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4fce3bab64
update_video_stats() currently uses OutputStream.data_size to print the total size of the encoded stream so far and the average bitrate. However, that field is updated in the muxer thread, right before the packet is sent to the muxer. Not only is this racy, but the numbers may not match even if muxing was in the main thread due to bitstream filters, filesize limiting, etc. Introduce a new counter, data_size_enc, for total size of the packets received from the encoder and use that in update_video_stats(). Rename data_size to data_size_mux to indicate its semantics more clearly. No synchronization is needed for data_size_mux, because it is only read in the main thread in print_final_stats(), which runs after the muxer threads are terminated.
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.