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Audio dropout in timeline
I’ve posted before on this topic but I now have more information.
I’ve imported a clip from mini-dv. The audio rate is 48.0khz.
When I play it in my timeline, I get a dropout near the end of about 1 second. However, the audio meters and wave forms show that there’s sound there. And when I scrub through the timeline, I can hear the sound.
If I double click on it and bring it up into the viewer, I can hear the audio fine.
I can export out the audio as AIFF and play it in QT and it’s fine so the audio is there.
Could it be a timeline setting that I’m missing? I had this problem before but I thought it was because my audio was at 48.009 (or something not 48.0) and I was clipping.
I have trashed prefs in case that would make a diff.
Any suggestions?
Thanks,
PK
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4 Replies
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Create a new timeline and edit the clip to it.
If you still get the drop-out on a brand new timeline, I’d suspect an “iffy” capture or disk problem at that section of then capture (it happens).
A fix would be to recapture just that section of the tape (from a bit before thru a bit after the problem) and “match it” (frame-accurate) into your current project.
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Thanks. After some investigation, it seems like it has to do with a video glitch. Apparently, if you have even a slight video glitch, it causes the audio to drop (but oddly enough, not the video). I’m not sure why that’s happening but at least I’ve got it narrowed down.
The original source tape does not have the glitch but my digitized footage does. I’m wondering if it’s a dirty head on my deck. I’m gonna clean the deck heads and recapture.
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[PK] “I’m wondering if it’s a dirty head on my deck. I’m gonna clean the deck heads and recapture.”
Sometimes a bit of “smooch” will just flick by the heads during a playback.
Next time you play the same spot, everything will be OK.Also, if the tape has a “weak” dropout, some playback passes will actually look better than others
(due to the nature of the way Drop-out comps and/or error-correction circuits work.)With Avid, I used to digitize certain sections of BetaCamSP tapes several times and only keep the best-looking playback.
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I’ve had this happen several times in the last couple of months. I’ve borrowed this deck from a friend and he bought it used so I have no idea how well it’s been taken care of. I assume cleaning will not hurt it.
I have recaptured some other footage and it does fix the problem. So I know it isn’t the original tape because the problem doesn’t occur in the same spot. Plus, I don’t see the problem on the original tape. It’s funny but you almost can’t see the video glitch. You have to go frame by frame and look very closely at the entire frame.
Thankfully, I did some searching on this site and finally found someone with the same problem which is where I got the answer that it could be a video glitch. I would’ve never have guessed since I was hearing audio problems and not seeing video problems.
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