DVDA grey banding at DVinfo.net

Adam Letch · February 10th, 2008, 07:55 PM

Hi guys,

I've done a few searches and haven't found and a exact answer, and a lot of the answers were regarding NTSC so I don't know if it's different with PAL. But basically I've got a 720 50p job which I'm mastering to PAL SD Widescreen.
I use the option to stretch to fit or fill(not in front of Vegas right now)screen, and not in all, but just a few events, I get a grey band across the bottom of the screen, it seems to be only where I use text with the black background media.
Now I've read that some TV's don't decode the black bars well, and it comes out grey, is this what I'm seeing here or have I missed a setting somewhere.
I'd really appreciate some help on this one, got a client coming around tomorrow to recieve their DVD and this just makes the DVD unprofessional.
Thanks in advance

Adam

Andy Wilkinson · February 11th, 2008, 02:21 AM

Not sure about this but in view of your tight deadline I'll write it anyway! On those events I'd check the Pan and Crop to make sure you did not accidentally input a slightly out of line 16 by 9 frame (maybe a few dozen lines ....approx... too high or too low at the bottom.) It sounds like one of your events used in the overlay is NOT true 16 by 9 in shape but more square in shape, (and bottom aligned, which is why the top band is still black.)

Adam Letch · February 12th, 2008, 07:33 PM

it appears to be the whole 4:3 can't decode properly thing, looks great on widescreen, no good on my TV.

cheers

Adam

Douglas Spotted Eagle · February 14th, 2008, 12:30 AM

You might put black bar masks in place vs the way the widescreen is decoding. It's not common for broadcast, but there is nothing wrong with putting superblacks on a non-broadcast DVD.

February 10th, 2008, 07:55 PM	#1
Adam Letch Major Player Join Date: Feb 2006 Location: Perth, Western Australia Posts: 414	DVDA grey banding Hi guys, I've done a few searches and haven't found and a exact answer, and a lot of the answers were regarding NTSC so I don't know if it's different with PAL. But basically I've got a 720 50p job which I'm mastering to PAL SD Widescreen. I use the option to stretch to fit or fill(not in front of Vegas right now)screen, and not in all, but just a few events, I get a grey band across the bottom of the screen, it seems to be only where I use text with the black background media. Now I've read that some TV's don't decode the black bars well, and it comes out grey, is this what I'm seeing here or have I missed a setting somewhere. I'd really appreciate some help on this one, got a client coming around tomorrow to recieve their DVD and this just makes the DVD unprofessional. Thanks in advance Adam

February 11th, 2008, 02:21 AM	#2
Andy Wilkinson Inner Circle Join Date: Sep 2007 Location: Cambridge UK Posts: 2,853	Not sure about this but in view of your tight deadline I'll write it anyway! On those events I'd check the Pan and Crop to make sure you did not accidentally input a slightly out of line 16 by 9 frame (maybe a few dozen lines ....approx... too high or too low at the bottom.) It sounds like one of your events used in the overlay is NOT true 16 by 9 in shape but more square in shape, (and bottom aligned, which is why the top band is still black.) __________________ Andy K Wilkinson - https://www.shootingimage.co.uk Cambridge (UK) Corporate Video Production

February 12th, 2008, 07:33 PM	#3
Adam Letch Major Player Join Date: Feb 2006 Location: Perth, Western Australia Posts: 414	Thanks for trying Andy it appears to be the whole 4:3 can't decode properly thing, looks great on widescreen, no good on my TV. cheers Adam

February 14th, 2008, 12:30 AM	#4
Douglas Spotted Eagle VASST Join Date: Jan 2004 Location: Stockton, UT Posts: 5,648	You might put black bar masks in place vs the way the widescreen is decoding. It's not common for broadcast, but there is nothing wrong with putting superblacks on a non-broadcast DVD. __________________ Douglas Spotted Eagle/Spot Author, producer, composer Certified Sony Vegas Trainer http://www.vasst.com