Picture "rolls" when trying to grab 60hz footage

[scully1888]

Hi guys, I recently bought a Canopus ADVC110, and while it's great for my PAL stuff, whenever I try to anything other than that I get a picture roll. This is the same whether I try it with S-Video or Composite connections. Also, the audio tends to crackle when this happens.

I have tried to capture footage from an American Sega Dreamcast game. I've captured footage to show what the problem is. The first part of the video is the capture with the ADVC110 set to Pal, and half-way through I flick the switch underneath the grabber to NTSC. As you can see, I get sound (albeit crackly sound) and the picture roll gets worse:

http://video.google.co.uk/videoplay?docid=2993165879711884421&hl=en-GB

I then tried with a UK GameCube game set to 60hz mode and the same problem occurs.

Is there an easy way to fix this, guys? I've tried every possible combination with the switches underneath, and this happens a lot when I try to capture any NTSC stuff, or try to capture PAL games in 60hz mode. I don't want to have to buy yet another grabber, because this one was pretty expensive for me and I bought it under the impression it could capture PAL, NTSC and SECAM footage flawlessly.

[GideonK]

Just came across your post
Check your TV specs to see if it is 50/60 Hz ready. If PAL TVs are not 50/60 Hz compatible, vertical size will be incorrect, and/or picture will roll vertically.

[jman98]

VERY VERY VERY FEW capture cards support that bogus 60 Hz signal. We get posts here all the time about it. I'm too lazy to do your work for you as I really don't care all that much (no offense, but I live in the USA and capturing a 60 Hz signal is about as useless to me as a 3rd nipple would be), but sometime last month I did a quick internet search and I found one or two video cards that claim to be able to capture this signal. If you dig through the Capturing forum posts into last month, you can hopefully find it without too many problems.

I'm sure your card does indeed capture NTSC, PAL and SECAM flawlessly. The problem is that this 60 Hz signal is a bizarre psuedo NTSC signal that is not really a true NTSC signal and that's why few capture cards support it.

[DB83]

Just to confirm what was said, the Canopus 110 will capture a pure signal NTSC and PAL.

Your source is more than likely to be outputing PAL60 which is NTSC with a PAL sub-carrier. The canopus can not handle this. I know as I have the next model up the ADVC300 and I have tried to do exactly what you describe.

If you really want to capture PAL60, you either need a digital converter to convert the PAL60 to PAL - not one that converts NTSC to PAL or a BT878 based capture card such as a Hauppauge Win-TV Express - be careful tho as some later cards have other chipsets and will not support PAL60.

Do a search here for PAL60. Lots of info about this.

[2Bdecided]

You can't switch the video mode on the ADVC devices with the power on - you need to power off!

PAL60 captured in NTSC mode will be black-and-white, but will not roll.

True NTSC captures fine (obviously!).

Also, your capture software needs to understand the PAL/NTSC change, and not get stuck in the wrong mode.

Cheers,
David.