Dear friends,
While digitizing a series of Betacam SP PAL tapes through an Intensity Shuttle for Thunderbolt, I have noticed that a couple of tapes showed a weird field shifting problem. I'm using an Ampex CVR-65 player connected using Y, Pb and Pr connections and the files are being saved as YUV 10bit uncompressed. Please see the problem on this frame:
- Field shift
- shot.jpg (55.35 KiB) Viewed 839 times
As you can see, one interlaced field is being shifted vertically and in time - it is clearly showed by the diferent position of the two fields on each plane.
I thought that tape was recorded as NTSC, but changing the Shuttle configuration doesn't work (no input signal), so the incoming video is truly a PAL signal. And this problem is present in about 10% of the tapes I digitized so far.
Does anybody know how can I solve this field shifting problem?
Any help would be greatly appreciated!