FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
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.
- 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,ismindexandqt-faststart.
The offline documentation is available in the doc/ directory.
The online documentation is available in the main website and in the wiki.
Coding examples are available in the doc/examples directory.
FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.
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.
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Currently supported formats: NV12, YUV420P, YUV444P, P010, P016, and YUV444P16
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Using Platform 0 (CPU)
$ time ffmpeg -init_hw_device opencl=ocl:0.0 -filter_hw_device ocl -i sample.mp4 -vf "format=nv12,hwupload,thumbnail_opencl,hwdownload,format=nv12" -y thumbnail.mp4
5.41s user 0.23s system 449% cpu 1.254 total- Using Platform 1 (GPU)
$ time ffmpeg -init_hw_device opencl=ocl:1.0 -filter_hw_device ocl -i sample.mp4 -vf "format=nv12,hwupload,thumbnail_opencl,hwdownload,format=nv12" -y thumbnail.mp4
1.53s user 0.21s system 178% cpu 0.972 total