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Anton Khirnov 0ed1eeb744 lavf/dv: use a more granular timebase for audio 
One that is fine enough to represent all DV audio sample rates. Audio
packet durations are now sample-accurate.

This largely undoes commit 76fbb0052d. To
avoid breaking the issue fixed by that commit, resync audio timestamps
against video if they get more than one frame apart. The sample from
issue #8762 still works correctly after this commit.

Slightly changes the results of the lavf-dv seektest, due to the audio
timebase being more granular.
2023-05-02 10:57:21 +02:00
compat compat: Use '-' instead of '/' for rc.exe options 2023-02-13 13:49:40 +02:00
doc avfilter/af_anlms: improve documentation and extend option 2023-05-01 20:07:06 +02:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools fftools/ffmpeg_filter: fix leak of AVIOContext in read_binary() 2023-04-28 13:46:13 -03:00
libavcodec lavf/dv: use a more granular timebase for audio 2023-05-02 10:57:21 +02:00
libavdevice avdevice/decklink_enc: fix operator precedence in create_s337_payload 2023-04-24 23:00:50 +02:00
libavfilter avfilter/af_anlms: improve documentation and extend option 2023-05-01 20:07:06 +02:00
libavformat lavf/dv: use a more granular timebase for audio 2023-05-02 10:57:21 +02:00
libavutil lavu/hwcontext_qsv: Update after adding support for VAAPI on Windows 2023-04-24 13:24:41 +08:00
libpostproc version.h: Bump minor post 6.0 branch 2023-02-19 18:37:36 +01:00
libswresample swresample/swresample: add a used channel layout option using the new API 2023-02-19 18:28:45 -03:00
libswscale version.h: Bump minor post 6.0 branch 2023-02-19 18:37:36 +01:00
presets
tests lavf/dv: use a more granular timebase for audio 2023-05-02 10:57:21 +02:00
tools tools/target_dec_fuzzer: Adjust threshold for rka 2023-05-01 00:48:32 +02:00
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.travis.yml Merge commit '899ee03088d55152a48830df0899887f055da1de' 2019-03-14 15:53:16 -03:00
Changelog avfilter: add arls filter 2023-04-30 11:34:35 +02:00
configure lavu/hwcontext_vaapi: Add Windows/VAAPI support with vaGetDisplayWin32 2023-04-24 13:24:41 +08:00
CONTRIBUTING.md
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CREDITS Use https for repository links 2023-03-01 21:59:10 +01:00
INSTALL.md INSTALL.md: Fix Markdown formatting 2019-01-31 10:29:16 -09:00
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: add maintainer for the imf demuxer 2023-02-13 18:41:22 +01:00
Makefile tools: add an AV_CODEC_CAP_ENCODER_RECON_FRAME test tool 2023-03-28 13:00:42 +02:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE RELEASE: update after 5.1 branch 2022-07-13 00:31:42 +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 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.