Compressed video gets jagged horizontal lines at DVinfo.net

Aleksandr Kravets · December 31st, 2007, 03:41 PM

Hello,

I bought Canon HV10 and must say that it's the best camcorder I've owned yet!
One problem though, when I try to render my video to MPEG-2 in Sony Vegas, after conversion I get these jagged horizontal lines whenever something fast happens in the video (car is driving by, person is running). Why is that? What am I doing wrong?

thanks,
Alex

Aleksandr Kravets · December 31st, 2007, 03:50 PM

And the horizontal lines look exactly like this: http://docs.info.apple.com/article.html?artnum=25318

I am not sure about the "Movie Mode" because connecting camera straight to TV does not have these lines.

Alex

Austin Meyers · December 31st, 2007, 06:09 PM

that's just interlacing, you're not doing anything wrong, and when you view it on a tv, like that apple doc says, you won't see it. i'm assuming you're exporting to mpeg2 to make dvds? if so you don't have to worry about it, as it won't show up on the tv, and if you play it back on the computer most players have an option to deinterlace.

you're other option is to deinterlace before you export it, that way regardless of what you export to it will have clean images.

you'll have to get one of the guys here with more vegas experience to help you out with the deinterlacing process

Michael Jouravlev · December 31st, 2007, 08:05 PM

You need to deinterlace before scaling. Vegas can do it for you.

Leopold Hamulczyk · January 1st, 2008, 03:26 AM

Are you rendering out to the same resolution or scaling? If scaling, in the project properties you need to set deinterlace to either Blend or Interpolate. And make sure Vegas is reading your source video correctly (it probably is) - ie it's top field first for HDV. Having said that, I'm not particularly happy with Vegas's downscaling as moving diagonal lines have jagged edges (more than you'd normally expect from interlaced NTSC). So I'm considering purchasing Procoder as it does a brilliant job of scaling interlaced video.

Aleksandr Kravets · January 2nd, 2008, 09:34 AM

Thanks for the help guys!

I believe I was deinterlacing my footage correctly, but may be it's the properties I am setting when it's time to rendered, at least according to this: http://www.dvinfo.net/conf/archive/i...p/t-14408.html

I'll try to play with this some more.

Seun Osewa · January 5th, 2008, 06:32 PM

If your footage has those lines, then you are definitely not deinterlacing correctly.

December 31st, 2007, 03:41 PM	#1
Aleksandr Kravets Tourist Join Date: Dec 2007 Location: New York Posts: 3	Compressed video gets jagged horizontal lines Hello, I bought Canon HV10 and must say that it's the best camcorder I've owned yet! One problem though, when I try to render my video to MPEG-2 in Sony Vegas, after conversion I get these jagged horizontal lines whenever something fast happens in the video (car is driving by, person is running). Why is that? What am I doing wrong? thanks, Alex

December 31st, 2007, 06:09 PM	#3
Austin Meyers Contributor Join Date: Aug 2005 Location: austin, tx Posts: 300	that's just interlacing, you're not doing anything wrong, and when you view it on a tv, like that apple doc says, you won't see it. i'm assuming you're exporting to mpeg2 to make dvds? if so you don't have to worry about it, as it won't show up on the tv, and if you play it back on the computer most players have an option to deinterlace. you're other option is to deinterlace before you export it, that way regardless of what you export to it will have clean images. you'll have to get one of the guys here with more vegas experience to help you out with the deinterlacing process __________________ Compositing is my life right now. IMDB page: http://www.imdb.com/name/nm3596782/

December 31st, 2007, 08:05 PM	#4
Michael Jouravlev Major Player Join Date: Jul 2007 Location: San Diego Posts: 209	You need to deinterlace before scaling. Vegas can do it for you. Last edited by Michael Jouravlev; January 1st, 2008 at 02:33 PM.

December 31st, 2007, 03:50 PM	#2
Aleksandr Kravets Tourist Join Date: Dec 2007 Location: New York Posts: 3	And the horizontal lines look exactly like this: http://docs.info.apple.com/article.html?artnum=25318 I am not sure about the "Movie Mode" because connecting camera straight to TV does not have these lines. Alex

January 1st, 2008, 03:26 AM	#5
Leopold Hamulczyk New Boot Join Date: Dec 2007 Location: Bairnsdale, Vic (Australia) Posts: 21	Are you rendering out to the same resolution or scaling? If scaling, in the project properties you need to set deinterlace to either Blend or Interpolate. And make sure Vegas is reading your source video correctly (it probably is) - ie it's top field first for HDV. Having said that, I'm not particularly happy with Vegas's downscaling as moving diagonal lines have jagged edges (more than you'd normally expect from interlaced NTSC). So I'm considering purchasing Procoder as it does a brilliant job of scaling interlaced video.

January 2nd, 2008, 09:34 AM	#6
Aleksandr Kravets Tourist Join Date: Dec 2007 Location: New York Posts: 3	Thanks for the help guys! I believe I was deinterlacing my footage correctly, but may be it's the properties I am setting when it's time to rendered, at least according to this: http://www.dvinfo.net/conf/archive/i...p/t-14408.html I'll try to play with this some more.

January 5th, 2008, 06:32 PM	#7
Seun Osewa Major Player Join Date: Oct 2006 Location: West Africa Posts: 255	If your footage has those lines, then you are definitely not deinterlacing correctly.