Odd bottom line..

Ogretoe · Post by **Ogretoe** » Tue Mar 18, 2003 2:44 pm

I have this distortion line that appears at the bottom of all my captured clips.. I have seen the same line in other people's videos, so maby it is just common for capture devices or something..

Would anyone happen to know about this?

klinky · Post by **klinky** » Tue Mar 18, 2003 5:01 pm

Yes, that's common vide "jitter" :\ or "jitter-lines". They appear on TVs too, just in the overscan section(covered by the bottom bevel on your TV). You need to overley a black strip on top of it or crop the video.

~klinky

klinky · Post by **klinky** » Tue Mar 18, 2003 5:02 pm

And WTF is your avatar ? One-eyed penis ?

Zarxrax · Post by **Zarxrax** » Tue Mar 18, 2003 5:03 pm

Hmm I believe its a foot O_o

TokyoU15 · Post by **TokyoU15** » Tue Mar 18, 2003 8:33 pm

with a pimple...

SS5_Majin_Bebi · Post by **SS5_Majin_Bebi** » Tue Mar 18, 2003 9:31 pm

Yeah, that funky line is like, "overscan" or something, and its just below the plastic covering on your TV. So, its nothing wrong with your capture card, I get the same thing. some cropping is in order!!

ErMaC · Post by **ErMaC** » Wed Mar 19, 2003 1:55 am

Actually it's the area of the picture where on a VHS tape the Hi-Fi audio track is stored. You'll notice you don't see those lines on DVDs or LDs, but you do see it on VHS tapes. I don't remember offhand if SVHS has this problem but I believe it doesn't.

SS5_Majin_Bebi · Post by **SS5_Majin_Bebi** » Wed Mar 19, 2003 2:13 am

Ah! So thats where the hi-fi track is. okay then.

tomj · Post by **tomj** » Fri Apr 04, 2003 9:51 pm

ErMaC wrote:Actually it's the area of the picture where on a VHS tape the Hi-Fi audio track is stored. You'll notice you don't see those lines on DVDs or LDs, but you do see it on VHS tapes. I don't remember offhand if SVHS has this problem but I believe it doesn't.

You don't see them on LDs because LDs do not use a pair of heads sweeping around a drum to read the disc, while VHS *does* - and the head that's come to the end of its sweep has to hand off to the other. But the tape is wrapped around slightly more than 180 degrees of the drum, so there's a little overlap. (I have a book somewhere; I may be misremembering.) DVDs, meanwhile, have nothing whatsoever to do with this analogue process. I *have* seen this changeover on notionally professional recordings - the Culture Q Connection on the Kizuna DVD - so I'm guessing Beta SP has the same mechanism, because I can't imagine why any D format, or Digibeta, would have the same issue.

As for the HiFi track - I thought that went directly under the picture information across the entire width of the tape, recorded by a separate pair of heads about 30 degrees or so ahead of the video heads?