I found a way to convert
mp4 and
m4v files into
AMV. These are common formats for video podcasts.
You will need:
AMV Convert Tool 4 mod (Other versions may work too)
Ffdshow Tryouts
Haali Meda Splitter (click
MatroskaSplitter on the right)
First install
ffdshow. Add
amvtransform.exe to the list of applications for both
Video and
Audio
Next install
Haali Meda Splitter. Uncheck everything but
"Enable MP4 support."
Now open your mp4 or m4v file in AMV Converter. Your file will not show up unless you change "Files of type" to "All file(*.*)"
I hope this helps. This method may work to convert other unsupported formats too, but I have not tested it with anything else.