This was not observed earlier because the only syntax element which it normally misses with the current setup is slice_qp_delta, but that is always going to be zero (in IDR frames QP isn't varied on the slice) which will always exp-golomb code as a single 1 bit. The immediately following part is the byte alignment, which is always a 1 bit followed by 0s which are ignored, so as long as the bitstream is never aligned at that point we will never notice because the only difference is that an ignored bit is a 1 instead of a 0.
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Libav
Libav is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodec
provides implementation of a wider range of codecs.libavformat
implements streaming protocols, container formats and basic I/O access.libavutil
includes hashers, decompressors and miscellaneous utility functions.libavfilter
provides a mean to alter decoded Audio and Video through chain of filters.libavdevice
provides an abstraction to access capture and playback devices.libavresample
implements audio mixing and resampling routines.libswscale
implements color conversion and scaling routines.
Tools
- avconv is a command line toolbox to manipulate, convert and stream multimedia content.
- avplay is a minimalistic multimedia player.
- avprobe is a simple analisys tool to inspect multimedia content.
- Additional small tools such as
aviocat
,ismindex
andqt-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
Conding examples are available in the doc/example directory.
License
Libav codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.
Description
Languages
C
90.4%
Assembly
7.7%
Makefile
1.3%
C++
0.2%
Objective-C
0.2%
Other
0.1%