mpeg-1 to PSP, 'mismatch for mapping'.

[PiggyWiggy]

Encoding started on Mon Dec 19 16:30:38 CET 2005
Input #0, mpeg, from '/Users/arthur/Desktop/xxx.mpg':
Duration: 00:21:38.6, start: 0.248378, bitrate: 1392 kb/s
Stream #0.0: Audio: mp2, 44100 Hz, stereo, 224 kb/s
Stream #0.1: Video: mpeg1video, 352x240, 29.97 fps
Codec type mismatch for mapping #0.0 -> #0.0

That's the error I get trying to encode mpeg-1 to PSP (normal settings). It doesn't happen with every single file, but I have 2 files that give this error, which is pretty dang annoying ^^.

Anyone any ideas?
Thanks

[major]

"Invert mapping" in the audio tab.

[PiggyWiggy]

That sounds pretty damn logical.. Let's try it out.