I have converted a fair bit of PAL interlaced footage to NTSC using avisynth with very good results.
BUT, I have in front of me a PAL DVD that I want to convert to NTSC and I am not sure what frame rate to use. I stepped though some of the video and I am 99% sure it is NOT interlaced, I see no interlaced frames anywhere. Now my question is, should I be converting this to 23.976 NTSC or 29.97? I know if I use 23.976 w/pulldown the conversion is very easy and there are no problems with smooth motion etc. But using 23.976 changes the speed of the video of course. (again not a problem I can easily adjust the audio to match)
What I am really asking is, what is the CORRECT frame rate to use for the conversion? Pure 29.97 or 23.976 w/pulldown? Every attempt I made to convert it to pure 29.97 video resulted in jerky motion. (maybe this is trying to tell me something)
The DVD is Pink Floyd - The Making of Dark Side of The Moon.
Another question is, how was this originally filmed? Using a 25fps video camera, or 24fps film that was sped up when put into a PAL DVD? I realize you can't answer that without actually seeing the video, but what is most likely? (to my eyes it looks like video for the interviews etc. but some of it looks like film footage, for example some of the old music videos)
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Film is transferred to PAL by speeding it up from 24 to 25 fps.
Therefore the right way is to convert all frames as they stand (no fps conversion), AssumeFPS(23.976), pulldown to 29.97, and slow the audio down by 23976/25000 (I use AC3Machine for this). -
Originally Posted by MrMoody
Let me put it this way, if this DVD was ever released in NTSC commercially (maybe it was?), what would the frame rate be.
edit: There does appear to be an region 1 version of this disc.
I also found a review of the DVD. I am not 100% sure if the review is of the region 1 disc though. It probably is. One of the things the review noted:
Also, I noticed that when one of the men would move while talking, the image would blur and sometimes ghost, then come back into sharpness when he held still. -
The ghosting is an indication that it has been de-interlaced. Treating it as film will give you the best possible result IMO.
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