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923586a58f
x4 - x10 faster. Inside print_enabled components, the filter_list case invokes sed about 350 times to parse the same source file and extract different info for each arg. This is never instant, and on systems where fork is slow (notably MSYS2/Cygwin on windows) it takes many seconds. Change it to use sed once on the source file and set env vars with the parse results, then use these results inside the loop. Additionally, the cases of indev_list and outdev_list are very infrequent, but nevertheless they're faster, and arguably cleaner, with shell parameter substitutions than with command substitutions. Tested-by: Michael Niedermayer <michael@niedermayer.cc> Tested-by: Helmut K. C. Tessarek <tessarek@evermeet.cx> Tested-by: Dave Yeo <daveryeo@telus.net> Tested-by: Reino Wijnsma <rwijnsma@xs4all.nl> Signed-off-by: James Almer <jamrial@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.
- 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.