AspectHD 2.5 beta lumenance bump at DVinfo.net

David Cherniack · November 29th, 2004, 07:31 PM

In the demo on my system when I hit play in PPro 1.5 the lumenance drops a few ire (7.5?) in the monitor window. It doesn't seem to be a config issue.

David Newman · November 29th, 2004, 08:10 PM

It means you have an NVIDIA card. When we playback we use the YUV overlay for desktop and secondary displays. The level change you are seeing is because the NVIDIA cards are incorrectly calibrated for YUV data. Go into your NVIDIA overlay controls and set your saturation to 100% (it defaults to about 115%) and set you gamma to 1.16 and your overlay brightness to around 110% (this is from memory.) This will fix the NVIDIA calibration issue (with a few tweaks of your own.)

This video card fault stems from the fact that YUV white is officially 235 and computer RGB white is 255. The NVIDIA card seems to think YUV white is 255, causing everything to be darker. ATI doesn't do this.

David Cherniack · November 29th, 2004, 08:15 PM

Wow. You ARE the CTO. Thanks for the prompt reply.

John Hdmad Young · March 15th, 2005, 09:33 PM

my problem with lumenance bump still persists - trying the method David instructed without success.

It happened to v2.5. Now I have upgraded to v3.0 (Premiere Pro 1.5.1 as well). This lumenance bump issue remains.

But in Premiere itself (i.e. 720x576), no such phenomenon.

Please help!

David Newman · March 15th, 2005, 11:16 PM

It is definitely the calibration of your video card (most likely a NVidia as ATI doesn't tend to do this.) Aspect HD plays back using YUV for speed and native color accuracy, the standard Premiere uses RGB (that is why there is a difference -- and one of the many reasons Aspect HD is up to 5X faster.) You should use the suggested controls the calibrate your overlay (YUV) output of your video card. Note: Microsoft Mediaplayer also uses the overlay for video playback, so this is not just an Aspect HD issue.

David Newman
CTO, CineForm

Marc Colemont · October 30th, 2006, 03:26 AM

Quote:

Originally Posted by David Newman

It is definitely the calibration of your video card (most likely a NVidia as ATI doesn't tend to do this.) Aspect HD plays back using YUV for speed and native color accuracy, the standard Premiere uses RGB (that is why there is a difference -- and one of the many reasons Aspect HD is up to 5X faster.) You should use the suggested controls the calibrate your overlay (YUV) output of your video card. Note: Microsoft Mediaplayer also uses the overlay for video playback, so this is not just an Aspect HD issue.

David Newman
CTO, CineForm

Hi David,

On my Machine with ATI card I have the same issue. When I play from time line in Adobe PPro 2.0 the brightness goes up. I searched on your site but I couldn't find a FAQ handling this issue. I did then a search on this forum and ran into this old post. I have a ATI 9700 card in a XPpro SP2 system. Is there a specific setting to do, just like with the nVidia Cards?

Giroud Francois · October 30th, 2006, 03:40 AM

from pure logical point of view, you said that premiere is displaying wrongly the picture. Then you ask to correct the display when overlay.
This will make the picture the same in both display mode.
But isn't it then the wrong picture we look at (too much brightness.)?

K. Tessman · October 30th, 2006, 01:39 PM

Quote:

Originally Posted by David Newman

It is definitely the calibration of your video card (most likely a NVidia as ATI doesn't tend to do this.)

My ATI card certainly does this. This has come up a few times with a few people, both here and at the Adobe forums, without resolution.

That said, I'm not sure it's a Cineform issue. It happens only in Adobe apps (for me), i.e., Premiere and AE.

Marc Colemont · October 31st, 2006, 05:42 AM

Quote:

Originally Posted by K. Tessman

My ATI card certainly does this. This has come up a few times with a few people, both here and at the Adobe forums, without resolution.

That said, I'm not sure it's a Cineform issue. It happens only in Adobe apps (for me), i.e., Premiere and AE.

I only see it by using the Cineform presets that the brightness goes up while playing from the time-line. With the standard DV presets I don't have the issue at all. I use the Cineform preset 1280x720p 25 frames.
I can't roll back from build 71, since I need the batch conversion of HDlink to work properly.

David Newman · October 31st, 2006, 09:04 AM

ATI cards are calibrated for the Overlay surface on. Give that a try.

Marc Colemont · November 2nd, 2006, 02:20 AM

I have re-installed the build 71 and now everything is fine again.
I also had suddenly that when playing from the timeline the time-line jumped strait to the last frame without playing anything. After removing and installing build 71 that problem was also fixed. I think it had to do that I installed build71 previously without clicking on NO of the two pop-up boxes during uninstall. I clicked Yes on keep the adobe presets and keep the codec for media-player.

November 29th, 2004, 07:31 PM	#1
David Cherniack Regular Crew Join Date: Sep 2003 Location: Toronto Posts: 186	AspectHD 2.5 beta lumenance bump In the demo on my system when I hit play in PPro 1.5 the lumenance drops a few ire (7.5?) in the monitor window. It doesn't seem to be a config issue.

November 29th, 2004, 08:10 PM	#2
David Newman CTO, CineForm Inc. Join Date: Jul 2003 Location: Cardiff-by-the-Sea, California Posts: 8,095	It means you have an NVIDIA card. When we playback we use the YUV overlay for desktop and secondary displays. The level change you are seeing is because the NVIDIA cards are incorrectly calibrated for YUV data. Go into your NVIDIA overlay controls and set your saturation to 100% (it defaults to about 115%) and set you gamma to 1.16 and your overlay brightness to around 110% (this is from memory.) This will fix the NVIDIA calibration issue (with a few tweaks of your own.) This video card fault stems from the fact that YUV white is officially 235 and computer RGB white is 255. The NVIDIA card seems to think YUV white is 255, causing everything to be darker. ATI doesn't do this. __________________ David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman

March 15th, 2005, 11:16 PM	#5
David Newman CTO, CineForm Inc. Join Date: Jul 2003 Location: Cardiff-by-the-Sea, California Posts: 8,095	It is definitely the calibration of your video card (most likely a NVidia as ATI doesn't tend to do this.) Aspect HD plays back using YUV for speed and native color accuracy, the standard Premiere uses RGB (that is why there is a difference -- and one of the many reasons Aspect HD is up to 5X faster.) You should use the suggested controls the calibrate your overlay (YUV) output of your video card. Note: Microsoft Mediaplayer also uses the overlay for video playback, so this is not just an Aspect HD issue. David Newman CTO, CineForm __________________ David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman

October 31st, 2006, 09:04 AM	#10
David Newman CTO, CineForm Inc. Join Date: Jul 2003 Location: Cardiff-by-the-Sea, California Posts: 8,095	ATI cards are calibrated for the Overlay surface on. Give that a try. __________________ David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman

November 29th, 2004, 08:15 PM	#3
David Cherniack Regular Crew Join Date: Sep 2003 Location: Toronto Posts: 186	Wow. You ARE the CTO. Thanks for the prompt reply.

March 15th, 2005, 09:33 PM	#4
John Hdmad Young New Boot Join Date: Mar 2005 Location: hong kong Posts: 8	my problem with lumenance bump still persists - trying the method David instructed without success. It happened to v2.5. Now I have upgraded to v3.0 (Premiere Pro 1.5.1 as well). This lumenance bump issue remains. But in Premiere itself (i.e. 720x576), no such phenomenon. Please help!

October 30th, 2006, 03:40 AM	#7
Giroud Francois Inner Circle Join Date: Feb 2004 Location: switzerland Posts: 2,133	from pure logical point of view, you said that premiere is displaying wrongly the picture. Then you ask to correct the display when overlay. This will make the picture the same in both display mode. But isn't it then the wrong picture we look at (too much brightness.)?

November 2nd, 2006, 02:20 AM	#11
Marc Colemont Major Player Join Date: Nov 2005 Location: Belgium Posts: 695	I have re-installed the build 71 and now everything is fine again. I also had suddenly that when playing from the timeline the time-line jumped strait to the last frame without playing anything. After removing and installing build 71 that problem was also fixed. I think it had to do that I installed build71 previously without clicking on NO of the two pop-up boxes during uninstall. I clicked Yes on keep the adobe presets and keep the codec for media-player.