Render to HD compatible Apple TV format

You must produce h264/MP4 files with the following specifications:

Video formats supported

* H.264 and protected H.264 (from iTunes Store): Up to 5 Mbps, Progressive Main Profile (CAVLC) with AAC-LC audio up to 160 Kbps (maximum resolution: 1280 by 720 pixels at 24 fps, 960 by 540 pixels at 30 fps) in .m4v, .mp4, and .mov file formats
* iTunes Store purchased video: 320 by 240 pixels or 640 by 480 pixels
* MPEG-4: Up to 3 Mbps, Simple Profile with AAC-LC audio up to 160 Kbps (maximum resolution: 720 by 432 pixels at 30 fps) in .m4v, .mp4, and .mov file formats

Audio formats supported

* AAC (16 to 320 Kbps); protected AAC (from iTunes Store); MP3 (16 to 320 Kbps); MP3 VBR; Apple Lossless; AIFF; WAV

Not sure the Vegas suite can do any of that. Your best bet might be to do initial edits with that and then transcode to an AppleTV format. Have a look at MPEGStreamclip for Windows at squared5.com, free utility for video conversion, Mac version has an AppleTv preset, not sure if the Window one does.

AC

Also, if you have get a movie format that will playback in iTunes on the PC, then you should be able to right click on the file and choose a convert to AppleTV option.

AC