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Haunted Audio Playback
Let me start by saying I’m working on a bio of Stephen King, so it just may be gremlins, but…
I’ll be playing along a sequence (or viewer clip) and hearing it fine, then all of a sudden I stop hearing it. Playhead keeps moving and picture continues. If I go to Refresh Devices everything is fine again.
But the weirdest thing was today. I was playing the sequence and similar to the above, all of a sudden it hit a clip and played a section of it like a broken record. I couldn’t get it to stop. I had to apple Q.
I reinstalled the AJA package, trashed prefs, repaired permissions (lots of ACL errors that won’t fix themselves.) It appears to be losing the connection with the AJA is my guess, but picture continues which is weird.
Andrea Stewart
Producer/Editor/Director – Owner
Germane Creative LLC -
11 Replies
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Quit FCP and delete all of your audio render files on your scratch disk.
Jeremy
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Hey Jeremy,
I don’t think that’s it, since its happening on two projects I have going, each with media and renders on separate drives. And one project doesn’t even have any audio renders.
-Andrea
Andrea Stewart
Producer/Editor/Director – Owner
Germane Creative LLC -
[Andrea Stewart] “And one project doesn’t even have any audio renders. “
Are you sure that the renders are going to the appropriate drives? Every time you switch a project do you switch your preferences?
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Slow thru-put on internal drive?
Corrupt file?
Trash prefs?
Delete render files?
Chris Tompkins
Video Atlanta -
Would it be possible that a bad audio render file from a separate project could affect another project?
(And yes, each project gets re-directed to the appropriate drive.)
Throughput shouldn’t be a problem since one drive is an eSATA 4TB RAIDED for Fast and Safe, and the other is my internal – 3 drives software RAIDED together.
Another oddity, but probably related is that I keep getting dropped frames on capture and ETT, which I’ve never had before.
Andrea Stewart
Producer/Editor/Director – Owner
Germane Creative LLC -
[Andrea Stewart] “Another oddity, but probably related is that I keep getting dropped frames on capture and ETT, which I’ve never had before. “
Sounds like your drives are slowing down. If this is the case, that is what happening n playback too, it’s dropping frames, you just don’t have the warning turned on your FCP prefs.
DO me a quick favor, though. In your system hard drive > user > documents folder, do you see a folder marked Final Cut Pro Documents? And if so, are there render and or audio render files in there?
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No render files on the system drive. Used Spotlight and see that I do have multiple Audio Render folders on the appropriate drives. (you know how you always end up creating extra instances of FCP Documents folders when setting the capture scratch drive.) I don’t think that should matter. I can move them all together, but I think that will confuse the system even more.
Is there a way to test the throughput of your drives? I don’t think I can de-Frag a RAID, but I have run verify and repair and everything has been reported as fine.
Andrea Stewart
Producer/Editor/Director – Owner
Germane Creative LLC -
[Andrea Stewart] “Is there a way to test the throughput of your drives?”
Yes AJA has a free program call AJA System Test that is downloadable from their website here:
https://www.aja.com/ajashare/AJA_System_Test_v601.zip
[Andrea Stewart] ” I don’t think I can de-Frag a RAID, but I have run verify and repair and everything has been reported as fine. “
How much space is left? Do you have both drives connected to your computer at the same time? And both projects open at the same time? Do you have report dropped frames turned on in your FCP prefs? If not, turn them on and playback, does it drop frames?
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For the internal RAID, out of 1.36 TB, I have 790GB left., and for the eSATA, I have 1.7 out of 1.8TB available.
Sometimes both connected, sometimes not. Generally I only have one project open at a time. And I did turn off the dropped frames pref b/c it was bothering me while editing with the client.
Ran the AJA system test (thanks for pointing me to it). Of course I have no idea how to interpret the results, but I found that Read rates on the internal drive dropped below 60MBsec and even down to 9 for a frame. I’m working in a ProRes NTSC timeline with media encoded the same. On average Read was 160MB and Write was 112MB. Similar results on the write. They also seem to start slow for the first few frames of the test.
I suspect those 9MB/sec moments are when I’m experiencing dropped frames and audio stops playing.
Andrea Stewart
Producer/Editor/Director – Owner
Germane Creative LLC -
[Andrea Stewart] “I suspect those 9MB/sec moments are when I’m experiencing dropped frames and audio stops playing. “
Yes. Perahps there’s a drive going bad in your setup.
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