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Jan Ekström 1931761f18 avformat/movenc: implicitly enable negative CTS offsets for ismv 
ISMV lacks any sort of edit list support, as well as tfxd is
effectively the PTS of the fragment for most intents and purposes.

Thus, if b-frames are requested without negative CTS offsets you
end up with N frames' worth of delay (tfxd PTS plus the CTS offset
of the first sample). Negative CTS offsets enable the first sample
to have CTS=DTS, and thus a/v desync due to b-frame reorder delay
is avoided.
2018-08-24 21:00:05 +03:00
compat compat: remove in-tree NVidia headers 2018-02-27 16:22:12 +01:00
doc avformat/movenc: implicitly enable negative CTS offsets for ismv 2018-08-24 21:00:05 +03:00
ffbuild Merge commit '17b6c7efb471e8ff1b8a7271f6531ba1d52bf69c' 2017-11-12 01:02:02 -03:00
fftools ffmpeg: simplify refcounting packets for the muxing queue 2018-08-07 18:42:35 -03:00
libavcodec avcodec/libopusenc: support encoding packets of sizes bigger than 60ms 2018-08-24 13:21:09 -03:00
libavdevice avdevice/decklink_enc: print preroll and buffer size 2018-08-24 10:15:32 +05:30
libavfilter avfilter/buffersrc.h: fix typo of the comment 2018-08-21 15:44:33 +08:00
libavformat avformat/movenc: implicitly enable negative CTS offsets for ismv 2018-08-24 21:00:05 +03:00
libavresample avresample: remove deprecated attribute from the AVAudioResampleContext struct 2018-01-09 10:56:53 -03:00
libavutil avutil/encryption_info: Fix size calculation. 2018-08-15 01:33:45 +02:00
libpostproc Bump minor versions after release/4.0 branching 2018-04-16 12:35:12 +02:00
libswresample swresample/swresample: Fix input channel count in resample_first computation 2018-07-26 02:42:42 +02:00
libswscale swscale/swscale : small cosmetic 2018-08-22 11:36:15 +02:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests avformat/movenc: implicitly enable negative CTS offsets for ismv 2018-08-24 21:00:05 +03:00
tools tools/qt-faststart: Allow free atoms after moov atom. 2018-08-01 00:49:54 +02:00
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Changelog avcodec: add IMM4 decoder 2018-08-21 11:52:06 +02:00
configure configure: do not add fsanitize cflags with ossfuzz if coverage is tested 2018-08-23 16:00:26 +02:00
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MAINTAINERS MAINTAINERS: add myself to MIPS section 2018-08-08 01:00:10 +02:00
Makefile avcodec/parser: move parsers list and related API to its own file 2018-07-21 16:08:29 -03:00
README.md Remove the ffserver program 2018-01-06 18:31:37 +00:00
RELEASE RELEASE: update for git after 3.4 branchpoint 2017-10-11 02:46:23 +02:00

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 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.