1e6307f46c
The encode-callback (the callback used by the FF_CODEC_CB_TYPE_ENCODE encoders) is currently called in two places: encode_simple_internal() and by the worker threads of frame-threaded encoders. After the call, some packet properties are set based upon the corresponding AVFrame properties and the packet is made refcounted if it isn't already. So there is some code duplication. There was also non-duplicated code in encode_simple_internal() which is executed even when using frame-threading. This included an emms_c() (which is needed for frame-threading, too, if it is needed for the single-threaded case, because there are allocations (via av_packet_make_refcounted()) immediately after returning from the encode-callback). Furthermore, some further properties are only set in encode_simple_internal(): For audio, pts and duration are derived from the corresponding fields of the frame if the encoder does not have the AV_CODEC_CAP_DELAY set. Yet this is wrong for frame-threaded encoders, because frame-threading always introduces delay regardless of whether the underlying codec has said cap. This only worked because there are no frame-threaded audio encoders. This commit fixes the code duplication and the above issue by factoring this code out and reusing it in both places. It would work in case of audio codecs with frame-threading, because now the values are derived from the correct AVFrame. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.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.