Mike Debbie
Forum Replies Created
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Is there a possibility that the Avid is outputting something onto the tape thats causing the frame to shift around when i play it back on my deck?
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Ok here we go. The first pic shows a section of video i played down. At the bottom of the frame is the thick black line. I rewound to the beginning and played it down again. The black line appeared again,as shown in pic two, but was thinner than in pic one. And it’s definitely only happening with footage that was output from our Avid. Also, if this is an issue i’m looking into too much let me know. It’ll help me from going crazy.
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You know what, i was just realizing that the tapes i’ve been having issues with have all been output from an old Avid. Funny thing is though that the black bars may appear over one part of the tape, then might not appear if i rewind and play back over the same part. If that makes sense.
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I saw the black bar while testing through the AJA, as well as only coming out of the Beta to the monitor. And ran these tests with the same tape. Then i tried using a few different tapes in both test modes, and i didn’t get any black bars at all with the other tapes. So it seems maybe i’ve been working with some funky tapes. Thats why i was wondering how a tape could be giving me bad sync.
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No, no reference hooked up to the Beta when i played it back to the monitor. With just the Beta hooked to the monitor, i checked a few different tapes and didn’t get any black bars popping in during random test playbacks. How does a bad tape cause this issue?
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Right, i disconnected everything, component cables, audio, reference, RS-422, that was cabling the deck to the AJA and connected the component outputs from the deck into the monitor.
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Yup, the line still comes and goes after playing, pausing and replaying.
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I can see a little bit of the line in the monitor when hooked up to the to the AJA. Obviously its much more apparent in the monitors underscan mode. For broadcast i could probably get away with it, but my content is being sent to web as well so almost all the frame is visible. Before all i was getting was the thick black line, but now it comes and goes, so at least we’re on to something.
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Just re cabled the black burst. The thick black line at the bottom of the frame in the log and capture window appeared for less than a second then the frame sort of snaped downward into place removing the black line. The black line did reappear after a few play downs, but after pausing then replaying the deck, the frame would snap back into place removing the line. Is this a case of just eyeballing the frame to make sure it’s aligned/synced properly, or is this abnormal?
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One last note. The Deck, AJA, and Black Burst setup is on a wheeled cart which we use as our output deck for our three other Macs. Is it possible that constantly hooking the AJA to the other Macs can cause this ref issue?