Posted: 4/14/2009 3:20 PM
Post subject: Nestopia NSV files, Technical Details
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escplan9
Joined: 4/14/2009
Posts: 1
Hello, I've read articles here on analyzing movie files like FMV using hex editors. However, I haven't been able to find any information on analyzing Nestopia's NSV files. Is anyone familiar enough with the NSV files to know or be able to figure out what hex values represent what? The reason I'm doing this is a project I'm working to assist with a Tecmo Super Bowl league I am part of. We want to be able to analyze movie files produced by Nestopia during a two-player game to determine if someone cheated by using turbo. If you compare the turbo pressings to regular tapping of a button, you will find a lot more regularity with the pressing of buttons using turbo since it's automated. To those knowledgeable enough about the technical details about NSV files... what I need to know is: * How many bytes is at the header of the file before the first frame of input is recorded? * What would the 'A' button be represented as in hex? Also if possible, what each of the buttons would be represented as in hex. * When someone presses the turbo button (that you assigned under input), is that recorded on NSV as a separate hex value? Would it basically show up as hitting a separate button than 'A'? This would make it much easier to detect the usage of turbo. Thank you for any and all assistance in advance!
Posted: 4/24/2009 3:03 PM
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klmz
Editor, Emulator Coder, Expert player (2156)
Joined: 5/22/2007
Posts: 1134
Location: Glitchvania
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I don't know about NSV files at all, but I think you can make two (or more) similar and short movie files, one with turbo and one without turbo, for comparation.
<klmz> it reminds me of that people used to keep quoting adelikat's IRC statements in the old good days <adelikat> no doubt <adelikat> klmz, they still do