Banding Issue on footage at DVinfo.net

Andy Harding · March 16th, 2007, 10:01 AM

Hi any one seen this before? Any ideas Lens, camera issue?

http://www.newtek.com/forums/showthr...791#post512791

John Miller · March 16th, 2007, 10:17 AM

I don't see any bands or lines.

Do you see this when viewing on a TV rather than a computer display?

Andy Harding · March 16th, 2007, 10:28 AM

Hi John they run top to bottom light then dark then light not all the way to the edges of the screen, still to test on the TV will be doing that next.

My VT4.6 is pretty good though usually if it's on screen it will be on the TV set.

John Miller · March 21st, 2007, 04:33 PM

Did you confirm the bands show up on the TV?

Andy Harding · March 22nd, 2007, 01:18 AM

Hi John, yes they do but are much fainter still to try the other lens thought so that will be the next stop if you don't know what your looking at and the main subject is in the center of the TV screen there will not much to worried about just want to know what is causing it camera or lens then take i from there.

Michael Nistler · March 23rd, 2007, 11:09 AM

Hi Andy,

The black bands don't seem to appear on your JPEG picture, aside from the normal astigmatism from the human eye blurring the adjacent real black border around the video. However, if you're objecting to the very thin black line that surrounds the entire video, I'd guess the image is cropped a bit much. So if you're encoding by say 320x240, I'd try re-encoding using a bigger number - maybe 324x242.

Here's a pix that I've zoomed in - all looks fine to me.

Regards, Michael

Andy Harding · March 27th, 2007, 01:01 AM

Thanks for the advice Michael I give it a try, still too test the lens yet but been too busy.

March 16th, 2007, 10:01 AM	#1
Andy Harding Regular Crew Join Date: Feb 2007 Location: Manchester, UK Posts: 82	Banding Issue on footage Hi any one seen this before? Any ideas Lens, camera issue? http://www.newtek.com/forums/showthr...791#post512791

March 23rd, 2007, 11:09 AM	#6
Michael Nistler Major Player Join Date: Aug 2006 Location: Petaluma, CA Posts: 456	Mysterous Bands Hi Andy, The black bands don't seem to appear on your JPEG picture, aside from the normal astigmatism from the human eye blurring the adjacent real black border around the video. However, if you're objecting to the very thin black line that surrounds the entire video, I'd guess the image is cropped a bit much. So if you're encoding by say 320x240, I'd try re-encoding using a bigger number - maybe 324x242. Here's a pix that I've zoomed in - all looks fine to me. Regards, Michael Attached Images

March 16th, 2007, 10:17 AM	#2
John Miller Major Player Join Date: Oct 2005 Location: Hillsborough, NC, USA Posts: 968	I don't see any bands or lines. Do you see this when viewing on a TV rather than a computer display?

March 16th, 2007, 10:28 AM	#3
Andy Harding Regular Crew Join Date: Feb 2007 Location: Manchester, UK Posts: 82	Hi John they run top to bottom light then dark then light not all the way to the edges of the screen, still to test on the TV will be doing that next. My VT4.6 is pretty good though usually if it's on screen it will be on the TV set.

March 21st, 2007, 04:33 PM	#4
John Miller Major Player Join Date: Oct 2005 Location: Hillsborough, NC, USA Posts: 968	Did you confirm the bands show up on the TV?

March 22nd, 2007, 01:18 AM	#5
Andy Harding Regular Crew Join Date: Feb 2007 Location: Manchester, UK Posts: 82	Hi John, yes they do but are much fainter still to try the other lens thought so that will be the next stop if you don't know what your looking at and the main subject is in the center of the TV screen there will not much to worried about just want to know what is causing it camera or lens then take i from there.

March 27th, 2007, 01:01 AM	#7
Andy Harding Regular Crew Join Date: Feb 2007 Location: Manchester, UK Posts: 82	Thanks for the advice Michael I give it a try, still too test the lens yet but been too busy.