|author||wm4 <email@example.com>||Wed May 27 12:48:10 2015|
|committer||Michael Niedermayer <firstname.lastname@example.org>||Wed May 27 13:50:04 2015|
avformat/mp3: skip junk at the beginning of mp3 files Apparently it can happen that a mp3 file has junk data between id3 tag and actual mp3 data. Skip this to avoid outputting nonsense timestamps. (Two packets had the same timestamps, because the mp3 parser failed to compute a frame duration.) In this case, the junk consisted of 1044 bytes of zero, which incidentally is the same size as normal mp3 frames in this stream. I suspect the mp3 was edited with some tool which wiped the Xing/LAME headers. Data near the end of the file suggests it was encoded with "LAME3.97", but the normal Xing/LAME headers are missing. So this could be "normal". mpg123 also attempts to skip at least 64KB of junk data by scanning for headers. Signed-off-by: Michael Niedermayer <email@example.com>
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
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.
The offline documentation is available in the doc/ directory.
Coding examples are available in the doc/examples directory.
FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.