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broadcast safe QUESTION
Came across a strange situation. HD footage uprezed into a project on an Avid Adrenaline HD. Playing from the timeline, on my waveform monitor, everything looks fine. But when I go to do a digital cut and watch the footage (on the waveform monitor) hitting the tape, it’s illegal. So I stop the digi cut, wait for the avid to catch up (the play head staying on where the digi cut left off) and then click on the record monitor, while doing this I watch the monitor and literally see the waveform go from unsafe back to safe. WHAAAA!!!!!!! Does anyone have any idea why this is happening?
Thanks,
Drew -
2 Replies
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Have you (or an engineer) set up the system? Meaning, set output levels, input levels, checked the waveform monitor to make sure it’s calibrated? Are you monitoring your output signal (SDI or component) or a composite signal? Is everything terminated correctly? There’s a really good book from Tektronix about NTSC monitoring basics. I’d suggest you go there (you have to register) and get the book (it’s a PDF file).
We are going through the same thing. I haven’t cracked the code yet, but I’m getting close. We input and output SDI and compnent to a Meridan system, but monitor the composite output of the Meridian box. If I look at the composite out or our DVC Pro deck, it’s horrible – hot video, super blacks. If I look at the output tool of the scopes, or monitor the CV output of the deck or the Avid, everything is fine. To try and fix the problem, we are investing in a SDI/Component WFM/V-scope. That way we can monitor the specific signal coming from and going to tape.
Unfortunately, there is no ‘make not suck’ button to correct this. It truly takes someone with an engineering background and knowledge of which breed of chicken to sacrifice to get it right.
Not much in the way of specific answers, but I hope this helped!
Jon
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Jon,
Thanks a bunch man. I was under the impression I’m looking at the component or sdi video out from the avid. What’s weird is this never happened before. Anyway, thank you for the tektronix lead. I’m an assistant editor who kinda got thrown into doing onlines so I’ve kinda had to teach myself all this. Good luck on your end.Thanks again.
Drew
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