mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2025-02-04 06:08:26 +02:00
e3c54b549a
Up until now, the Matroska muxer would mark a track as default if it had the disposition AV_DISPOSITION_DEFAULT or if there was no track with AV_DISPOSITION_DEFAULT set; in the latter case even more than one track of a kind (audio, video, subtitles) was marked as default which is not sensible. This commit changes the logic used to mark tracks as default. There are now three modes for this: a) In the "infer" mode the first track of every type (audio, video, subtitles) with default disposition set will be marked as default; if there is no such track (for a given type), then the first track of this type (if existing) will be marked as default. This behaviour is inspired by mkvmerge. It ensures that the default flags will be set in a sensible way even if the input comes from containers that lack the concept of default flags. This mode is the default mode. b) The "infer_no_subs" mode is similar to the "infer" mode; the difference is that if no subtitle track with default disposition exists, no subtitle track will be marked as default at all. c) The "passthrough" mode: Here the track will be marked as default if and only the corresponding input stream had disposition default. This fixes ticket #8173 (the passthrough mode is ideal for this) as well as ticket #8416 (the "infer_no_subs" mode leads to the desired output). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@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.