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Andreas Rheinhardt 115ac90ec9 avcodec/cbs_mpeg2: Simplify splitting fragment 
avpriv_find_start_code() supports non-contiguous buffers
by maintaining a state that allows to find start codes
that span across multiple buffers; a consequence thereof
is that avpriv_find_start_code() is given a zero-sized
buffer, it does not modify this state, so that it appears
as if a start code was found if the state contained a start code.

This can e.g. happen with Sequence End units in MPEG-2 and
to counter this, cbs_mpeg2_split_fragment() reset the state
when it has already encountered the end of the fragment
in order to add the last unit (if it is only of the form 00 00 01 xy)
only once; it also used a flag to set whether this is the final unit.

Yet this can be improved by simply resetting state unconditionally
(thereby avoiding a branch); the flag can be removed by just checking
whether we have a valid start code (of the next unit to add)
at the end.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-02-08 06:10:08 +01:00
compat Replace all occurences of av_mallocz_array() by av_calloc() 2021-09-20 01:03:52 +02:00
doc avutil/fifo: Deprecate old FIFO API 2022-02-07 00:31:49 +01:00
ffbuild Makefile: Redo duplicating object files in shared builds 2022-01-04 05:01:04 +01:00
fftools ffmpeg: switch to new FIFO API 2022-02-07 00:31:23 +01:00
libavcodec avcodec/cbs_mpeg2: Simplify splitting fragment 2022-02-08 06:10:08 +01:00
libavdevice lavd/jack: switch to the new FIFO API 2022-02-07 00:31:23 +01:00
libavfilter lavfi/vf_deshake_opencl: switch to new FIFO API 2022-02-07 00:31:23 +01:00
libavformat lavf/async: switch to new FIFO API 2022-02-07 00:31:23 +01:00
libavutil avutil: use getauxval(3) for CPU capabilities on linux/android ARM 2022-02-07 13:42:40 -08:00
libpostproc lib*/version.h: Bump Versions after release/5.0 branch 2022-01-04 14:29:06 +01:00
libswresample lib*/version.h: Bump Versions after release/5.0 branch 2022-01-04 14:29:06 +01:00
libswscale swscale/x86/swscale: Remove superfluous and invalid ';' 2022-01-22 17:00:45 +01:00
presets
tests avformat/imf: add IMF CPL with repeated resources to FATE 2022-02-03 04:00:09 +01:00
tools tools/target_dec_fuzzer: Adjust threshold for prores 2021-12-16 21:06:47 +01:00
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.gitignore build: detect Metal.framework and build .metal files 2021-12-18 11:55:47 -08:00
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.travis.yml
Changelog Changelog: Add new <next> line after 5.0 2022-01-05 08:37:55 -03:00
configure avutil: use getauxval(3) for CPU capabilities on linux/android ARM 2022-02-07 13:42:40 -08:00
CONTRIBUTING.md
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LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: add my gpg fingerprint 2021-12-23 09:25:16 +08:00
Makefile Makefile: Redo duplicating object files in shared builds 2022-01-04 05:01:04 +01:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE Bump Versions before release/4.4 branch 2021-03-20 01:01:12 +01:00

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 means to alter decoded audio and video through a directed graph of connected 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.