Windows Media Encoder and input mpeg2 file?

[trodas]

Guys, I wonder, what can I do with 720p mpeg2 file to reencode it using Windows Media Encoder as standard wmv file. WME (v9) refuse to open mpeg2 file at all, no matter what extension I choose. So I googled a little and find there:
http://www.trickery.net/vb/showthread.php?t=37998

...a tip, that demultiplexed (eg. video alone and audio alone) might be accepted by WME:

I get errors in WME if I try to encode an .mpg file with MPEG2 video in it, but I if demux the file into separate video and audio files and load them into WME as separate sources it works fine.

So I tried it, demuxint mpeg2 with ffmpeg was easy:

ffmpeg -i input.mpg -vcodec copy -f mpeg2video ES_Video.m2v -acodec copy -f mp2 ES_Audio.mp2

...yet WME never see m2v, files nor to accept them at all.

So I'm stuck.

The only one solution I managed to come up with is a loseless Huff YUV codec and VirtualDub + mpeg2 input filters, that produced from small 6 min file a whoooping 8,2G avi file, witch WME accepted w/o a glitch and converted.
The only one catch by doing things this way is the size of the template file. With anything longer (or higher resolution) it will just go over every imaginable limits for the file size... and I have no idea, if problems did not arise from that.

Anyone got a better idea?

(please, no some questionable converting softwares, the WME 2 passes quality cannot be replaced with anything else, IMHO) ...

[El Heggunte]

Use an Avisynth script + Zambelli's WMCmd.vbs
( http://alexzambelli.com/WMV/#WMCmd )