[Elphel-support] Corruption in QuickTime Files - strange FPS

Nathan Clark nathan at nathanclark.com.au
Tue Jun 7 01:04:22 PDT 2011


Hi there everyone,

I've been troubleshooting this issue for a few days and have come to no fix.
I think there is a serious problem.

We recently bought 2 elphel 353's and are experiencing some concerning
issues with one of them.
When recording to HDD, we are getting constant corruption in the quicktime
files.

The camera will record fine for a little while,
Splitting quicktimes correctly (every 1.1GB for example)
Then suddenly there will be a quicktime split, resulting in a much smaller
file (say 300kb - 200mb for example)
The camera will continue recording to HDD correctly (splitting at 1.1BG)
and again at some stage the same thing will occur- a tiny split quicktime
file...

This was confusing the hell out of me!

So, I opened one of the tiny split quicktimes in VLC and discovered there is
some sort of corruption in there somewhere!
The framerate reports a large arbitrary number (say 1034.445fps)
If I close and reopen the file, it will report a different framerate (say
335.756fps)
in any case, the file is very broken  :cry:

I imagine that the reason camogm is splitting the files is that it "thinks"
the files have reached the max seconds- due to the corruption in the fps
within the quicktime? I'm not sure.

This issue is only happening with one of the cameras- I have tested the HDD
and it is not the problem...
Im a bit concerned it might be a hardware problem within the camera??
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