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91f1115a0e
At least for vdpau, the hwaccel init code tries to check the video profile and ensure that there is a matching vdpau profile available. If it can't find a match, it will fail to initialise. In the case of wmv3/vc1, I observed initialisation to fail all the time. It turns out that this is due to the hwaccel being initialised very early in the codec init, before the profile has been extracted and set. Conceptually, it's a simple fix to reorder the init code, but it gets messy really fast because ff_get_format(), which is what implicitly trigger hwaccel init, is called multiple times through various shared init calls from h263, etc. It's incredibly hard to prove to my own satisfaction that it's safe to move the vc1 specific init code ahead of this generic code, but all the vc1 fate tests pass, and I've visually inspected a couple of samples and things seem correct. Signed-off-by: Philip Langdale <philipl@overt.org>
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.
- ffserver is a multimedia streaming server for live broadcasts.
- 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.