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ninbura
c2802e520a
A capture device could previously be selected only by index or by name. Both are unreliable when multiple audio/video devices share a name or across reboots. AVFoundation reorders the device indices, and the USB video uniqueID embeds the macOS locationID, which can be reassigned on reboot or replug and can then resolve to a different physical device. Add -video_device_id and -audio_device_id, which take a prefixed identifier: uid:<unique ID> or serial:<USB serial number>. The USB serial number is the only identifier that stays pegged to a given physical unit. For video it is resolved to the device's current locationID via IOKit. For audio it is matched against the uniqueID, which already embeds it. The unique ID covers devices that have no serial, such as virtual camera/audio devices. -list_devices additionally prints each device's uniqueID and USB serial so the values can be discovered. IOKit is detected in configure and used only when available. Signed-off-by: Gabriel Balaich <ffmpeg@ninbura.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.