Problem with Canon ZR-10

edbeach wrote on 1/3/2004, 1:51 PM
I am having a problem that I am blaming on my Canon ZR-10. I occasionally get groups of 8x8 pixels that are recorded in whatever color the camera feels like recording. Several groups of the pixels may be next to each other and sometimes the arrangement is identical to previous errors. I usually notice this problem about once per hour when watching the original on the TV, but after it is captured and played in Vegas I notice it every 5 or 10 minutes. The sound generally drops out at the same time, especially in Vegas. It seems that more often the problem is in playback and sometimes it is in recording. The problem can be seen at www.leabeach.com/vegas/vegas2.htm . A less common but easier to explain problem is the banding that occurs for about 3 consecutive frames as in www.leabeach.com/vegas/vegas1.htm . I have sent my camera in for repair (under a Circuit City maintenance contract) several times without it’s being fixed. All they have done is clean the camera. I’m afraid that if I can’t give Circuit City a better idea of the problem they won’t fix it. I would just get a newer and better camera, but I can’t justify the expense (to my family) when I only use it once or twice a year for something significant. Any ideas what is wrong and should I be able to get acceptable recording quality (not get the problems in the samples above) at both standard play and long play?

I have a second problem that I would post separately, except that I am using the same Canon ZR-10. I am trying to transfer my old video recordings to digital video. I have tried recording and playing on three VHS recorders and one 8 mm camera with similar results. About the bottom 2% of the picture is out of sync when it is rerecorded on the Canon ZR-10 as can be seen at www.leabeach.com/vegas/vegas3.htm . When I record directly from the TV cable box there doesn’t seem to be a problem. Again, any ideas?

Thanks.

Ed

Comments

farss wrote on 1/3/2004, 2:23 PM
Problem with camera is almost certainly head clog. Get cleaning tape and use as per instructions i.e. run it for no more than 10 seconds.

Second problem is just part and parcel of VHS, the "tearing" occurs due to head switching. Normally this is outside the visible area of the frame when viewed on a TV. With Vegas you can see the whole frame. If you are going to encode to DVD mask it out or use the Border FX to clean up the edges of the video.

Not much else you can do about it, it got there when the tape was recorded. A better quality machine will make this less noticable but only when you record new programs.

BTW when trying to retrieve old VHS a TBC helps no end.
kentwolf wrote on 1/3/2004, 8:06 PM
>>...TBC helps no end...

Question: What is "TBC?"

Thanks.
farss wrote on 1/4/2004, 12:47 AM
Time Base Corrector.
The sync pulses coming of VHS can be very jittery which isn't much of a problem for a TV but is for anything trying to do an A/D conversion. In some cases it'll show up even on a TV as the top part of the frame waving or wobbling. Also a lot of the chroma banding gets cleaned up as well or myabe that's to do with the Digital Noise Reduction,
I'm in PAL land and therefore don't have to cope with quite as many problems as you do with NTSC analogue video but even so it's pretty staggering just how much a bit of signal processing can clean up the picture.

These problems aren't limited to VHS either, even BetaSP can need a TBC and a Dropout Compensator to get clean video.