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MPEG2 Inverse Telecine w/o Recompression
MPEG2 Inverse Telecine w/o Recompression
BoxMonster
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I have a DVD that should have been progressive 23.976 but is interlaced 29.97 instead.
I want to know if I can perform an inverse telecine on it without converting it to MOV and compressing it back to DVD (which would look horrible). In other words, can an inverse telecine be done on an MPEG2 file with the result being an uncompressed MPEG2?
Also, I am very inexperienced with computers, so please give me your explanations in layman's terms.
Thanx!
Moth3r
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Better Grumpy than DopeyIf the MPEG2 stream is 23.976 encoded frames per second but with field repeat flags making the framerate up to 29.97, then yes you should be able to get the progressive frames output.
If, on the other hand, it is 29.97fps hard-telecined material, you will have to IVTC and re-compress.
The DGMPGDec manual explains this pretty well, but since you mention MOV I assume you're on a Mac?
BoxMonster
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Yup I'm on a Mac, but since I have Bootcamp I kind of have a PC, too.
Is there an IVTC method for MPEG2 that will still look good as a result?
Moth3r
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Better Grumpy than DopeyMethod:
29.97fps MPEG-2 source
-> decode
-> IVTC filter
-> re-encode
23.976 MPEG-2 output
Re-encoding a lossy source is never ideal, but keep in mind that encoding 23.976 progressive fps is more efficient than 29.97 hard-telecined fps (effectively, there'll be 20% fewer frames to encode). With a good MPEG-2 encoder, losses should be minimal.
MPEG2 Inverse Telecine w/o Recompression