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  1. Member
    Join Date
    Feb 2005
    United States
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    I have a bunch of MP4' that I want to change the "perceived" frame size of - ie they are 1280x720, if someone were to look at it in media info I want it to show 640x360 - I'm assuming I'll probably need to use a hex editor but I'm not sure what I'm looking at nor what values I need to change.
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  2. Look for the hex sequence 05 00 02 D0 (1280x720) and change it to 02 80 01 68 (640x360). It will be near the start of the file:

    It may not play properly after doing this.
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