I noticed a similar thread to this one with someone who was using Vegas 6.0. My problem is this... I am trying to render out .mp4 using, ideally using Main Concept, for incorporation into a After Effects-->Vegas-->Flash/Internet work flow.

Unfortunately when I select MainConcept AVC/AAC from the pull down it renders something that is 320x 240 (I'm trying to render 1280x720). The pull down under template only give me options for two different size options for ipod video.

Similarly the Sony AVC/AAC settings give me a few more options under the template pull down menu but none of them provide full screen SD much less HD. I could render out an uncompressed quicktime but I'm fairly certain Flash needs an .mp4 file to stream HD. I could be wrong though.

Anyone have any suggestions?