Downrez to help performance? at DVinfo.net

Morten Gjerstad · May 14th, 2007, 03:20 AM

I'm getting ready to edit a large project with over 30 hours of raw footage with Aspect HD in Premiere Pro 2. The native resolution of my footage is 1440x1080, but I'm thinking of downrezing everything to 1280x720 with HDLink to help editing performance in Premiere. Will this in any way have an effect?

Richard Leadbetter · May 14th, 2007, 05:18 AM

The stress on the decoder will obviously be reduced, but what spec is your PC? Just about any modern dual core system should be able to handle the specs of your footage with much aplomb.

Peter Ferling · May 14th, 2007, 07:30 AM

The fact that you're going progressive on a progressive system is good.
1280x720 will be easier on the system and you could do more layers, or see less render bars.
If you're final output is SD, then you're still editing with higher quality.
You might take a hit in longer encode times on the front end, as I believe the m2t file is captured to a temp file, then it's convert and scaled (in your case) to 720p avi.

Do a small test. Capture a tape at with 1280x720p scaling and compare.

Morten Gjerstad · May 14th, 2007, 08:20 AM

I have a dualcore system with 2 gigs of ram, but I've experienced skipping in both video and audio while playing back the timeline when I have many elements in the project file and on the timeline. On smaller projects things work without a hitch.

May 14th, 2007, 03:20 AM	#1
Morten Gjerstad Regular Crew Join Date: Nov 2005 Posts: 29	Downrez to help performance? I'm getting ready to edit a large project with over 30 hours of raw footage with Aspect HD in Premiere Pro 2. The native resolution of my footage is 1440x1080, but I'm thinking of downrezing everything to 1280x720 with HDLink to help editing performance in Premiere. Will this in any way have an effect?

May 14th, 2007, 07:30 AM	#3
Peter Ferling Trustee Join Date: May 2005 Location: Wyomissing, PA Posts: 1,141 Images: 57	The fact that you're going progressive on a progressive system is good. 1280x720 will be easier on the system and you could do more layers, or see less render bars. If you're final output is SD, then you're still editing with higher quality. You might take a hit in longer encode times on the front end, as I believe the m2t file is captured to a temp file, then it's convert and scaled (in your case) to 720p avi. Do a small test. Capture a tape at with 1280x720p scaling and compare. __________________ Pete Ferling http://ferling.net It's never a mistake if you learn something new from it. -------------------------------------------

May 14th, 2007, 05:18 AM	#2
Richard Leadbetter Major Player Join Date: Dec 2005 Posts: 323	The stress on the decoder will obviously be reduced, but what spec is your PC? Just about any modern dual core system should be able to handle the specs of your footage with much aplomb.

May 14th, 2007, 08:20 AM	#4
Morten Gjerstad Regular Crew Join Date: Nov 2005 Posts: 29	I have a dualcore system with 2 gigs of ram, but I've experienced skipping in both video and audio while playing back the timeline when I have many elements in the project file and on the timeline. On smaller projects things work without a hitch.