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Jan Ekström 70405dd7e3 ffmpeg: return no chosen output if an uninitialized stream is unavailable 
Otherwise the rate emulation logic in `transcode_step` never gets
hit, and the unavailability flag never gets reset, leading to an
eternal loop with some rate emulation use cases.

This change was missed during the rework of ffmpeg.c, in which
encoder initialization was moved further down the time line in
commit 67be1ce0c6 . Previously,
as the encoder initialization had happened earlier, this state was
not possible (flow getting as far as hitting the rate emulation logic,
yet not having the encoder initialized yet).

Fixes #9160

(cherry picked from commit ec20b81302)
2021-05-13 18:12:02 +03:00
compat compat/cuda: correct ushort4 to use ushort 2021-02-22 17:03:52 +01:00
doc Update versions for 4.4 2021-03-20 01:01:12 +01:00
ffbuild ffbuild/common: Make deletion of templates possible 2021-02-07 09:45:04 +01:00
fftools ffmpeg: return no chosen output if an uninitialized stream is unavailable 2021-05-13 18:12:02 +03:00
libavcodec avcodec/h263, h263data: Move ff_h263_init_rl_inter to h263.c 2021-05-12 07:03:32 +02:00
libavdevice Bump Versions before release/4.4 branch 2021-03-20 01:01:12 +01:00
libavfilter avfilter/overlay_cuda: check av_buffer_ref result 2021-04-11 10:22:57 +02:00
libavformat avformat/mpegts: add missing sample_rate value to Opus extradata 2021-05-02 20:54:59 -03:00
libavresample
libavutil avutil/cpu: Use HW_NCPUONLINE to detect # of online CPUs with OpenBSD 2021-04-24 09:24:03 +02:00
libpostproc Bump Versions before release/4.4 branch 2021-03-20 01:01:12 +01:00
libswresample libswresample/audioconvert: Fix undefined NULL + 0 2021-04-02 21:39:54 +02:00
libswscale libswscale/x86/yuv2yuvX: Removes unrolling for mmx and mmxext 2021-04-03 19:43:39 +02:00
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tests avformat/mpegts: add missing sample_rate value to Opus extradata 2021-05-02 20:54:59 -03:00
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RELEASE_NOTES RELEASE_NOTES: Based on the version from 4.3 2021-04-08 22:55:16 +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.