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Also remove pthread_cond_broadcast(progress_cond) on uninit. Broadcasting it is not required because workers are always parked when they are not in thread_execute. So it is imposible that a worker is waiting on progress_cond when uninitialized. Benchmark: ./ffmpeg -threads $threads -thread_type slice -i 10slices.mp4 -f null null threads=2: old: 70.212s 70.525s 70.877s new: 65.219s 65.377s 65.484s threads=3: old: 65.086s 66.306s 66.409s new: 63.229s 65.026s 65.116s threads=4: old: 60.993s 61.482s 62.123s new: 59.224s 59.441s 59.667s threads=5: old: 57.576s 57.860s 58.832s new: 53.032s 53.948s 54.086s Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
FFmpeg README
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodecprovides implementation of a wider range of codecs.libavformatimplements streaming protocols, container formats and basic I/O access.libavutilincludes hashers, decompressors and miscellaneous utility functions.libavfilterprovides a mean to alter decoded Audio and Video through chain of filters.libavdeviceprovides an abstraction to access capture and playback devices.libswresampleimplements audio mixing and resampling routines.libswscaleimplements 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.
- ffserver is a multimedia streaming server for live broadcasts.
- Additional small tools such as
aviocat,ismindexandqt-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.