Both libavformat and libavcodec requires this function.

Note that the linebreaks text codec option (but not the feature) has
been removed; its main goal was to allow demuxers to configure the text
decoder (and not meant to be used by users), but the AVOption are not a
viable solution. This is solved differently in this commit.

This commit also makes sure the extradata and subtitle_header are NUL
terminated, without taking into account the trailing '\0' in account in
the size.

At the same time, it should fix 'warning: dereferencing type-punned
pointer will break strict-aliasing rules' warning for compilers who
don't consider uint8_t** and char** compatibles.

The SRT muxer is reponsible for separating events with two line breaks,
there is no need to add more than necessary. Similarly, other muxers
(such as Matroska) are not supposed to add line breaks at the end of the
payload.

This is not necessary anymore since the last commit.

Fix sscanf calls that can't work at the end of a line unless it ends
with \r\n or \n: the markup line may/should/must not end with these
characters.

This is a temporary workaround until all filters have been
upgraded to filter_frame and the framework can forget completely
about start_frame/draw_slice/end_frame.

Wrong code was commited in 64f4fb75c4.

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

Reviewed-by: Nicolas George <nicolas.george@normalesup.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

Avoid duplication, and point to the complete description of options.
Also provide a more complete specification of the supported syntax.

* qatar/master:
  snow: use VideoDSPContext

Conflicts:
	libavcodec/snow.c

Nothing merged here, this has already been fixed in ffmpeg long ago

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

* commit '30a76487304e7250294c9c0e9fa179bf07fd822a':
  hlsenc: make segment number unsigned
  hlsenc: make EXT-X-MEDIA-SEQUENCE always increase

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

* commit '9b1370aced385698bc783747917544ab69ecb373':
  hlsenc: do not add timestamps in different timebases
  hlsenc: use the correct AV_TIME_BASE macro

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

* commit '0448f26c97c5ab4858d31e456a4f1738ae783242':
  hlsenc: keep the playlist to the correct number of items
  hlsenc: use the segment filename in the playlist entry

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

* commit '6dd93ee6f1b050ad7c4b247899e83efa293ee405':
  hlsenc: check append_entry return value
  hlsenc: use the basename to generate the list entries
  avstring: add av_basename and av_dirname

Conflicts:
	Changelog
	doc/APIchanges
	libavutil/version.h

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

This breaks the sed in configure:find_things(). Fixes regression from
c73c87b. Fixes Ticket2079.

Found-by: jamal

This is consistent with the other ff_ass_split_* functions.

It also fixes a crash when trying to split a dialog with text=NULL
(which seems to happen when the text of the dialog is empty); basically,
this commit fixes crashes when trying to encode an empty text subtitle
dialog (see subrip and mov_text encoders).

Fixes Ticket2048.

Based on patch by Akihiro Tsukada

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

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

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

This reverts 79f80f5c, moves postproc along with the other libraries,
and fix the postproc dependency to libavutil.

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

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

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

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

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

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

Reviewed-by: Nicolas George <nicolas.george@normalesup.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Some wav files report a data size that is bigger than the actual file size.
Fall back to estimation from bitrate in such cases.

Fixes ticket #2065.

Signed-off-by: James Almer <jamrial@gmail.com>

It was left over from the initial conversion.

It will overflow if somebody keeps streaming for a time long enough.

start_time is in stream timebase units while end_time is
in AV_TIME_BASE ones.

Consider the corner case with a list size larger than the wrap
number.

recording_time is in AV_TIME_BASE units.

Avoid calling av_get_frame_filename twice, once to generate the
segment filename and once to generate the playlist.

The segment path is desumed from the playlist path, recording a
relative path in the playlist while serving the file could lead
to misleading results.

Thread safe version of the common basename and dirname.

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

* qatar/master:
  cosmetics: Prettyprint codec/format/filter registration files

Conflicts:
	libavcodec/allcodecs.c
	libavdevice/alldevices.c
	libavfilter/allfilters.c
	libavformat/allformats.c

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

* commit '69583bd3b1eba471366141c945030c163e073e02':
  avfilter: Refactor unconditional filter registration
  build: Add rtpenc_chain extra config option
  configure: Add --disable-all command line option

Conflicts:
	libavfilter/allfilters.c
	libavformat/Makefile

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

* cus/stable:
  ffplay: fix type of time_diff in waveform display
  ffplay: always display audio visualization if mode is set
  ffplay: hide cursor on no mouse movement
  ffplay: reset external clock to unknown on start
  ffplay: only drop frames if not in frame step mode
  ffplay: move frame step pause from the video thread to video_refresh

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