Ticket #1258 (open enhancement)
Codec support request : MPEG Multichannel Audio
|Reported by:||aquarat||Owned by:|
|Blocking:||Reproduced by developer:||no|
|Analyzed by developer:||no|
Support for MPEG Multichannel audio seems to be missing. This is different to ac3. More information can be found here : http://en.wikipedia.org/wiki/MPEG_Multichannel
It's a method of encoding surround audio into stereo mpeg2 files. If the files are played back using software that doesn't support the extra channels, the data is dropped and only the first two channels are decoded.
This codec forms part of the HDV specification (specifically the 4 channel audio option on some HDV camcorders). The Canon XLH1, in particular, made use of this system.
I have found a very old project called mctoolamed : http://mctoolame.sourceforge.net which can decode this codec.
mctoolamed has several issues; it doesn't make provision for sample rates other than 44.1kHz and it also only supports 2,6 and 8 channel files (HDV cameras shoot 4 channels).
- Keywords mp2 added; mpeg mctoolame multichannel removed
- Priority changed from normal to wish
- Status changed from new to open
- Component changed from FFmpeg to avcodec
- Version changed from unspecified to git-master