Help, TMPGEnc "can't open, or unsupported"

[tay666]

Trying to convert an AVI to MPG to burn to VCD.
Using TMPGEnc, but it won't open the file.
I know this is probably a codec probelm, but which codec do I need?
Here is what AVIcodec says about the file

Video : 94 Mb, 311 Kbps, 12.500 fps, res. 352*288 (4:3), MP43 = MS MPEG4 V3, Supported
Audio : 17.2 Mb, 56 Kbps, 24000 Hz, 2 chan., 0x55 = MPEG Layer-3, Supported

Strange thing is, I can play it fine with Windows Media Player 2, so shouldn't I have the codecs alread?

Any suggestions on what to try? I don't want to just go installing a bunch of codecs if I don't need them.
Thanks.

[roach76]

Click TMPGEnc's 'VFAPI Plug-in' TAB under 'Environmental Settings' and try increasing the priority of the 'DirectShow Multimedia File Reader'

[tay666]

Thanks.
That seems to have done the trick.
I'll know for sure in the morning after the file is done.