juanjo)
- PSNR stuff (Juanjo)
- simple stats output (Juanjo)
- 16-bit and 15-bit RGB/BGR/GBR support (Bisqwit)


version 0.4.5:

- some header fixes (Zdenek Kabelac <kabi at informatics.muni.cz>)
- many MMX optimizations (Nick Kurshev <nickols_k at mail.ru>)
- added configure system (actually a small shell script)
- added MPEG audio layer 1/2/3 decoding using LGPL'ed mpglib by
  Michael Hipp (temporary solution - waiting for integer only
  decoder)
- fixed VIDIOCSYNC interrupt
- added Intel H.263 decoding support ('I263' AVI fourCC)
- added Real Video 1.0 decoding (needs further testing)
- simplified image formats again. Added PGM format (=grey
  pgm). Renamed old PGM to PGMYUV.
- fixed msmpeg4 slice issues (tell me if you still find problems)
- fixed OpenDivX bugs with newer versions (added VOL header decoding)
- added support for MPlayer interface
- added macroblock skip optimization
- added MJPEG decoder
- added mmx/mmxext IDCT from libmpeg2
- added pgmyuvpipe, ppm, and ppm_pipe formats (original patch by Celer
  <celer at shell.scrypt.net>)
- added pixel format conversion layer (e.g. for MJPEG or PPM)
- added deinterlacing option
- MPEG-1/2 fixes
- MPEG-4 vol header fixes (Jonathan Marsden <snmjbm at pacbell.net>)
- ARM optimizations (Lionel Ulmer <lionel.ulmer at free.fr>).
- Windows porting of file converter
- added MJPEG raw format (input/output)
- added JPEG image format support (input/output)


version 0.4.4:

- fixed some std header definitions (Bjorn Lindgren
  <bjorn.e.lindgren at telia.com>).
- added MPEG demuxer (MPEG-1 and 2 compatible).
- added ASF demuxer
- added prototype RM demuxer
- added AC3 decoding (done with libac3 by Aaron Holtzman)
- added decoding codec parameter guessing (.e.g. for MPEG, because the
  header does not include them)
- fixed header generation in MPEG-1, AVI and ASF muxer: wmplayer can now
  play them (only tested video)
- fixed H.263 white bug
- fixed phase rounding in img resample filter
- add MMX code for polyphase img resample filter
- added CPU autodetection
- added generic title/author/copyright/comment string handling (ASF and RM
  use them)
- added SWF demux to extract MP3 track (not usable yet because no MP3
  decoder)
- added fractional frame rate support
- codecs are no longer searched by read_header() (should fix ffserver
  segfault)


version 0.4.3:

- BGR24 patch (initial patch by Jeroen Vreeken <pe1rxq at amsat.org>)
- fixed raw yuv output
- added motion rounding support in MPEG-4
- fixed motion bug rounding in MSMPEG4
- added B-frame handling in video core
- added full MPEG-1 decoding support
- added partial (frame only) MPEG-2 support
- changed the FOURCC code for H.263 to "U263" to be able to see the
  +AVI/H.263 file with the UB Video H.263+ decoder. MPlayer works with
  this +codec ;) (JuanJo).
- Halfpel motion estimation after MB type selection (JuanJo)
- added pgm and .Y.U.V output format
- suppressed 'img:' protocol. Simply use: /tmp/test%d.[pgm|Y] as input or
  output.
- added pgmpipe I/O format (original patch from Martin Aumueller
  <lists at reserv.at>, but changed completely since we use a format
  instead of a protocol)


version 0.4.2:

- added H.263/MPEG-4/MSMPEG4 decoding support. MPEG-4 decoding support
  (for OpenDivX) is almost complete: 8x8 MVs and rounding are
  missing. MSMPEG4 support is complete.
- added prototype MPEG-1 decoder. Only I- and P-frames handled yet (it
  can decode ffmpeg MPEGs :-)).
- added libavcodec API documentation (see apiexample.c).
- fixed image polyphase bug (the bottom of some images could be
  greenish)
- added support for non clipped motion vectors (decoding only)
  and image sizes non-multiple of 16
- added support for AC prediction (decoding only)
- added file overwrite confirmation (can be disabled with -y)
- added custom size picture to H.263 using H.263+ (Juanjo)


version 0.4.1:

- added MSMPEG4 (aka DivX) compatible encoder. Changed default codec
  of AVI and ASF to DIV3.
- added -me option to set motion estimation method
  (default=log). suppressed redundant -hq option.
- added options -acodec and -vcodec to force a given codec (useful for
  AVI for example)
- fixed -an option
- improved dct_quantize speed
- factorized some motion estimation code


version 0.4.0:

- removing grab code from ffserver and moved it to ffmpeg. Added
  multistream support to ffmpeg.
- added timeshifting support for live feeds (option ?date=xxx in the
  URL)
- added high quality image resize code with polyphase filter (need
  mmx/see optimization). Enable multiple image size support in ffserver.
- added multi live feed support in ffserver
- suppressed master feature from ffserver (it should be done with an
  external program which opens the .ffm url and writes it to another
  ffserver)
- added preliminary support for video stream parsing (WAV and AVI half
  done). Added proper support for audio/video file conversion in
  ffmpeg.
- added preliminary support for video file sending from ffserver
- redesigning I/O subsystem: now using URL based input and output
  (see avio.h)
- added WAV format support
- added "tty user interface" to ffmpeg to stop grabbing gracefully
- added MMX/SSE optimizations to SAD (Sums of Absolutes Differences)
  (Juan J. Sierralta P. a.k.a. "Juanjo" <juanjo at atmlab.utfsm.cl>)
- added MMX DCT from mpeg2_movie 1.5 (Juanjo)
- added new motion estimation algorithms, log and phods (Juanjo)
- changed directories: libav for format handling, libavcodec for
  codecs


version 0.3.4:

- added stereo in MPEG audio encoder


version 0.3.3:

- added 'high quality' mode which use motion vectors. It can be used in
  real time at low resolution.
- fixed rounding problems which caused quality problems at high
  bitrates and large GOP size


version 0.3.2: small fixes

- ASF fixes
- put_seek bug fix


version 0.3.1: added avi/divx support

- added AVI support
- added MPEG-4 codec compatible with OpenDivX. It is based on the H.263 codec
- added sound for flash format (not tested)


version 0.3: initial public release