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Old 10-30-2014, 09:16 PM   #1
Zorro
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Default Edius 7.40: problem with Quicksync

I noticed this some days ago in 7.32 and waited for the new version but the problem doesn't go away. This is what I'm doing:

I have an UHD project and want to export to H.264/AVC using Quicksync. Although I can choose 'hardware encoding' it isn't used because CPU usage is 100% and render speed is the same as without 'hardware encoding'.

Now the interesting part:

When I choose an export resolution of 1920x1080 or smaller everthing works as expected. Low CPU usage and blazing fast.

So the question is whether it is an Edius problem or a limitation of Quicksync.

Inputs welcome.
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Old 10-30-2014, 09:36 PM   #2
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I don`t think QS is supported at UHD
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Old 10-30-2014, 09:39 PM   #3
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Quote:
Originally Posted by John Lewis View Post
I don`t think QS is supported at UHD
I didn't find any info about it on the Intel site.

Since you can choose Quicksync in the export window the impression is given that it works.
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Old 10-30-2014, 09:56 PM   #4
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I just did the export with my system and it smokes. You have to be using a Haswell chip.
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Last edited by Jerry; 10-31-2014 at 01:05 AM.
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Old 10-31-2014, 07:42 AM   #5
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Quote:
Originally Posted by Jerry View Post
I just did the export with my system and it smokes. You have to be using a Haswell chip.
Dear Jerry, can you please provide a source for your Statement regarding the need for Haswell?

How much faster is Quicksync rendering on your machine compared to CPU only?

When you use Quicksync for export how high is the CPU usage?

Last edited by Zorro; 10-31-2014 at 09:50 AM.
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Old 10-31-2014, 11:13 AM   #6
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Doing the same test with my 3770k and my 4790k the Haswell chip will encode with UHD resolutions and the Ivybridge would not.
Here is a video talking about the 4k encoding with Haswell.
http://www.tweaktown.com/news/32897/...ime/index.html

So, what processor are you using to test this feature?

Test clip is a 3840x2160 60p 5;18 XAVC clip (thanks AL), in a 3840x2160 60p project

TO AVC
CPU: 30 seconds
QS: 6 seconds

My CPU usage bounces between 36% and 70% with QS
My CPU usage bounces between 85% and 100% without QS

TO XAVCS
CPU: 19 seconds
QS: 6 seconds

AVCULTRA is not yet fully implemented.
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Last edited by Jerry; 10-31-2014 at 11:28 AM.
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Old 10-31-2014, 12:04 PM   #7
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Jerry, thanks for testing.

I just got the info from tech support that a Haswell is needed for Quicksync UHD output.
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