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Commit 8c8e5d5286bf598a89ef9993a2cf6ea409d03a32 added a way to reduce seek time by waiting for the windowed tcp packets instead of creating a new socket connection. It implemented this by overwriting s->short_seek_threshold in avio_seek(). However, s->short_seek_threshold could already be set and be higher than the threshold set by the protocol (i.e. s->short_seek_threshold is set in ff_configure_buffers_for_index()). This new feature was only enabled for tls connections in 70d8077b795766e2486e6ec8110f22a97362d6d6. As in Ticket #9148 it reduced performance because instead of waiting to refill the AVIOContext buffers with an existing connections, a new HTTP request was often made instead. Fixes Ticket #9148. Reviewed-by: Martin Storsjö <martin@martin.st> Signed-off-by: Andriy Gelman <andriy.gelman@gmail.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 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.
- 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.