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  1. Member
    Join Date: Dec 2003
    Location: United States
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    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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  2. vanished El Heggunte's Avatar
    Join Date: Jun 2009
    Location: Misplaced Childhood
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    AR = 16:9 => 852x480 or 800x448
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  3. Member Cornucopia's Avatar
    Join Date: Oct 2001
    Location: Deep in the Heart of Texas
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    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
    "When will the rhetorical questions end?!" - George Carlin
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  4. Member
    Join Date: Dec 2003
    Location: United States
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    Originally Posted by El Heggunte View Post
    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?

    Originally Posted by Cornucopia View Post
    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?)
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  5. vanished El Heggunte's Avatar
    Join Date: Jun 2009
    Location: Misplaced Childhood
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    Originally Posted by sofakng View Post
    Originally Posted by El Heggunte View Post
    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......
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