In ISO/IEC 13818-2, bit rate is differently determined according to video type

1) MPEG1 Video
 Bit_rate and vbv_delay are set to 3FFFF and FFFF respectively
 to indicate variable bitrate. Other values are for constant bitrate.
 VBV is only defined for constant bit rate operation.
 Ths STD supersedes the VBV model for vbr.

2) MPEG2 Video
 Even if the bitrate is constant, the value of bit_rate may not be the actual bitrate
 since bit_rate need only be an upper bound to that actual bitrate.
 VBV is only defined for variable bit rate operation.
 Constant bit rate is viewed as a special case of vbr.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Timestamp handling of decoded frames are much simpler now.

Fixes #1675.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Documentation includes only the externally visible API of the installed
headers.

Based on a patch by Anton Khirnov <anton@khirnov.net>.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

A sentence was mistakenly inserted in the middle of another sentence.

The packet belongs to lavf, the caller must not free it or access it in
any other way.
No change in practice, since destruct is set to NULL anyway.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Useful for detection of subtitles displayed during foreign language
scenes.

Signed-off-by: Diego Biurrun <diego@biurrun.de>

"mmxext" is a more sensible name and more common in outside projects.

Requested in trac ticket #1857.

It is useful to use bprint to handle a growing buffer
used with another API.

* qatar/master:
  dv1394: Swap the min and max values of the 'standard' option
  rtpdec_vp8: Don't parse fields that aren't used
  lavc: add some AVPacket doxy.
  audiointerleave: deobfuscate a function call.
  rtpdec: factorize identical code used in several handlers
  a64: remove interleaved mode.
  doc: Point to the new location of the c99-to-c89 tool
  decode_audio3: initialize AVFrame
  ws-snd1: set channel layout
  wmavoice: set channel layout
  wmapro: use AVCodecContext.channels instead of keeping a private copy
  wma: do not keep private copies of some AVCodecContext fields

Conflicts:
	libavcodec/wmadec.c
	libavcodec/wmaenc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

This allows overriding the value from outside of the file.

* commit '50a65e7a540ce6747f81d6dbf6a602ad35be77ff': (24 commits)
  vmdaudio: set channel layout
  twinvq: validate sample rate code
  twinvq: set channel layout
  twinvq: validate that channels is not <= 0
  truespeech: set channel layout
  sipr: set channel layout
  shorten: validate that the channel count in the header is not <= 0
  ra288dec: set channel layout
  ra144dec: set channel layout
  qdm2: remove unneeded checks for channel count
  qdm2: make sure channels is not <= 0 and set channel layout
  qcelpdec: set channel layout
  nellymoserdec: set channels to 1
  libopencore-amr: set channel layout for amr-nb or if not set by the user
  libilbc: set channel layout
  dpcm: use AVCodecContext.channels instead of keeping a private copy
  imc: set channels to 1 instead of validating it
  gsmdec: always set channel layout and sample rate at initialization
  libgsmdec: always set channel layout and sample rate at initialization
  g726dec: do not validate sample rate
  ...

Conflicts:
	libavcodec/dpcm.c
	libavcodec/qdm2.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit '8ac0f6767bf63d3e6b308ee6648ff02598b81e03':
  dcadec: allow the decoder to change the channel layout mid-stream
  cook: use av_dlog() for debug logging instead of av_log() with AV_LOG_ERROR
  cook: move samples_per_frame from COOKSubpacket to where it is used
  cook: use av_get_channel_layout_nb_channels() instead of cook_count_channels()
  cook: reverse a condition so that the code makes more sense
  cook: remove unneeded COOKContext variable, sample_rate
  cook: remove unneeded COOKContext variable, bit_rate
  cook: use AVCodecContext.channels instead of keeping a private copy
  bmvaudio: set channel layout at init() rather than validating it
  atrac1: do not keep a copy of channel count in the private context
  dsicinaudio: set channels and channel layout
  g722dec: set channel layout at initialization instead of validating it
  amrwbdec: set channels, channel_layout, and sample_rate
  amrnbdec: set channels, channel_layout, and sample_rate
  dca_parser: allow the parser to change the sample rate
  lavc: check channel count after decoder init
  lavc: move SANE_NB_CHANNELS to internal.h and use it in the PCM decoders

Conflicts:
	libavcodec/dcadec.c
	libavcodec/pcm.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

DV1394_NTSC has a lower value than DV1394_PAL.

Signed-off-by: Martin Storsjö <martin@martin.st>

This avoids warnings about unused variables.

Signed-off-by: Martin Storsjö <martin@martin.st>

right above there is if (pkt) {<do stuff>; pkt = NULL}, so pkt is just a
fancy name for NULL at this point.

It has been disabled since it was added two years ago.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Do not quote second argument to filter{,_out} in check_ld. We want to keep/remove all the space-separated words matching the -l* pattern, not keep everything if the whole argument begins with -l and remove it otherwise.

This also fixes errors like:
./configure: eval: line 418: syntax error near unexpected token `-l*'
./configure: eval: line 418: `case  in -l*) ;; *) echo  ;; esac'
when run with ./configure --enable-openal

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* cus/stable:
  ffplay: remove redundant !codec check
  ffplay: only initialize codec opts before using it
  ffplay: always free buffersink_params in configure_video_filters
  ffplay: remove uneeded format filter, buffersink format is set
  ffplay: check for buffersink_params allocation success
  ffplay: always free inputs and outputs in configure_filtergraph
  ffplay: fill the unused part of the window with black
  ffplay: add update parameter to fill_rectangle

Merged-by: Michael Niedermayer <michaelni@gmx.at>

This location contains prebuilt binaries as well.

Signed-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Same fix and issue as in a25d912dca

Signed-off-by: Anton Khirnov <anton@khirnov.net>

We would crash a moment later anyway if this fails.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes Ticket1811

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

A large invalid value could cause undefined behavior when left-shifted
by 8 later in the function.

channels, sample_rate, bit_rate, and block_align can be used directly from
the AVCodecContext

This could occur due to integer overflow when reading the channel count from
the extradata.