Export as.mpg or .mpeg file in imovie Hd

What kind of mpeg are you trying to export to?

The standard format of a DVD is mpeg2. Why not use that?

I'm actually trying to export to MPG too so I can load clips on to my site, which runs Gallery2. The FFMPEG graphics toolkit only supports thumbnails for the following MIME types: video/mpeg (mpg mpeg mpe), video/x-flv (flv), video/x-ms-asf (asf), video/x-ms-wmv (wmv), video/x-msvideo (avi).

The AVI files look horrible, and the WMV files only get about 30 seconds or so in (plus a few other issues - that's MS for ya :)). I have Gallery set to assign a default thumbnail for .MOV and .MP4, but it'd be really nice to have the thumbnail taken from the clip.

Apple's Compressor has an mpeg-1 and 2 setting, but I've never used it. Your issue with Flip4Mac is that you are using it in trial mode. Only gives you 30 seconds, plus, sometimes, adds a watermark.
Another thing I have not tried is a conversion site HERE, but I don't know what their limitations are. If anyone on this thread uses it, post back with how it worked.

I did figure out the WMV issue with Flip4Mac after reading a few more threads after I posted the question.

I tried the conversion site but both attempts (one to convert to MPG and one to WMV) produced a clip that started out gray for the first 5 seconds. I have a 7 second title screen that has a black background and turquoise text - both look really gray for 5 seconds before it clicks into full color. The original MP4 looks fine.

I don't have Final Cut/Compressor, so I may have to pay for the Flip4Mac upgrade.

BTW - sorry for taking over your thread, OP. Hopefully my questions help you out too!