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Old February 4th, 2010, 06:59 AM   #1
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Standard def audio sample rate issue

I'm having an issue with recording standard def from the HD-SDI port of the JVC GY-HM700.
The audio appears corrupted in the Sony clip viewer and when I try to import the clips into Avid I get a sample rate error. I'm using MXF format, 50Mbs standard def on the Nano.

The audio corruption certainly sounds like an "unlocked" sample rate issue.

I'm trying to think how else I can test the camera to rule it out - I'll try to record live to my Avid I guess, setting the Avid to internal sync lock as the JVC has no sync input.
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Old February 4th, 2010, 07:47 PM   #2
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Further info and tests

OK - I can rule out he JVC for the audio late thing as well as the phasing issue. I checked on Avid and the audio straight out of the HD-SDI port compared to the recorded material on the camera is pretty close to identical in timing.

However the audio embedded in the HD-SDI during a standard def downconvert appears to be a JVC issue. When I tried to record this audio directly to Avid it was quite distorted. I think it is over to JVC on that one - Iguess I can go analogue out of the camera straight into the Nano as a workaround.
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