Help deleting duplicate frames in a pattern

[dexter30]

Hi. I have this movie that a friend recorded from TV (.IFO/VOB format) The playback is jerky, there are
duplicate frames in the following exact pattern:

123455 123455 123455

FRAMES TIME
VTS_01_1.VOB 38928 (21:38)
VTS_01_2.VOB 38941 (21:39)
VTS_01_3.VOB 39331 (21:52)
VTS_01_4.VOB 38528 (21:25)
VTS_01_5.VOB 8215 (4:34)

TOTAL FRAMES: 5468
TOTAL TIME..: 01:31:08
RUNNING FPS.: 29.970

How can I delete the duplicate frames, while keeping audio in sync and FPS DVD compliant?

Thanks in advance.

[poisondeathray]

What is odd is that gspot says its 30p - that's is atypical for a TV recording (perhaps it was deinterlaced somewhere and not Inverse Telecined like it should have been? )

You can probably do it with avisynth, TDecimate() . This will return 23.976 fps progressive (original film rate) . This is DVD compliant if pulldown flags are added. You cannot remove duplicates without re-encoding

If you post a small sample with motion, like a panning sequence (e.g. cut with mpg2cut2), someone will confirm and suggest what needs to be done

[jagabo]

That's PAL 25 fps to 29.97 fps NTSC with frame duplicates. Use TDecimate(mode=2, rate=25) in AviSynth. You could use SelectEvery(6,0,1,2,3,4) but you'll find that the pattern changes every 30 seconds or so because of the difference between 29.97 fps and 30 fps.

[poisondeathray]

That's PAL 25 fps to 29.97 fps NTSC with frame duplicates.

Ahh you 're right ... he said: A,B,C,D,E,E ; not A,B,C,D,D . My bad

How can I delete the duplicate frames, while keeping audio in sync and FPS DVD compliant?

But 720x480 25 FPS won't be compliant on NTSC DVD players

[jagabo]

How can I delete the duplicate frames, while keeping audio in sync and FPS DVD compliant?

But 720x480 25 FPS won't be compliant on NTSC DVD players

Yes it is. Encode 25 fps progressive, then use DgPulldown to apply 3:2:3:2:2 pulldown flags. The resulting video will have judder similar to regular 3:2 pulldown, but not the 5 jerks per second of frame duplicates.

[poisondeathray]

How can I delete the duplicate frames, while keeping audio in sync and FPS DVD compliant?

But 720x480 25 FPS won't be compliant on NTSC DVD players

Yes it is. Encode 25 fps progressive, then use DgPulldown to apply 3:2:3:2:2 pulldown flags.

Right, that will work

I should have remembered, I 've done that on PAL content before . And I think we were discussing something similiar just a few days ago LOL

[dexter30]

How can I delete the duplicate frames, while keeping audio in sync and FPS DVD compliant?

But 720x480 25 FPS won't be compliant on NTSC DVD players

Yes it is. Encode 25 fps progressive, then use DgPulldown to apply 3:2:3:2:2 pulldown flags. The resulting video will have judder similar to regular 3:2 pulldown, but not the 5 jerks per second of frame duplicates.

Sorry, can you explain how can I do that?

[jagabo]

Encode as 720x480 25 fps progressive with whatever MPEG 2 encoder you want. Then open the resulting M2V file in DgPulldown and use the 25 -> 29.97 fps function to create a new M2V file. Use the new M2V and the original audio to make an NTSC DVD.