mirror of
https://mirror.skon.top/https://github.com/FFmpeg/FFmpeg
synced 2026-04-20 21:00:41 +08:00
a1c4929f65
Some DirectShow devices (Logitech C920 webcam) expose each DirectShow format they support twice, once without and once with extended color information. During format selection, both match, this patch ensures that the format with extended color information is selected if it is available, else it falls back to a matching format without such information. This also necessitated a new code path taken for default formats of a device (when user didn't request any specific video size, etc), because the default format may be one without extended color information when a twin with extended color information is also available. Getting the extended color information when available is important as it allows setting the color space, range, primaries, transfer characteristics and chroma location of the stream provided by dshow, enabling users to get more correct color automatically out of their device. Closes: #9271 Signed-off-by: Diederick Niehorster <dcnieho@gmail.com> Reviewed-by: Roger Pack <rogerdpack2@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 means to alter decoded audio and video through a directed graph of connected 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.