Line artifacts? at DVinfo.net

Raneath Sokha · November 16th, 2007, 08:04 AM

I have a downconverted SD video clip from my Canon A1. I play the original footage on WMP. It looks perfect (lines are smooth). But, when I import it into Premiere or AE to add effects and stuff like that, then I export it out. The exported clip has this weird artifacts of lines that look choppy (the original untouched footage has lines that are smooth). Why is it like that? Is it because of the codec?

Raneath

Amie Spiridigliozzi · November 28th, 2007, 11:32 AM

I have the same problem. Any lines in my video move, how do I get them smooth? Is it the camera or editing? I think it's in my camera too.

Don Palomaki · November 28th, 2007, 03:31 PM

How are you down-converting?

Raneath Sokha · January 9th, 2008, 07:17 PM

hey guys I downconverted inside the camera. As for the jagged lines, I think I've found the remedy or so I think.

1) If you use premiere, do not use the slow motion inside premiere because it will make the lines in the image all jagged. That's premiere pro 2.

2) If you import the clip into after effects and do stuff with it, you have to import it back into premiere. Put the clip on timeline, render it, and export. Then, you'll see it plays back smoothly. Stuff coming out of AE needs to be rendered one more time. I don't know if it is right but I did it this way and it works for me.

November 16th, 2007, 08:04 AM	#1
Raneath Sokha New Boot Join Date: Aug 2007 Location: Chicago Illinois Posts: 11	Line artifacts? I have a downconverted SD video clip from my Canon A1. I play the original footage on WMP. It looks perfect (lines are smooth). But, when I import it into Premiere or AE to add effects and stuff like that, then I export it out. The exported clip has this weird artifacts of lines that look choppy (the original untouched footage has lines that are smooth). Why is it like that? Is it because of the codec? Raneath

November 28th, 2007, 11:32 AM	#2
Amie Spiridigliozzi New Boot Join Date: Apr 2007 Location: Danvers, MA Posts: 19	Lines I have the same problem. Any lines in my video move, how do I get them smooth? Is it the camera or editing? I think it's in my camera too.

November 28th, 2007, 03:31 PM	#3
Don Palomaki Wrangler Join Date: Sep 2001 Location: Northern VA Posts: 4,488	How are you down-converting? __________________ dpalomaki@dspalomaki.com

January 9th, 2008, 07:17 PM	#4
Raneath Sokha New Boot Join Date: Aug 2007 Location: Chicago Illinois Posts: 11	hey guys I downconverted inside the camera. As for the jagged lines, I think I've found the remedy or so I think. 1) If you use premiere, do not use the slow motion inside premiere because it will make the lines in the image all jagged. That's premiere pro 2. 2) If you import the clip into after effects and do stuff with it, you have to import it back into premiere. Put the clip on timeline, render it, and export. Then, you'll see it plays back smoothly. Stuff coming out of AE needs to be rendered one more time. I don't know if it is right but I did it this way and it works for me.