by Qyot27 » Wed Sep 16, 2009 3:38 pm
The point of that thread was making the MKV files usable by opening them with AviSynth. Similarly, just swap out 'MKV' in those examples with 'MP4'. The way both are handled is the same. Open the MP4 with AviSynth using FFVideoSource, use VirtualDub to output to a lossless AVI file, and then give that to your WMV encoder.
As for doing WMV encoding right, the options are pretty much limited to just Microsoft products (unless ffmpeg has magically gained VC-1 encoding capability):
Windows Movie Maker (free)
Windows Media Encoder (just the encoder itself, free)
Expression Encoder (the newest addition, but the downside is that you have to buy it; there is a free trial, though)