PAL celltimes to NTSC

[kurbads]

I have cell times from PAL DVD bup file.
But the video is 23.976 pulldowned NTSC .
The PAL DVD therefore in minutes is some 5 minutes shorter.
If I apply PAL celltimes to NTSC video when authoring in IFO edit, will chapter locations match?
PAL has 208710 frames, the NTSC has 208517 frames.

[manono]

Hi-


If I apply PAL celltimes to NTSC video when authoring in IFO edit, will chapter locations match?

No.

I assume the number of frames in both videos is the same.

No again. For NTSC, what's important is not the number of encoded frames (23.976 x film length in seconds), but the number of displayed or outputted frames (after pulldown, 29.97 x film length in seconds).

How does pulldown interferes with number of frames.

It affects the Celltimes.txt quite a bit. To change the PAL Celltimes.txt to one for NTSC, multiply each PAL frame number by 1.25. 29.97/23.976 = 1.25

PAL has 208710 frames, the NTSC has 208517 frames.

Did you do this conversion? Because as you said, the number of encoded frames should remain the same. I don't know how the conversion was done or how you got the frame counts, though, so I can't explain the differing frame count without more information.