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Audio distorting the picture on HVX-200
Just something I’ve noticed that might be of interest.
First let me say that if your sound guy knows what he’s doing this should never happen to you, but lucky me…
I did some talking-heads and my camera op/sound guy had the gain turned way too high on the mic receiver (the level peaks around -15 db on the camera (mic input)). One of the interviewees has a particularly booming voice and when he really talks loudly, the audio seems to be the cause of image dropout (that green/pink checkerboard you may have seen).
I point this out because, should you happen to be recording with loud sound on the set and send a distorted audio signal to the camera, then this may cause you picture problems too.
Or maybe this is just a huge coincidence.
For what it’s worth.
Ken
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5 Replies
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Ken,
you fail to mention were you shooting with the HVX 200 in the HDV or SDV mode?
I am an audio guy / video tech that knows what he is doing, and I set peaks for -12db on HVX 200 in the SD mode, -20 in the HDV, no distortion what so ever. Manual does state that there will be noticeable level differences in the two modes.
I have never heard of the green and pink noise you mention. Curious as to what others have to say on that particular problem… -
Ken, how are you importing?
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Edward:
The HVX-200 records in DVCPRO HD, not HDV, and this is the mode it was in (720P/30PN). Also, it was not the camera that was clipping the audio, it was the wireless mic system (not sure if it was the transmitter or receiver, but probably the transmitter). As to the video noise, I’ve only seen it a few times in the year and a half that I’ve been using the camera and I have always just referred to it as a dropout. Click on the link to see what I’m talking about.https://abvc.ca/P2_video_noise/P2_video_dropout.jpg
JeremyG:
I was recording onto a 4 Gig P2 card, which was downloaded on a G4 laptop directly into Quicktime via FCP 5.1.4 I do not have the MXF original to check.Thanks to both of you for your interest.
Ken
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[Ken Nemetchek] “I was recording onto a 4 Gig P2 card, which was downloaded on a G4 laptop directly into Quicktime via FCP 5.1.4 I do not have the MXF original to check.”
This is most likely your problem. There was glitches when importing media straight from the card with G4s. The best thing to do is copy the P2 contents to another drive before importing to FCP.
Jeremy
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The problem may not be the audio level, it may be the subject matter – try removing Frau Blucher from the set – or, if that doesn’t work consult your old friend Mr. Ustrandskun.
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rex
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