Saturday, December 22, 2018

[Avid-L2] Follow up on 8 vs. 10 bit effecting alpha channel video level

 

I've now confirmed on two different MC stations that the timeline quality setting effects the video level of the alpha channel when viewed in the GUI interface and the output of a Nitris DX.  This happens on imported matte keys and title tool.  To see it make a title and cut it into a sequence.  Step into the title and view the alpha channel.  Now toggle timeline quality settings.  for Yellow, Yellow/Green and Green the Alpha channel will be full range but once the timeline is toggled to 10bit Green the alpha channel changes to legal level.

On the second station I tested it on there was no output hardware but the change in level was visible on the GUI Rec Monitor.  Interestingly the internal waveform in color correction mode always display Full range for the alpha channel even in 10bit green but the Rec monitor GUI showed the level jump.  On my symphony Nitris DX the DX output shows the level jumps.

I don't see this effecting the quality of the key so it seems like there is some under the hood signal flow that Avid tracks an Alpha in a different way.  My understanding is regardless of how a matte key graphic is imported scaled Full Range to Legal  or no scaling treat as legal the alpha is still Full Range, please correct me if this is incorrect.

I just don't understand how 8bit vs 10 bit should effect video level displayed for on the GUI and output hardware.  What's the little gremlin going on.  I've seen this behavior for years without realizing it was tied to timeline quality settings.  I use to notice that when outputting alpha channels to tape when I went into digital cut mode the level would drop.  I hadn't noticed that the digital cut tool was forcing the timeline quality to 10bit green during a digital cut.  Now I see what's causing the level shift I just understand why this is happening.

John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net

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Posted by: John Moore <bigfish@pacbell.net>
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Posted by Video Geek Squad at 7:42 PM 0 comments

Friday, December 21, 2018

Re: [Avid-L2] OT - LEE MICHAELS "Do You Know What I Mean"

 

Arthur --

I was always a fan Lee Michaels -- Heighty High -- and I saw your Hasbeens video.    Please contact me off-list --

Thanks.

-- Sol

sol-dot-fischler-at-yahoo-dot-com
 




From: "Arthur Springer avidlist@yahoo.com [Avid-L2]" <Avid-L2@yahoogroups.com>
To: "Avid-L2@yahoogroups.com" <Avid-L2@yahoogroups.com>
Sent: Monday, December 17, 2018 3:22 PM
Subject: [Avid-L2] OT - LEE MICHAELS "Do You Know What I Mean"

 
I'm helping edit and produce my friend Lee Michaels new YouTube channel (Pathetic Hasbeens) which will showcase well known talented musicians. Lee had a big hit song in the early 70s called "Do You Know What I Mean." We've just posted a test clip that you can view at this link.


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Posted by: Sol Fischler <sol.fischler@yahoo.com>
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this is the Avid-L2

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Posted by Video Geek Squad at 11:20 AM 0 comments

Re: [Avid-L2] Mac in one room, monitors in another.

 

https://www.gefen.com/products/all/extenders/dvi


We have two different variants of their cat5 dvi extenders.  They suck on one level, but on another level have worked more or less reliably, HD, for years.  (The set in my bay have to be restarted about every other day as they seem to get confused).  I can't exactly recommend them whole-heartedly, but I don't know a better option.

Maybe try out the newer fiber optic ones?

GH
________________________
Greg Huson
Secret Headquarters, Inc
Greg (at) SecretHQ.com

On Dec 21, 2018, at 07:01, Gowanus Canal gowanuscanalstinks@gmail.com [Avid-L2] <Avid-L2@yahoogroups.com> wrote:

 

Assuming MP 2013, optical thunderbolt then a TB dock in the room?

DQS

> On Dec 21, 2018, at 9:16 AM, Marcus gen@rail-net.co.uk [Avid-L2] <Avid-L2@yahoogroups.com> wrote:
>
> Hi All,
>
> So with the computer in the rack in another room with all the boxes and
> stuff (thinking Avid or Protools here) and the monitors in a nice quiet
> room...... What are we all using to carry the signals from the good old
> display port on the Mac Pro to monitors in another room. The HDMI port
> is fine and will drive a nice long (10-20m) cable. But the display ports
> lack the 'oompfh' to drive long cables via an adaptor. I.e can't pop a
> 15m VGA on the end of a display port adaptor.
>
> I have, in the past, used a display port to VGA and then some powered
> (at one end only, which is handy) VGA Cat 5 extenders for the two edit
> screens and HDMI for the video monitor. But this will not work (well) on
> the higher resolutions above 1920x1080. Plus throwing in USB extensions
> for the mouse keyboard combinations.
>
> Anyone got any other solutions, bank breaking or not.
>
> Cheers,
>
> Marcus
>
>
>
> ------------------------------------
> Posted by: Marcus <gen@rail-net.co.uk>
> ------------------------------------
>
> this is the Avid-L2
> ------------------------------------
>
> Yahoo Groups Links
>
>
>

__._,_.___
Posted by: Greg Huson <greg@secrethq.com>
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (3)
Have you tried the highest rated email app?
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.
this is the Avid-L2

SPONSORED LINKS
.

__,_._,___
Posted by Video Geek Squad at 7:39 AM 0 comments

Re: [Avid-L2] Mac in one room, monitors in another.

 

Assuming MP 2013, optical thunderbolt then a TB dock in the room?

DQS

> On Dec 21, 2018, at 9:16 AM, Marcus gen@rail-net.co.uk [Avid-L2] <Avid-L2@yahoogroups.com> wrote:
>
> Hi All,
>
> So with the computer in the rack in another room with all the boxes and
> stuff (thinking Avid or Protools here) and the monitors in a nice quiet
> room...... What are we all using to carry the signals from the good old
> display port on the Mac Pro to monitors in another room. The HDMI port
> is fine and will drive a nice long (10-20m) cable. But the display ports
> lack the 'oompfh' to drive long cables via an adaptor. I.e can't pop a
> 15m VGA on the end of a display port adaptor.
>
> I have, in the past, used a display port to VGA and then some powered
> (at one end only, which is handy) VGA Cat 5 extenders for the two edit
> screens and HDMI for the video monitor. But this will not work (well) on
> the higher resolutions above 1920x1080. Plus throwing in USB extensions
> for the mouse keyboard combinations.
>
> Anyone got any other solutions, bank breaking or not.
>
> Cheers,
>
> Marcus
>
>
>
> ------------------------------------
> Posted by: Marcus <gen@rail-net.co.uk>
> ------------------------------------
>
> this is the Avid-L2
> ------------------------------------
>
> Yahoo Groups Links
>
>
>

__._,_.___
Posted by: Gowanus Canal <gowanuscanalstinks@gmail.com>
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (2)
Have you tried the highest rated email app?
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.
this is the Avid-L2

SPONSORED LINKS
.

__,_._,___
Posted by Video Geek Squad at 7:01 AM 0 comments

[Avid-L2] Mac in one room, monitors in another.

 

Hi All,

So with the computer in the rack in another room with all the boxes and
stuff (thinking Avid or Protools here) and the monitors in a nice quiet
room...... What are we all using to carry the signals from the good old
display port on the Mac Pro to monitors in another room. The HDMI port
is fine and will drive a nice long (10-20m) cable. But the display ports
lack the 'oompfh' to drive long cables via an adaptor. I.e can't pop a
15m VGA on the end of a display port adaptor.

I have, in the past, used a display port to VGA and then some powered
(at one end only, which is handy) VGA Cat 5 extenders for the two edit
screens and HDMI for the video monitor. But this will not work (well) on
the higher resolutions above 1920x1080. Plus throwing in USB extensions
for the mouse keyboard combinations.

Anyone got any other solutions, bank breaking or not.

Cheers,

Marcus

__._,_.___
Posted by: Marcus <gen@rail-net.co.uk>
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (1)
Have you tried the highest rated email app?
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.
this is the Avid-L2

SPONSORED LINKS
.

__,_._,___
Posted by Video Geek Squad at 6:16 AM 0 comments
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