I've just written a script that extracts single audio tracks from VP6 videos with multiple audio tracks as VGM Toolbox doesn't support these. The resulting file is a EA mus file but with changed block headers. I've also written a script that corrects these headers. However, the resulting file isn't playable. The time is correct but there's no audio.
Here's an example from Medal of Honor: Warfighter (PS3):https://mega.nz/#!C1MQVagY!sByV6F8cMDqb ... nOY-VOdsvU
I have once done something similar with the movie files from Dante's Interno but these are stereo so it worked fine. As far as I can see, the difference is in the header which is size 0x38 in multichannel files. Maybe this has something to do with vgmstream?
Help is very appreciated!