TMPGenc Aspect Ratio Problems

Discussion in 'MPEG-1 and MPEG-2 encoding (AVI to DVD)' started by Tagg, Apr 6, 2006.

  1. Tagg

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    I'm using TMPGenc (Xpress) to convert an AVI file to DVD MPEG-2 (specifically 16:9, NTSC). The problem is, the AVI video is in an incorrect aspect ratio of 640x352, and I need to convert this to a 624x352 (1.78) ratio on the DVD.

    Naturally, I cannot directly do the math with TMPGenc, because the aspect of 720x480 isn't actually what the DVD converts to for viewing. Normally, I just use the "Full Screen: Keep Aspect Ratio" option. However, I cannot do that with this (because the source file is the incorrect AR), and I cannot figure out what the 720x480 ratio should be. I've come up with 702x480, but I'm not sure if this is correct...

    Can anyone help?

    Thanks.
     
    Tagg, Apr 6, 2006
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  2. aldaco12

    aldaco12 Active member

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    I disagree with you.

    A trick which can [bold]always[/bold] be applied:
    1) have VirtualDub's frameserver installed (double click on auxsetup.exe, in VirtualDub's directory and click on 'install handler')
    2) open your AVI with VirtualDub
    3) Do Video___Filter___Add --> Resize and configure it this way:
    New Width: X'=720 (standard DVD's width)
    New Height: Y'=(720/X)*Y (720/640*352 in your case) = 396
    Filter Mode: Lanczos3 (for me it's the best. Probably also 'Precise Bicubic' is good, but I feel very fine with the Lanczos filter)
    4) check 'expand frame and litterbox image' and set
    Frame Width: 720 (NTSC standard)
    Frame Height: 480 (NTSC standard; it would be 576, for PAL).
    By default it will be filled black, which is very fine. --> [OK]
    5) Do File___Start Frameserver and save 'movie.vdr' as frameserver, keeping VirtualDub hidden in the system's tray.
    6) Load movie.vdr instead of movie.avi with your favorite encoder (maybe you'll have to enter '*.*' or the 'movie.vdr' manually, if the application looks for a video file by default)
     
    Last edited: Apr 7, 2006
    aldaco12, Apr 7, 2006
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  3. rebootjim

    rebootjim Active member

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    Even easier. Set (on advanced tab) source 1:1 VGA, keep aspect ratio 2.
    Set (on video tab) 720x480 4:3 display.
    Tmpgenc will letterbox it correctly.
     
    rebootjim, Apr 7, 2006
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  4. Tagg

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    Thanks for the help, guys. =)

    aldaco, I think your method will work, but I'd have to use 720x406 to get it into a 1.78 ratio (this is correct, right?).

    And rebootjim, I'm not sure that they will work for me, because the source file does have the correct AR (and I want to convert to a 16:9 DVD file).
     
    Last edited: Apr 7, 2006
    Tagg, Apr 7, 2006
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