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Odd Ghosting on Image – Related to Interlacing?
Getting a strange problem with some of the stuff we’ve been pulling recently. We’re getting a ghosted image on certain frames with movement – I think it’s probably related to the interlacing somehow (the scanlines being read incorrectly?).
The ghosting does not appear in Final Cut Pro (the interlacing is visible on computer monitor, you can see the lines and such) – but after being encoded to M2V – and output to DVD, this is the image you get if you pause the frame on TV in certain spots. It’s not really visible when in motion, only paused on moving frames.
https://img279.imageshack.us/img279/5180/ghosting13pw.jpg
https://img290.imageshack.us/img290/9033/ghosting29dh.jpgThe material is being pulled from a Digibeta (and some from a Digibeta SP). Both seem to come up with this problem. We’re pulling it SDI through a KonaLH capture card at 10-bit, uncompressed. I’m outputting it as an M2V through Compressor with these settings: NTSC, 4:3, 29.97, Bottom First, Two Pass VBR Best, AvgBR: 5.5 – MaxBR: 6.5, GOP Structure: IBBP – Closed, GOP Size: 15, Motion Estimate: Best.
I can upload any screenshots of other settings if required.
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2 Replies
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BTW: We had the disc professionally QC’d – and they described the problem as being the result of disparate interlaced frames.
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It sounds like your Compresser setting is incorrect. Compressor sometimes does this for no reason. It will switch the preset from Lower field first to upper. If you were to import the same clip into Compresser three seperate times it would likely give you three different “auto” interpretations. You should manually set it to lower then do the encode.
By the way, there is no such format as Digibeta SP.Michael Alberts
Ambidextrous Productions, Inc.
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