Double Image Only When Capturing Problem :(

[evilfantom]

Posting this for a friend...

I'm having a problem capturing certain VHS tapes. I get a flickering double image which comes and goes when capturing older videos. It only shows up when I capture , not when I play the video tapes on my TV.
I'm using a Radion 64MB DDR Vivo card and have a 900MHZ Pentium III with Windows ME.
Are there any settings on my card that might help?
Thanks

[evilfantom]

Whoops!

Forgot to mention that these videos are bootleg concert videos of unreleased shows, not commercially released copyrighted tapes.

[SLK001]

Sounds like a problem with your frame order. Try experimenting with UPPER FRAME FIRST and LOWER FRAME FIRST. Also, this may be a system overload issue, where to maintain the data transfer to the HD, the displayed video is sacrificed (ie, dropped frames).

Are you saying that the PLAYBACK is also jerky?

[evilfantom]

Yes playback is jerky. My friend has been able to capture many videos with no problems. One of the flickering videos is tape 2 of a 2 video set. Tape 1 captured beautifully. Could it be that the videos have some sort of copy protection? My friend thinks that the video signal may be bad on the tapes. He used a signal booster and it improved the quality some what. Any ideas? We really want to get these awesome shows onto VCD! I have some small 5 meg samples I could send via AOL Instant messenger if anyone wants to check them out. My AOL name is evilfantom

Thanks!

[evilfantom]

I should clarify that the tapes playback perfectly on the VCR connected to the TV via RCA cables. The video tape playback while capturing on the PC is jerky and so are the captured MPEGs, they have the double image.

Thanks again!

[Anonymous65]

You can get this effect when the vertical sync is bad, meaning the tape has noise during the vertical interval. Then the capture card cannot distinguish between the fields and they get messed up. The only options are to try another VCR, adjusting the tracking control, or run the video through a TBC before capture.

[evilfantom]

What is a TBC?

[Davnewt]

Hi,
I'm the guy with the capture problem. Would copying the video to another tape and then capturing solve this problem? I will try it out and let you know.

[SLK001]

TBC - Time Base Corrector. This device STRIPS out the vertical sync pulse (and interval) and inserts a CLEAN VRI (Vertical Retrace Interval). Used to strip out macrovision protected video tapes. If your problem is truely a vertical sync issue, I would expect picture rolling (maybe?), but the capture card may exhibit this as jerking.

[SLK001]

Hi,
I'm the guy with the capture problem. Would copying the video to another tape and then capturing solve this problem? I will try it out and let you know.

No, it won't... copying will only make it worse (loss of MORE quality).

[Davnewt]

Where can I get an affordable TBC that will do the job?

[t0nito]

You can get this effect when the vertical sync is bad, meaning the tape has noise during the vertical interval. Then the capture card cannot distinguish between the fields and they get messed up. The only options are to try another VCR, adjusting the tracking control, or run the video through a TBC before capture.

This is exactly the problem I'm having in my captures from my NTSC vcr double image field A and field B aren't sincronized, it starts out ok but when the image rolls even once it starts repeating the same image twice with about 1 sec of diference and tracking doesn't remove the noise out completely. It doesn't happen in my PAL vcr.

[mstar69]

I have similar problem with capturing a VHS tape using ATI Rage Fury Pro and Virtualdub.

It plays back very well. But as soon as I start capturing it, screen remains just little stripe of upper part(1/20).

I searched for the reason and found there is macrovision protection.

My wife uses the tape everyday and video quality is already deteriorating rapidly. So I tried to make VCD.

If it's related with such copy protection, is there any software to solve the problem?

Thanks.

Kisoo