Skip to main content
A
Abdul_Majid
Known Participant
August 22, 2012
Question

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

  • 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.

    4 replies

    D
    D225342979z9o
    Inspiring
    May 31, 2022

    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
      June 22, 2022

      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
      November 2, 2012

      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
      November 3, 2012

      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
      December 28, 2012

      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
      Jeff Bellune
      Legend
      August 25, 2012

      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
      August 25, 2012

      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
      September 3, 2012

      Hi Eric. Thanks for the clarification. I have tried what you suggested but it has not made any difference to the motion jitter in slow motion clips.

      As Dave pointed out above, this problem has been fixed in CS6. I have since conducted my own GPU Accelerated slow motion testing in CS6 and can confirm it is silky smooth with GPU Acceleration.

      However, as a separate issue (for which i may eventually start a new thread), I have noticed the video quality of CS6 slow motion is not as good as CS5,5 - buts thats another story for another day. But if yout interested in knowing more about this now, download the following CS5.5 and CS6 side-by-side comparison video - keep an eye on the red curtains in the background as the camera pans from right to left - you will notice there is a lot of background ripple in the CS6 clip. However, the motion is smooth in both. Both videos were exported using the same settings i.e. CPU software only rendering, MPEG2 with 1440x1080i 25 High Quality preset.

      http://www.sendspace.com/pro/dl/8gzqeb


      After spending over a week running tests for PMV121 on 4 computers, running the MPE in both software and GPU mode, using several different video cards, using footage of several different video formats and exporting to a large variety of formats, there is definitely problem with CS5.5 and CS6 slow motion.  (Yes, Frame Blend was set for the clip on the timeline I was testing).

      However, the severity of it does vary from clip to clip.  I have put up a video on YouTube that will show you what I am taling about.

      Here is the link  http://youtu.be/nI4bhUsQBbA

      The clips I used during the tests where all HD and they were 1920 x 1080 and 1440 x 1080.

      I ran the tests with CS5, CS5.5 and CS6.  CS5 there is no problem.  However, the slow motion problem is different between CS5.5 and CS6.  Watch the video to see what I am talking about.


      Dave

      A
      Abdul_MajidAuthor
      Known Participant
      August 25, 2012

      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
      Jeff Bellune
      Legend
      August 25, 2012

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

      Adobe - Feature Request/Bug Report Form

      Terms & ConditionsAccessibility statement
      Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices