avi to mpeg - changing size proportionally?

[lerxst]

Not sure if this is a Conversion or an Authoring topic but here it goes:

I have a 640x368 avi file, which I converted to 720x480 mpeg2, using TMPGEnc.

When I loaded the mpeg2 file into TMPGEnc DVD Author, the DVD output I got is a vertically streched image (it is not well proportioned).

I then converted again, this time at 720x414 (to keep proportions, 640=720 and 368=414) but when I load it into TMPGEnc DVD Author it tells me that that is not a valid size for a DVD.

Because the source avi file is not sized to perfectly fit a 4:3 display, what I would like to get on my authored DVD is a proportionally sized video, with black stripes at the top and bottom to fill in the "unused space" (letterboxed?), just like in the widescreen DVD movies.

How can I obtain this?
Thanks in advance for any guidance.

[reboot]

Load the video into tmpgenc.
Select NTSC 720x480 on the Settings tab.
On the Advanced tab, select source 1:1 VGA, and Keep Aspect Ratio 2.
This will then let tmpgenc encode it letterboxed, yet full width for your 4:3 TV.

[lerxst]

Thanks reboot. It worked!

Unfortunately I now realize that the tmpgenc converted file, although well proportioned in size now, does not have audio. Strange because if I convert using another tool such as winavi, the converted file does have audio. But, this winavi converted file now has the same original problem of the vertically streched image.

Any idea why the tmpgenc avi->mpeg file does not capture audio?

Any idea of the settings required in winavi to encode in letterboxed format to fit the 4:3 TV screen size?

Thanks again.

[Krispy Kritter]

Just extract the audio first and convert to DVD spec. Then set up tmpgenc using your video settings for your conversion and choose your converted audio file as the audio source.