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)
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AR = 16:9 => 852x480 or 800x448
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.
FFmpeg? (does the source resolution or aspect ratio matter?)