Known Participant

Question

Premier Pro Slow Motion is jerky (not smooth) when exporting with Mercury Playback GPU Acceleration

Forum|Forum|13 years ago
August 22, 2012
4 replies
43878 views

When rendering slow motion video clips (video slowed down to, for example, 30%), with Mercury Playback GPU Acceleration and with frame blend enabled, the rendered video is not smooth (is jerky). Frame Blending does not have any effect on the rendered output , The results are identicle with and without Frame Blend.

When software only rendering, and with frame blend enabled (ticked), the resulting video is smooth motion.

Please take a look at the following which demonstrates the issue:

https://vimeo.com/48133743

I am using the following:

Windos 7 64 bit

Premier Pro CS5.5 (with latest updates)

NVIDIA GeForce GTX 570 (with latest driver)

The video I am rendering is HDV 1080i format..

I have tried exporting in MPEG2 and M2T with Max Render Quality ticked. Both formats produce the same results.

Why does Frame Blending have no effect on slowed down clips when exporting with Mercury Playback GPU Acceleration? Is this a known issue?

This topic has been closed for replies.

D

D225342979z9o

Inspiring

Hi I am having the same issue as you. It started last week all of a sudden. Using Sony A7S3 10 bit, 60 frames a second slowed to half, I am having bad motion blur even with very slow movements on my part while taking video. I don't know what to do about it. I am trying to search for a solution. I dropped back to version 22 2.0 and I thought that fixed it, but no.

J

Jaron Wong

Participant

God. I'm running into this for months! It's unbelievable that they haven't fixed this since 2014.

Looking for solutions but nothing can help.

S

seelenfaenger

Participant

Thought I chime in here for some more information. I'm not a video pro (rarely do anything related) but from what I understand slowing down a clip and enabling Frame Blend should produce a smooth result. However, when I do exactly that with the current CS6 I get the same choppy result that has been the subject of this thread.

So as long as I am not overseeing something in the process of creating slow motion, the problem still exists with CS6.

To test it I used a h264 video @ 1080p60 I exported with Sony Vegas at 100% speed and normal settings (as far as I can tell) earlier. I imported it into a new project, slowed it down and enabled frame blend (for the clip as well as later in export). However, the frames in the resulting video are not interpolated but duplicated, so all I see is a slide show with 12 FPS.

Renderer is MPE, software only (apparently my 660 Ti is not even supported...).

D

Dave_Knarr

Participating Frequently

First, I have a video showing the slow motion problem in CS5.5 and CS6. CS5 seems to be okay. Here it the link to the video http://www.studio1productions.com/blog/?p=93

Also, you can enable you 660Ti to run in GPU mode. Here is an article explain how and a software program I wrote that will do it for you for CS5, CS5.5 and CS6

http://www.studio1productions.com/Articles/PremiereCS5.htm

Dave

A

Abdul_MajidAuthor

Known Participant

Hi

I raised this issue with Adobe back in August 2012 - see above. Adobe have withdrwan the support case I raised with the following comments:

"The case has been withdrawn as it is a known bug & has been reported to our Engineering Team for further research."

So, at least it has been acknowledged as a bug. Hopefully a fix on its way in the not too distant future.

Jeff Bellune

Legend

I don't know what combination of hardware or settings is affecting your result, but I just exported AVCHD 1080i source footage that was slowed down to 15% using hardware MPE in CS5.5 and the result was silky-smooth slow motion. I exported to MPEG2 Blu-ray using Premiere Pro's built-in encoder. I have a GTX560Ti card using the latest drivers.

Jeff

E

excited_Genie16B8

Legend

In my test with 24p media, both hardware and software looked like crap at 30%, very stuttery, even with Frame Blend.

D

Dave_Knarr

Participating Frequently

Just to confuse matters further, a friend has reported that frame blending with slow motion does not work for him at all - neither in GPU mode nor in CPU mode.There are also a number of postings on this site (including Simon, above) who claim this - but no one has taken this matter seriously because someone always comes along and proves it works for them.

So I sent my friend my source video clip that I have been using for my tests and asked him the export in CPU mode with frame blending enabled and with speed set to 15%. He is also using CS5.5. The difference between my video and his (both produced in CPU mode with frame blending enabled) is clearly visible in the comparison video which can be downloaded from the following site.

http://www.sendspace.com/pro/dl/yitvrl

This may go some way to explain the inconsistant results Dave is getting between home and office. It may not actually be the graphics card at fault, especially if the same graphics card model works on one machine but not another(???)

One thought has crossed my mind with regards to the GPU problem I am having. I installed CS5.5 first and then I installed my GTX570. I wonder if it would make any difference if I installed the GTX570 first and then premier pro 5.5 on top of that. I doubt it but I'm getting desparate for answers and am willing to suggest anything that comes to mind!!! .

Hi PMV121

The problem I believe is in CS5.5. When I got smooth results at home in CS5.5 I believe that had to do with the clip I was using. Today, I downloaded your clip at home and got the same results as you. When I tried your clip on 3 different machines in the office, I still got the same result as you.

When I tried it on a computer running CS6, I got great results as you can see in this link:

http://www.studio1productions.com/test.htm On this page, I have the clip you sent me exporting with Software and GPU mode, with the slow motion set for 15%. One link on the page is for CS5.5 and the other link is for CS6.

There does not seem to be any problem with CS6, only with CS5.5.

I have 3 systems running CS5.5 and the all produced the same results with your clip. My CS6 system, when testing in Software mode or GPU mode gave me results that looks almost identical.

The clip I used at home was of the kids playing basketball and I got almost identical results in CS5.5 on my home system and 3 of the systems in the office running CS5.5.

However, I worked with an additional 4 different clips and noticed that I was getting various degrees of jerkiness on CS5.5 when using the GPU mode. This is probably why some people may not be noticing the jerkiness in CS5.5, it seems to depend on the clip.

All 4 clips did fine in software mode. When I tried these 4 clips on CS6, they all looked great in the GPU mode.

Best thing to do is upgrade to CS6.

Also, I ran the tests today with several different videos cards, the GTX680, GTX570, the GT545 and a GT240. The results were same with each video card so it is not the video card or the video card driver as I was using the latest NVidia drive of 301.42.

Dave Knarr

Studio 1 Productions

A

Abdul_MajidAuthor

Known Participant

This is the first time I have used this forum. I am surprised no one has replied after several days of me posting this question. Perhaps I have not described the problem clearly. If anyone has any questions or requires clarification, please do not hesitate to ask.

I have since been liaising with Studio 1 Productions who have also confirmed this problem in CS5.5 - please visit the following link for more information:

http://www.facebook.com/permalink.php?story_fbid=455951077751730&id=149452058431969

We are conducting further experiments to see if this problem also exists in CS6.

Can anyone suggest how we can get this escalated to the right people?

Jeff Bellune

Legend

Can anyone suggest how we can get this escalated to the right people?

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