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Error Identification #224

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iamdamosuzuki opened this issue Jun 5, 2020 · 2 comments
Open

Error Identification #224

iamdamosuzuki opened this issue Jun 5, 2020 · 2 comments

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@iamdamosuzuki
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My wife came across this error while doing research and asked if I knew what it was. To be honest I'm a bit confounded! There's lines across the frame that switch position, which could either by a dirty head drum or a creased tape, but I feel like poor transport alignment is the culprit here. Any ideas?

https://archive.org/details/2286ArchieGreen

If we're unable to identify this error completely I think it still may be worthwhile to include in the AVAA with some thoughts. I think it's extremely cool to see the entire sync tip coming into the frame!

@ablwr
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ablwr commented Jun 7, 2020

Wow this thing's a mess, great find! And also: have no idea, wish I did.

@michaelangeletti
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Oohh.... I think there's a lot going on there. At first, I thought there might have been a problem with a production switcher because the image breaks up every time the shot changes. That can happen with a matrix switcher that has an unstable reference input. But I don't think it happens consistently. It looks like the head switch is floating, too. I have seen that in mistimed analog video signals, but it could also be the result of a transport alignment problem. It could be compounded problems. I think that big horizontal shift is an example of mis-triggering, where you can see leading/trailing edge of active video and the horizontal blanking interval. I have some TBCs that produce this type of artifact with certain kinds of tape damage, but I don't think that's the case with this clip. Perhaps there 's an old-timer who could weigh in?

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