Frame rate chages during TV-capture

[au7usa]

I was playing around with my capture card the other day and just happened to count frames in test capture. The source was Cartoon network, and although the commercial had an interlaced cycle count of 5 (3:2), the count suddenly changed when program came back on.

It was still interlaced, but the source was at a different frame rate.

I was able to Change the frame rate so the feilds were in synch for the commercial, but when the toons came back on, everything was All Mucked-Up.

Is deinterlacing the only option, and how exactly can it deal with the change in interlace frequency?

[pijetro]

If you're capping at 29.97fps, and then encode for interlaced output, it won't matter..

As long as your field order didn't change. But that's been known to happen..

If it's the Inverse Telecining that you're trying to achieve, then I would suggest reading the Decomb.dll package that can be used as a plugin through AVISynth. There's a great Readme.txt that people should read..

[FulciLives]

I was playing around with my capture card the other day and just happened to count frames in test capture. The source was Cartoon network, and although the commercial had an interlaced cycle count of 5 (3:2), the count suddenly changed when program came back on.

It was still interlaced, but the source was at a different frame rate.

I was able to Change the frame rate so the feilds were in synch for the commercial, but when the toons came back on, everything was All Mucked-Up.

Is deinterlacing the only option, and how exactly can it deal with the change in interlace frequency?

NTSC cartoons or animation rarely if ever follow a standard 3:2 telecine pattern unless perhaps it was first a theatrical film like AKIRA or THE LION KING

As a result it can be next to impossible to IVTC such cartoon/animation sources.

If you will be creating a VCD or SVCD or DVD then you are best to leave it at 29.970fps interlaced. The only time you would want to consider deinterlacing is if you plan on making a DivX/Xvid MPEG-4 type file which will only ever be played on a progressive computer monitor.

- John "FulciLives" Coleman