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Niklas Haas 9049ea6763 lavfi/vf_libplacebo: set time_base/frame_rate dynamically 
Use the gcd of all input timebases to ensure PTS accuracy. For the
framerate, just pick the highest of all the inputs, under the assumption
that we will render frames with approximately this frequency. Of course,
this is not 100% accurate, in particular if the input frames are badly
misaligned. But this field is informational to begin with.

Importantly, it covers the "common" case of combining high FPS and low
FPS streams with aligned frames.
2023-06-20 17:09:58 +02:00
compat compat: Use '-' instead of '/' for rc.exe options 2023-02-13 13:49:40 +02:00
doc lavfi/vf_libplacebo: add in_idx variable 2023-06-20 17:09:58 +02:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools fftools/ffmpeg: pass subtitle decoder dimensions to sub2video 2023-06-19 09:48:56 +02:00
libavcodec lavc/msrleenc: Add msrle encoder 2023-06-20 14:37:52 +02:00
libavdevice avdevice/decklink_common: Convert to using avpriv_packet_list functions 2023-05-31 00:21:00 +02:00
libavfilter lavfi/vf_libplacebo: set time_base/frame_rate dynamically 2023-06-20 17:09:58 +02:00
libavformat avformat/evcdec: don't set AVCodecParameters.framerate 2023-06-20 11:35:21 -03:00
libavutil hwcontext_vulkan: free temporary array once unneeded 2023-06-15 22:00:41 +02:00
libpostproc version.h: Bump minor post 6.0 branch 2023-02-19 18:37:36 +01:00
libswresample Move bessel_i0() from swresample/resample to avutil/mathematics 2023-05-29 00:45:28 +02:00
libswscale swscale: bump minor for implementing support for the new pixfmts 2023-05-29 00:42:02 +02:00
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tests lavc/msrleenc: Add msrle encoder 2023-06-20 14:37:52 +02:00
tools tools/target_dec_fuzzer: Test lowres 2023-06-06 21:37:53 +02:00
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Changelog lavc/msrleenc: Add msrle encoder 2023-06-20 14:37:52 +02:00
configure avfilter/vf_drawtext: improve glyph shaping and positioning 2023-06-19 22:35:52 +02:00
CONTRIBUTING.md Add CONTRIBUTING.md 2016-09-18 10:02:13 +01:00
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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 lavc/msrleenc: Add msrle encoder 2023-06-20 14:37:52 +02:00
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.