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FFmpeg git repo
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Andreas Rheinhardt b31c9b72e5 avformat/matroskadec: Redo level handling 
This commit changes how levels are handled: If the level used for
ebml_parse ends directly after an element that has been consumed, then
ebml_parse ends the level itself (and any known-length levels that end
there as well) and informs the caller via the return value; if the
current level is of unknown-length, then the level is ended as soon as
an element that is not valid on the current level, but on a higher
level is encountered (or if EOF has been encountered).

This is designed for situations where one wants to parse master elements
incrementally, i.e. not in one go via ebml_parse_nest.

The (incremental) parsing of clusters still mixes levels by using a
syntax list that contains elements from different levels and the level
is still ended manually via a call to ebml_level_end if the last cluster
was an unknown-length cluster (known-length clusters are already ended
when their last element is read), but only if the next element is a
cluster, too. A  different level 1 element following an unknown-length
cluster will currently simply be presumed to be part of the earlier
cluster. Fixing this will be done in a future patch. The modifications
to matroska_parse_cluster contained in this patch are only intended not
to cause regressions.

Nevertheless, the fact that known-length levels are automatically ended
in ebml_parse when their last element has been read already fixes a bogus
error message introduced in 9326117b that was emitted when a known-length
cluster is followed by another level 1 element other than a cluster in
which case the cluster's level was not ended (which only happened when
a new cluster has been encountered) so that the length check (introduced
in 9326117b) failed for the level 1 element as it is of course not
contained in the previous cluster. Most Matroska files were affected by
this.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
2019-07-16 16:16:58 -03:00
compat compat/cuda/ptx2c: don't drop final newline 2019-05-24 19:23:39 +02:00
doc doc/codecs: Add missing documentation for nointra 2019-07-15 09:21:33 +08:00
ffbuild Merge commit '7e5bde93a1e7641e1622814dafac0be3f413d79b' 2019-03-10 19:31:13 -03:00
fftools ffmpeg_opt: Respect default disposition when select audio/video 2019-07-03 10:33:44 +08:00
libavcodec avcodec: remove reference to AVPacket's destruct field 2019-07-15 11:20:03 -03:00
libavdevice lavd/avfoundation: Set correct default value 0 for option capture_raw_data. 2019-07-08 20:02:41 +02:00
libavfilter avfilter/vf_hysteresis: use time_base from framesync 2019-07-14 19:14:10 +02:00
libavformat avformat/matroskadec: Redo level handling 2019-07-16 16:16:58 -03:00
libavresample
libavutil avutil/hwcontext_vaapi: move kernel_driver into CONFIG_LIBDRM 2019-07-11 09:34:57 +08:00
libpostproc
libswresample swresample/swresample: check for invalid sample rates 2019-05-26 14:43:32 +02:00
libswscale swscale/tests/swscale: Lengthen pixfmt name buffer to 21 bytes 2019-05-13 13:39:49 +02:00
presets
tests fate: add hls fmp4 segment type test case 2019-07-15 21:57:43 +08:00
tools tools/target_dec_fuzzer: Remove redundant av_free() 2019-07-13 14:42:57 +02:00
.gitattributes
.gitignore tools/python: add script to convert TensorFlow model (.pb) to native model (.model) 2019-07-01 10:23:47 -03:00
.travis.yml Merge commit '899ee03088d55152a48830df0899887f055da1de' 2019-03-14 15:53:16 -03:00
Changelog avformat/movenc: use unspecified language by default 2019-07-12 20:26:38 +02:00
configure avutil/mips: optimize UNPCK&SAD macros with MSA2.0 instruction. 2019-07-10 12:54:57 +02:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md INSTALL.md: Fix Markdown formatting 2019-01-31 10:29:16 -09:00
LICENSE.md LICENSE: Clarify --enable-nonfree. 2019-05-10 01:18:58 +02:00
MAINTAINERS MAINTAINERS: remove myself as mailing list maintainer 2019-03-21 11:34:13 -08:00
Makefile tools: Add fuzzer for demuxers 2019-05-31 22:44:30 +02:00
README.md
RELEASE

README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides a mean to alter decoded Audio and Video through chain of filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
  • ffplay is a minimalistic multimedia player.
  • ffprobe is a simple analysis tool to inspect multimedia content.
  • Additional small tools such as aviocat, ismindex and qt-faststart.

Documentation

The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.

Examples

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process and will be ignored.