vade

Ive spent some hard earned time today with the Decklink Intensity Card.

It most definitely works with a computer driven DVI source with a DVI- 

>HDMI adaptor or cable, so the YUV "consumer" HDMI vs RGB DVI 

computer colorspace "issue" is not a problem per se for the Intensity 

card as was speculated. I have only tested with my MacBook Pro, but I 

would be surprised if this was an issue with other systems.

jit.qt.grab finds the card just fine and will work with colormode 

argb or uyvy and produce proper results either way.

Currently the Decklink drivers support only one card. Even though 

their On Air software sees both cards we have installed, quicktime 

does not. Decklink is aware of this and will be supporting 2 cards 

eventually with a software update, so I am told.

I havent been able to quantify, but there is a noticeable frame lag 

from the output device to the intensity card input and display. It 

seems like 3-5 frames delay, not huge, but there.

My laptop sees the Intensity card and can drive it at 1920x1080 

Interlaced or 1280x720 Progressive. I dont think all systems will be 

able to see and drive the intensity card properly. A friends 12" 

Powerbook did not properly see the 720P, it output 720 interlaced, so 

jit.qt.grab on a 2 x 3.0 Ghz Intel Mac Pro with 8GB ram, x1900 with 

@colormode uyvy @1920x1080 to a videoplane @uyvy = 60fps

@colormode uyvy to the cc.uyvy2rgba.jxs shader, to a jit.gl.slab 

@file td.sinefold.jxs, then mixed with the original texture using one 

of the composite shaders to a videoplane @ rgba, is 60 fps.

the above, but at colormode rgba sans uyvy/rgba conversion shader is 

720p @ colormode argb with the above shaders ran at 50 -55 fps, and 

Everything else (colormode uyvy, etc) ran at 60fps, but the ARGB 

progressive mode has a much much nicer image quality. Drastically 

superior, why would anyone want to deal with Interlacing in this day 

Color differencing (using RGB color mode @720P)

There are very slight color shifts. Using Final Cut Pro to output 

SMTPE video bars @720p. I measured the color accuracy using the 

After Intensity /Jitter to the Mac Pro displayed via GL

Blacks were super black at 0% on both systems

Pedestal was 2.0% local, 2.7% on intensity card, so some luma/gamma 

The colors after going through Intensity card look really good, and 

the shifts were not noticeable in any way, but they are there. Not 

sure if this is a Jitter issue on a Quicktime/Decklink issue, but, at 

the end of the day they are not really an issue. More testing could 

I was also able to record using jit.gl.texture to jit.matrix 

readback, which considering the PCIe bandwidth did not significantly 

lower performance. I had a greater fps hit dropping in a pwindow that 

had use onscreen 1 enabled. Recording the 720p content to motion jpeg 

lowered my framerate to about 35 fps all while driving a full screen 

display @ 1280x720 progressive with slab effects enabled and mixing.

Could not Test video out ironically because we had no HDMI viewing 

monitor. Once they have the second (or hopefully more) card 

supported, this will make a wonderful platform to use for HD.

I hope to test on a PC shortly, but it may be sometime.

It most definitely works with a computer driven DVI source with a DVI- 
 >HDMI adaptor or cable, so the YUV "consumer" HDMI vs RGB DVI  
computer colorspace "issue" is not a problem per se for the Intensity  
card as was speculated. I have only tested with my MacBook Pro, but I  
would be surprised if this was an issue with other systems.

jit.qt.grab finds the card just fine and will work with colormode  
argb or uyvy and produce proper results either way.

Currently the Decklink drivers support only one card. Even though  
their On Air software sees both cards we have installed, quicktime  
does not. Decklink is aware of this and will be supporting 2 cards  
eventually with a software update, so I am told.

I havent been able to quantify, but there is a noticeable frame lag  
from the output device to the intensity card input and display. It  
seems like 3-5 frames delay, not huge, but there.

My laptop sees the Intensity card and can drive it at 1920x1080  
Interlaced or 1280x720 Progressive. I dont think all systems will be  
able to see and drive the intensity card properly. A friends 12"  
Powerbook did not properly see the 720P, it output 720 interlaced, so  
it would not lock up at that resolution.

jit.qt.grab on a 2 x 3.0 Ghz Intel Mac Pro with 8GB ram, x1900 with  
512MB Vram:

@colormode uyvy to the cc.uyvy2rgba.jxs shader, to a jit.gl.slab  
@file td.sinefold.jxs, then mixed with the original texture using one  
of the composite shaders to a videoplane @ rgba, is 60 fps.

the above, but at colormode rgba sans uyvy/rgba conversion shader is  
a paltry 30 fps. :)

720p @ colormode argb with the above shaders ran at 50 -55 fps, and  
looks lovely being progressive and all.

Everything else (colormode uyvy, etc) ran at 60fps, but the ARGB  
progressive mode has a much much nicer image quality. Drastically  
superior, why would anyone want to deal with Interlacing in this day  
and age anyway?

There are very slight color shifts. Using Final Cut Pro to output  
SMTPE video bars @720p. I measured the color accuracy using the  
Digital Color Meter supplied by Apple.

Local 720p Bars (in RGB as percentage)
Red : 70.6% 0. 0.
Blue: 0. 0. 70.6 %
Green: 0. 70.6 0%

After Intensity /Jitter to the Mac Pro displayed via GL
Red: 73.3 0. 0. %
Blue: 0. 0. 73.3 %
Green: 0. 73.3 0.%

Pedestal was 2.0% local, 2.7% on intensity card, so some luma/gamma  
shifting brighter

The colors after going through Intensity card look really good, and   
the shifts were not noticeable in any way, but they are there. Not  
sure if this is a Jitter issue on a Quicktime/Decklink issue, but, at  
the end of the day they are not really an issue. More testing could  
reveal the source of the issue.

I was also able to record using jit.gl.texture to jit.matrix  
readback, which considering the PCIe bandwidth did not significantly  
lower performance. I had a greater fps hit dropping in a pwindow that  
had use onscreen 1 enabled. Recording the 720p content to motion jpeg  
lowered my framerate to about 35 fps all while driving a full screen  
display @ 1280x720 progressive with slab effects enabled and mixing.

Could not Test video out ironically because we had no HDMI viewing  
monitor. Once they have the second (or hopefully more) card  
supported, this will make a wonderful platform to use for HD.

decklink-intensity-card-notes-success

Thanks for this info. Lots of good information. If you want to 

further benchmark (i.e. above 60fps), you can disable vsync for 

What about 1080p 30fps? Is that supported by the card and DVI->HDMI 

As for color quality in UYVY mode if it's useful for more performance 

with multiple sources, you can get nicer gamma correction looking 

footage from a UYVY signal by using cc.uyvy2rgba.exp.jxs with an 

exponent of something like 1.2 (might want to adjust some of the 

other brightness/contrast/saturation controls to your liking too).

Thanks for this info. Lots of good information. If you want to  
further benchmark (i.e. above 60fps), you can disable vsync for  
jit.window.

What about 1080p 30fps? Is that supported by the card and DVI->HDMI  
config?

As for color quality in UYVY mode if it's useful for more performance  
with multiple sources, you can get nicer gamma correction looking  
footage from a UYVY signal by using cc.uyvy2rgba.exp.jxs with an  
exponent of something like 1.2 (might want to adjust some of the  
other brightness/contrast/saturation controls to your liking too).

Unfortunately, 1080p is not supported by the Intensity card, at least 

as stated on Decklinks tech page for the product -

http://decklink.com/products/intensity/techspecs/

and I did not see a progressive option available in my monitors/ 

However, Ive been meaning to ask, is a de-interlacing shader possible/ 

available for 108060i mode? (or, er, any mode?)

Also, I could see no difference with the chroma_smooth option for the 

uyvy2rgba shader, what is the intended purpose?

I can post some picts of the output should it be necessary so we 

arent too vague. Thanks, glad its helpful.

On Apr 12, 2007, at 8:07 PM, Joshua Kit Clayton wrote:

> Thanks for this info. Lots of good information. If you want to 

> further benchmark (i.e. above 60fps), you can disable vsync for 

> What about 1080p 30fps? Is that supported by the card and DVI->HDMI 

> As for color quality in UYVY mode if it's useful for more 

> performance with multiple sources, you can get nicer gamma 

> correction looking footage from a UYVY signal by using 

> cc.uyvy2rgba.exp.jxs with an exponent of something like 1.2 (might 

> want to adjust some of the other brightness/contrast/saturation 

Unfortunately, 1080p is not supported by the Intensity card, at least  
as stated on Decklinks tech page for the product -

and I did not see a progressive option available in my monitors/ 
displays for 1920x1080.

However, Ive been meaning to ask, is a de-interlacing shader possible/ 
available for 108060i mode? (or, er, any mode?)

Also, I could see no difference with the chroma_smooth option for the  
uyvy2rgba shader, what is the intended purpose?

I can post some picts of the output should it be necessary so we  
arent too vague. Thanks, glad its helpful.

> Hi Anton,
>
> Thanks for this info. Lots of good information. If you want to  
> further benchmark (i.e. above 60fps), you can disable vsync for  
> jit.window.
>
>> 1920x1080 Interlaced:
>
> What about 1080p 30fps? Is that supported by the card and DVI->HDMI  
> config?
>
> As for color quality in UYVY mode if it's useful for more  
> performance with multiple sources, you can get nicer gamma  
> correction looking footage from a UYVY signal by using  
> cc.uyvy2rgba.exp.jxs with an exponent of something like 1.2 (might  
> want to adjust some of the other brightness/contrast/saturation  
> controls to your liking too).
>

> Unfortunately, 1080p is not supported by the Intensity card, at least as

> stated on Decklinks tech page for the product -

> and I did not see a progressive option available in my monitors/displays

> However, Ive been meaning to ask, is a de-interlacing shader

> possible/available for 108060i mode? (or, er, any mode?)

> Also, I could see no difference with the chroma_smooth option for the

> uyvy2rgba shader, what is the intended purpose?

> I can post some picts of the output should it be necessary so we arent too

> On Apr 12, 2007, at 8:07 PM, Joshua Kit Clayton wrote:

> Thanks for this info. Lots of good information. If you want to further

> benchmark (i.e. above 60fps), you can disable vsync for jit.window.

> What about 1080p 30fps? Is that supported by the card and DVI->HDMI

> As for color quality in UYVY mode if it's useful for more performance with

> multiple sources, you can get nicer gamma correction looking footage from a

> UYVY signal by using cc.uyvy2rgba.exp.jxs with an exponent of something

> like 1.2 (might want to adjust some of the other

> brightness/contrast/saturation controls to your liking too).

On 4/13/07, vade  wrote:
>
> Unfortunately, 1080p is not supported by the Intensity card, at least as
> stated on Decklinks tech page for the product -
> http://decklink.com/products/intensity/techspecs/
>
> and I did not see a progressive option available in my monitors/displays
> for 1920x1080.
> However, Ive been meaning to ask, is a de-interlacing shader
> possible/available for 108060i mode? (or, er, any mode?)
>
> Also, I could see no difference with the chroma_smooth option for the
> uyvy2rgba shader, what is the intended purpose?
>
> I can post some picts of the output should it be necessary so we arent too
> vague. Thanks, glad its helpful.
>
>
>
> On Apr 12, 2007, at 8:07 PM, Joshua Kit Clayton wrote:
>
> Hi Anton,
>
> Thanks for this info. Lots of good information. If you want to further
> benchmark (i.e. above 60fps), you can disable vsync for jit.window.
>
> 1920x1080 Interlaced:
>
>
> What about 1080p 30fps? Is that supported by the card and DVI->HDMI
> config?
>
> As for color quality in UYVY mode if it's useful for more performance with
> multiple sources, you can get nicer gamma correction looking footage from a
> UYVY signal by using cc.uyvy2rgba.exp.jxs with an exponent of something
> like 1.2 (might want to adjust some of the other
> brightness/contrast/saturation controls to your liking too).
>
>
>
> *v a d e //*
>
> *www.vade.info*
> *abstrakt.vade.info*
>
>
>
>
>
>

I forgot to add the @dimscale 2. 1. to the cc.uyvy2rgba.jxs shader. 

It looks lovely now, no noticeable difference and very fast. Ive got 

a bunch of performance tests/color tests from PD, Quartz Composer and 

Jitter seems to perform highest of all 3 'diy' patching platforms. QC 

has some really odd issues, lagging up to 45 frames (!!!) behind in 

10 bit mode, sometimes less, sometimes more. 8 bit seems to lag more 

Gem works nicely, same order of performance as Jitter, but, its a bit 

rough around the edges and theres some things to know to get the most 

performance out of the system, had to ask because it seemed really 

I forgot to add the @dimscale 2. 1. to the cc.uyvy2rgba.jxs shader.  
It looks lovely now, no noticeable difference and very fast. Ive got  
a bunch of performance tests/color tests from PD, Quartz Composer and  
Jitter.

Jitter seems to perform highest of all 3 'diy' patching platforms. QC  
has some really odd issues, lagging up to 45 frames (!!!) behind in  
10 bit mode, sometimes less, sometimes more. 8 bit seems to lag more  
than Jitter or PD/Gem

Gem works nicely, same order of performance as Jitter, but, its a bit  
rough around the edges and theres some things to know to get the most  
performance out of the system, had to ask because it seemed really  
slow from the get go.

Hello Vade, this is good news. Interesting to see how the people at 

Blackmagic don't even know themselves what they actually make...;-)

Did you find out why your laptop works and the 12 inch not? does it 

have to do with the graphics card? did you test with a mac pro as input?

> Ive spent some hard earned time today with the Decklink Intensity 

> It most definitely works with a computer driven DVI source with a 

> DVI->HDMI adaptor or cable, so the YUV "consumer" HDMI vs RGB DVI 

> computer colorspace "issue" is not a problem per se for the 

> Intensity card as was speculated. I have only tested with my 

> MacBook Pro, but I would be surprised if this was an issue with 

> jit.qt.grab finds the card just fine and will work with colormode 

> argb or uyvy and produce proper results either way.

> Currently the Decklink drivers support only one card. Even though 

> their On Air software sees both cards we have installed, quicktime 

> does not. Decklink is aware of this and will be supporting 2 cards 

> eventually with a software update, so I am told.

> I havent been able to quantify, but there is a noticeable frame lag 

> from the output device to the intensity card input and display. It 

> seems like 3-5 frames delay, not huge, but there.

> My laptop sees the Intensity card and can drive it at 1920x1080 

> Interlaced or 1280x720 Progressive. I dont think all systems will 

> be able to see and drive the intensity card properly. A friends 12" 

> Powerbook did not properly see the 720P, it output 720 interlaced, 

> so it would not lock up at that resolution.

> jit.qt.grab on a 2 x 3.0 Ghz Intel Mac Pro with 8GB ram, x1900 with 

> @colormode uyvy @1920x1080 to a videoplane @uyvy = 60fps

> @colormode uyvy to the cc.uyvy2rgba.jxs shader, to a jit.gl.slab 

> @file td.sinefold.jxs, then mixed with the original texture using 

> one of the composite shaders to a videoplane @ rgba, is 60 fps.

> the above, but at colormode rgba sans uyvy/rgba conversion shader 

> 720p @ colormode argb with the above shaders ran at 50 -55 fps, and 

> looks lovely being progressive and all.

> Everything else (colormode uyvy, etc) ran at 60fps, but the ARGB 

Hello Vade, this is good news. Interesting to see how the people at  
Blackmagic don't even know themselves what they actually make...;-)
Did you find out why your laptop works and the 12 inch not? does it  
have to do with the graphics card? did you test with a mac pro as input?
Best Lucas

> Ive spent some hard earned time today with the Decklink Intensity  
> Card.
>
> It most definitely works with a computer driven DVI source with a  
> DVI->HDMI adaptor or cable, so the YUV "consumer" HDMI vs RGB DVI  
> computer colorspace "issue" is not a problem per se for the  
> Intensity card as was speculated. I have only tested with my  
> MacBook Pro, but I would be surprised if this was an issue with  
> other systems.
>
> jit.qt.grab finds the card just fine and will work with colormode  
> argb or uyvy and produce proper results either way.
>
> Currently the Decklink drivers support only one card. Even though  
> their On Air software sees both cards we have installed, quicktime  
> does not. Decklink is aware of this and will be supporting 2 cards  
> eventually with a software update, so I am told.
>
> I havent been able to quantify, but there is a noticeable frame lag  
> from the output device to the intensity card input and display. It  
> seems like 3-5 frames delay, not huge, but there.
>
> My laptop sees the Intensity card and can drive it at 1920x1080  
> Interlaced or 1280x720 Progressive. I dont think all systems will  
> be able to see and drive the intensity card properly. A friends 12"  
> Powerbook did not properly see the 720P, it output 720 interlaced,  
> so it would not lock up at that resolution.
>
> Back to Jitter:
>
> jit.qt.grab on a 2 x 3.0 Ghz Intel Mac Pro with 8GB ram, x1900 with  
> 512MB Vram:
>
> 1920x1080 Interlaced:
>
> @colormode uyvy @1920x1080 to a videoplane @uyvy = 60fps
>
> @colormode uyvy to the cc.uyvy2rgba.jxs shader, to a jit.gl.slab  
> @file td.sinefold.jxs, then mixed with the original texture using  
> one of the composite shaders to a videoplane @ rgba, is 60 fps.
>
> the above, but at colormode rgba sans uyvy/rgba conversion shader  
> is a paltry 30 fps. :)
>
> 1280x720 Progressive:
>
> 720p @ colormode argb with the above shaders ran at 50 -55 fps, and  
> looks lovely being progressive and all.
>
> Everything else (colormode uyvy, etc) ran at 60fps, but the ARGB  
> progressive mode has a much much nicer image quality. Drastically  
> superior, why would anyone want to deal with Interlacing in this  
> day and age anyway?
>
> Color differencing (using RGB color mode @720P)
>
> There are very slight color shifts. Using Final Cut Pro to output  
> SMTPE video bars @720p. I measured the color accuracy using the  
> Digital Color Meter supplied by Apple.
>
> Local 720p Bars (in RGB as percentage)
> Red : 70.6% 0. 0.
> Blue: 0. 0. 70.6 %
> Green: 0. 70.6 0%
>
> After Intensity /Jitter to the Mac Pro displayed via GL
> Red: 73.3 0. 0. %
> Blue: 0. 0. 73.3 %
> Green: 0. 73.3 0.%
>
> Blacks were super black at 0% on both systems
>
> Pedestal was 2.0% local, 2.7% on intensity card, so some luma/gamma  
> shifting brighter
>
> The colors after going through Intensity card look really good,  
> and  the shifts were not noticeable in any way, but they are there.  
> Not sure if this is a Jitter issue on a Quicktime/Decklink issue,  
> but, at the end of the day they are not really an issue. More  
> testing could reveal the source of the issue.
>
> I was also able to record using jit.gl.texture to jit.matrix  
> readback, which considering the PCIe bandwidth did not  
> significantly lower performance. I had a greater fps hit dropping  
> in a pwindow that had use onscreen 1 enabled. Recording the 720p  
> content to motion jpeg lowered my framerate to about 35 fps all  
> while driving a full screen display @ 1280x720 progressive with  
> slab effects enabled and mixing.
>
> Could not Test video out ironically because we had no HDMI viewing  
> monitor. Once they have the second (or hopefully more) card  
> supported, this will make a wonderful platform to use for HD.
>
> This is really good news.
>
> I hope this is helpful to the list.
>
> I hope to test on a PC shortly, but it may be sometime.
>
>
> v a d e //
>
> www.vade.info
> abstrakt.vade.info
>
>
>


The 12 inch will drive the Intensity card at 1920x1080 interlaced and 

480 progressive, it just would not see the progressive 720p. The 

intensity will not lock to interlaced 720 :)

On Apr 14, 2007, at 4:43 PM, subzero wrote:

> Hello Vade, this is good news. Interesting to see how the people at 

> Blackmagic don't even know themselves what they actually make...;-)

> Did you find out why your laptop works and the 12 inch not? does it 

> have to do with the graphics card? did you test with a mac pro as 

> On Apr 13, 2007, at 1:45 AM, vade wrote:

>> Ive spent some hard earned time today with the Decklink Intensity 

>> It most definitely works with a computer driven DVI source with a 

>> DVI->HDMI adaptor or cable, so the YUV "consumer" HDMI vs RGB DVI 

>> computer colorspace "issue" is not a problem per se for the 

>> Intensity card as was speculated. I have only tested with my 

>> MacBook Pro, but I would be surprised if this was an issue with 

>> jit.qt.grab finds the card just fine and will work with colormode 

>> argb or uyvy and produce proper results either way.

>> Currently the Decklink drivers support only one card. Even though 

>> their On Air software sees both cards we have installed, quicktime 

>> does not. Decklink is aware of this and will be supporting 2 cards 

>> eventually with a software update, so I am told.

>> I havent been able to quantify, but there is a noticeable frame 

>> lag from the output device to the intensity card input and 

>> display. It seems like 3-5 frames delay, not huge, but there.

>> My laptop sees the Intensity card and can drive it at 1920x1080 

>> Interlaced or 1280x720 Progressive. I dont think all systems will 

>> be able to see and drive the intensity card properly. A friends 

>> 12" Powerbook did not properly see the 720P, it output 720 

>> interlaced, so it would not lock up at that resolution.

>> jit.qt.grab on a 2 x 3.0 Ghz Intel Mac Pro with 8GB ram, x1900 

>> @colormode uyvy @1920x1080 to a videoplane @uyvy = 60fps

>> @colormode uyvy to the cc.uyvy2rgba.jxs shader, to a jit.gl.slab 

Decklink Intensity Card Notes - Success!