How can I transcode video for 800x480, 16:9 non-square pixel display?

[sofakng]

I've purchased a car stereo that lists the following dimensions:

6.95 in diagonal (156.6 mm x 81.6 mm)
800x480, 16:9 aspect ratio

If the pixels were square, that would be 15:9 but the physical dimensions are definitely 16:9.

If I have a video encoded at 720p or 1080p and I want to convert it to use the entire 800x480 display and the non-square (?) pixels, how can I do this with FFmpeg? (or anything else)

[El Heggunte]

AR = 16:9 => 852x480 or 800x448

[Cornucopia]

156.6 / 81.6 is 1.9191, so definitely not 16:9 (aka 1.78:1).

If you truly trust what it says, you should size as if it was 852x480, but then actually make it the target size.

Scott

[sofakng]

AR = 16:9 => 852x480 or 800x448

If I size the output from 1280x720 to 800x448, won't I be losing 32 pixels on my screen? Shouldn't I be able to fit it 100% since they are both 16:9 aspect ratios?

If you truly trust what it says, you should size as if it was 852x480, but then actually make it the target size.

I'm sorry but can you explain that a bit more? What would the command-line parameters be for FFmpeg? (does the source resolution or aspect ratio matter?)

[El Heggunte]

AR = 16:9 => 852x480 or 800x448

If I size the output from 1280x720 to 800x448, won't I be losing 32 pixels on my screen? Shouldn't I be able to fit it 100% since they are both 16:9 aspect ratios?

Obviously, 800x480 IS NOT 16:9, even if the user's manual states otherwise.

800x480 is 50:30, or 1.666......