Wierd lines when capturing Video??

carrspaints wrote on 10/30/2004, 3:16 AM
Hi everyone....I've just received and installed my FireWire card today. I have connected up my Canon XM2 and Sony Vegas captures the Video from this okay. But I have 2 problems and I hope someone can help me:

1) 1st problem is that my captured video seems okay when the subject matter is still. But as soon as motion is involved, the picture quality drops off with what looks like clear lines - hard to explain but I have seen this before somewhere - I think it had something to do with "progressive" versus "interlaced" capture or something. I'm using PAL settings as the XM2 is a PAL version. I'm sure the fix is simple but I've looked at the settings available in Sony Vegas but nothing has helped improve this. If I'm not mistaken, my Sony Vegas is using the DVSR codec at this time.

2) For some reson, Sony Vegas is saving my captured video in loads of .AVI files, varying in size from 12 MB to 38MB. That being the case, I'll end up with hundreds of AVI files that I'd have to join together. Can I change this so that Vegas 5 saves the file as one, not 100?

Thanks in advance for your help.

Comments

mel58i wrote on 10/30/2004, 3:53 AM
I use the same setup as yourself with XM2 (but using V4).
Ican only put down the weird line as the fact that a pc monitor is progressive as opposed to interlaced. Try rendering back to tape and view on tv.
As to your multiple files on capture - seems as though you have "dv scene detection" on - a must if you want to edit, with each scene showing as a seperate event on the timeline. If you want one file only then in the capture settings go to "options"-"preferences"-"capture" and uncheck "dv scene detection".
Hope this helps.

Mel.
carrspaints wrote on 10/30/2004, 5:38 AM
Thanks Mel, tried unchecking DV scene detection and that seems to have done the trick. Thanks again.
TeeJay wrote on 10/30/2004, 8:02 AM
I have exactly the same problem with my captured footage, and I have yet to find a plausible answer from anyone. I too use a Canon XM2, although I have also the same problem when captured from my single chip Panasonic.

I recently attended a VASST seminar in Melbourne and quizzed Spot on it, without result, and then left it in the hands of the Techs at NewMagic. No-one has been able to give me a satisfactory explanation. Since, I have built a new system, bought a new capture card, put a different OS on the system, all yielding the same results.

Then, I discovered SuperSampling. This function is available if you right click the Video Master track. I create an envelope with a SuperSampling rate of 2 to 3 and it has solved the problem of getting rid of the lines, although I'd still love to know why it is happening.

Hope this helps you out a little.
John_Cline wrote on 10/30/2004, 9:00 AM
What you're seeing is almost certainly the effects of interlacing and it is perfectly normal to see these effects when viewing interlaced footage on a progressive display like a computer monitor.

Try playing the footage out of Vegas back through your XM2 to a television and things will most likely look just fine.

John
TeeJay wrote on 10/31/2004, 3:15 AM
Hmn......I wish it was as simple as an interlacing issue. These lines are most prevalent in fast motion and are extremely accentuated when the footage is panned in.

I spent an awful long time and not to mention, wasted a lot of discs, rendering out test footage using every setting under the sun, as well as viewed it on every TV and Monitor that i could get my hands on, all to no avail.

I have come to terms with it now and have found that the use of SuperSampling makes this a bearable problem.
John_Cline wrote on 10/31/2004, 7:36 AM
Could you post a frame grab somewhere of what you're talking about?

John