David,

Cineform AHD comes with a pre-set to export the PPRo timeline to 1280x720 m2t, which is fine for video projectors.

But what if the resulting video is to be presented on LCD monitor driven by PC video card's DVI output, for instance via Video Overlay method. (Playback is via Elecard player and alike.)

When 1280x720 is played this way, it looks of course stretched on LCD monitor, as 720 pixels are filling 768 pixel space. This is because PC monitors all have 1280x768 standard resolution.

Therefore, if we need our resulting video to show correctly on LCD monitor, we need the video file resolution to match the LCD's 1280x768 resolution pixel-for-pixel.

How to do this in PPro+AHD, while preserving correct proportions?

Thanks.

Generally you don't want to encode video to match a particular PC resolution. Your video card should be able to handle the square pixel image and automatically letterbox any additional pixels to black. For example, my home LCD is the more standard 1280x1024, yet the image is represented correctly as 1280x720 (top and bottom are black) even using MediaPlayer. So from within Premiere/AspectHD simply export using "Export Movie" selecting "CineForm HD Export" and produce a stand 1280x720 AVI file. You can create many other sizes, it is just not needed for normal display purposes.