e14cdf9990
Previously, the bitrate advertised in the master playlist would only be based on the nominal values in either AVCodecParameters bit_rate, or via AVCPBProperties max_bitrate. On top of this, a fudge factor of 10% is added, to account for container overhead. Neither of these bitrates may be known, and if the encoder is running in VBR mode, there is no such value to be known. And the container overhead may be more or less than the given constant factor of 10%. Instead, calculate the maximum bitrate per segment based on what actually gets output from the muxer, and average bitrate across all segments. When muxing of the file finishes, update the master playlist with these values, exposing both the maximum (which previously was a guesstimate based on the nominal values) via EXT-X-STREAM-INF BANDWIDTH, and the average via EXT-X-STREAM-INF AVERAGE-BANDWIDTH. This makes it possible to use the hlsenc muxer with VBR encodes, for VOD style muxing. Signed-off-by: Martin Storsjö <martin@martin.st>
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.