11ff9cb5e9
Often a caller doesn't want the amount of bits written via a PutBitContext, but the amount of bytes. This in particular happens after one has flushed the PutBitContext (e.g. at the end of encoding, when one wants to know the actual packet size). The current way of doing this is with put_bits_count(pb)/8 (or (put_bits_count(pb) + 7)/8). Yet this has some issues: It contains implicit multiplications and divisions by 8 with a cast in between; it obscurs the intent; and it restricts the size of the buffer to (currently) INT_MAX/8 (or to 1/8 of the maximum of whatever put_bits_count() returns), although said restriction is not really necessary for users that don't need a bitcount. Corresponding functions for the amount of bytes left have also been addded. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@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.