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./ffmpeg -f lavfi -i yuvtestsrc=duration=1:size=1200x1440 \
-s 1200x720 -f null -vframes 100 -pix_fmt $i -nostats \
-cpuflags 0 -v error -
32-bit mul, power8 only.
~6.4x speedup:
rgb24
214278 UNITS in yuv2packedX, 16384 runs, 0 skips
33249 UNITS in yuv2packedX, 16384 runs, 0 skips
bgr24
214616 UNITS in yuv2packedX, 16384 runs, 0 skips
33233 UNITS in yuv2packedX, 16384 runs, 0 skips
rgba
214517 UNITS in yuv2packedX, 16384 runs, 0 skips
33271 UNITS in yuv2packedX, 16384 runs, 0 skips
bgra
214973 UNITS in yuv2packedX, 16384 runs, 0 skips
33397 UNITS in yuv2packedX, 16384 runs, 0 skips
argb
214613 UNITS in yuv2packedX, 16384 runs, 0 skips
33310 UNITS in yuv2packedX, 16384 runs, 0 skips
bgra
214637 UNITS in yuv2packedX, 16384 runs, 0 skips
33330 UNITS in yuv2packedX, 16384 runs, 0 skips
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.
- 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.