fps of .avi file is 12.500 ???

[chrsiservices]

Okay Ive been following a .avi to svcd tutorial that is very good and has been working very well. However at the step im at i am working in TMPGEnc and im told choose:

NTSC if the frames per second (fps) is 29.97.
NTSC Film if the frames per second (fps) is 23.976
PAL if the frames per second (fps) is 25.

But, all the programs ive used to evaluate my .avi (AVIcodec and VirtualDub) say that its fps is 12.500. What does that number mean, is it possible, and what setting shoud i choose in TMPGEnc ??? (NTSC NTSC Film or PAL?). ANy help greatly appreciated

(Exact stats for the file I got were: 720x336, 12.500 fps (80000 us)

[xtreemkareem]

Sometimes people with lousy capture cards or who are too stupid to capture at a high enough resolution or framerate will capture at HALF of the source framerate (as opposed to lowering resolution) so as to have fewer dropped frames. For some slow animations, the difference between native framerate and half of that fraerate isn't all that noticable except in fast motion or transitions where the video will appear jerky. I download some TV episodes unfortunately captured at 12 fps (source is FILM) or 15 fps (source is NTSC). Just multiply by two. In your case 12.5 X 2 = 25 fps, indicating that your source should proably be encoded as PAL. The AR seems a bit off for a PAL video source however. If your player plays PAL VCD/SVCD, load the file up in TMPGenc and use the PAL temp[late. However, in the crop under advance options, under video arrange eethod, play around with it till you get something that looks right for the aspect ratio. choose center for video arrange ethod and play around with the resolution (does not affect actual video resolution, only the display aspect ratio) to get something you like. Keep the aspect ratio 4:3 since most players will not be able to properly display a VCD/SVCD with a 16:9 AR on a standard TV. keeping the AR as 4:3 and playing around with the video arrange method will make sure the file plays back oth properly on your PC and your TV. Hope this helps!

[sammie]

It's also a way of reducing the file size for sending stuff over the internet. Some brilliant person deduced that it really wasn't losing much information if you take into consideration 3:2 vs. progressive. Well, it does make the file a lot smaller, but for real movies it just doesn't work. I've seen some files that I think they IVTC'd then cut the frame rate down that weren't too bad, but I don't think they were half frame rate, I think they were something really goofy like 2/3s.

I think chrsiservices is probably right though. A lot of the capture software that comes with capture devices has half framerates as a choice. I even installed one that had it as the deault! So it might even just be an oops in capture.