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fanaeian
Known Participant
July 22, 2021
Answered

jumpy footage after applying "optical flow"

  • July 22, 2021
  • 8 replies
  • 14946 views

i have just purchased Mac Mini with m1 chip and i am doing my first project, once i apply slow motion with optical flow to get a smooth motion the result is a jumpy footage i hve tried different footage form different cameras but all give me the same result has anyone encountered similar problem plesae help.

    This topic has been closed for replies.
    Correct answer Cute James

    Hi Sumeet

    thanks for that but i do not have that option in the get info box of the premiere pro i've already checked, i have attched a screen shot of it.


    That's the info for the Premiere folder, not the Premiere app.

     

    You need to open that folder, which will reveal the Premiere app itself.

    Select that, do a Get Info, and you'll the option to Open using Rosetta, as per Sumeet's advice above.

     

    You can also refer to my suggestion towards the bottom of this thread for a workaround that allows Premiere to run using the optimised Apple Silicon version, while exporting using the Intel version of MediaEncoder (via Rosetta).

    8 replies

    Luis Azcona
    Luis Azcona
    Inspiring
    March 15, 2022

    i am experiencing this now. Glitches in clips with optical flow. this was easily solvable in windows by nesting. Not now that i have an m1. Macbook Pro, footage from GoPro Hero 10

    F
    fanaeianAuthor
    Known Participant
    December 25, 2021

    Just upgraded mac os Big Sur to mac os Monterey and it fixed the issue 🙂

     

      Cute James
      Cute James
      Inspiring
      December 27, 2021

      Wow, really?

       

      I'm still on Big Sur (11.6) here, but intend to do a clean install of Monterey in the near future.

      I'll definitely look forward to giving this a try!

       

      Thanks!

      F
      fanaeianAuthor
      Known Participant
      December 31, 2021

      my apologies after using more of the slow mo with optical flow i observed some jumpy issues as before and it seems still have to use the rosetta enabled option on the Adobe premirere and Adobe encoder.

      T
      TheRemnant
      Participating Frequently
      December 7, 2021

      I'm seeing the same issue on my M1 Macbook Pro. The workaround provided by Cute James does work, but anyone confirm that Adobe is working on the issue?

      E
      ericp23442574
      Participant
      November 17, 2021

      Rosetta fixed for me, but hopeing there was a better solution

       

      chrisw44157881
      chrisw44157881
      Inspiring
      August 7, 2021

      have you tried pre-rendering to Prores before applying effect? perhaps the interframe is not being 100% decoded. (or disabled hardware decoding)?

      F
      fanaeianAuthor
      Known Participant
      August 7, 2021

      hardware decoding was enabled but how can i apply Pre-rendering before applying effect as the footage get the red line on top only after applying Optical flow.

      S
      Community Manager
      Sumeet Kumar ChoubeyCommunity Manager
      Community Manager
      August 12, 2021

      Hi fanaeian ,

       

      Thanks for the video. Could you please try running the app in Rosetta mode and check if the clip with optical flow is exporting properly?

       

      Thanks,

      Sumeet

      S
      Community Manager
      Sumeet Kumar ChoubeyCommunity Manager
      Community Manager
      August 2, 2021

      Hi fanaeian,

       

      We're sorry about the poor experience. We're investigating a similar issue. Could you please confirm the source of these media files? Was it captured on Sony A7S III or Sony FX3?

       

      Thanks,

      Sumeet

      F
      fanaeianAuthor
      Known Participant
      August 2, 2021

      thanks for your reply i only use Canon cameras Eos R6 and 6D II the footage from both camera experiance the same problem when i apply "Optical flow'" .

      S
      Community Manager
      Sumeet Kumar ChoubeyCommunity Manager
      Community Manager
      August 6, 2021

      Thanks for the details. The results would be dependent on the type of motion in the shot & the frame rate of the clip which you are trying to slow down. Let us know the frame rate of the clip & the percentage to which you are slowing down the footage. Also, if possible please show a video of the jumpy footage that you are getting after render/export.

       

      Thanks,

      Sumeet

      Cute James
      Cute James
      Inspiring
      August 2, 2021

      Hello folks,

       

      I use Optical Flow on a handful of slowed-down clips in a sequence, however when exporting, I noticed random glitches in those portions of the final MP4 file.

       

      As a workaround, I tried changing those slowed-down clips to separate, individual sequences, with a view to exporting them to a proxy video and then swapping them back into the master sequence timeline as "pre-rendered" video.

       

      However, I noticed that even when exporting the individual clips, the glitches would still sometimes occur, however it was random.  I can export the same 2 second clip with 50% speed reduction 4~5 times, and only one of those exports will result in a MP4 file that plays back smoothly - the rest have glitches.

       

      I cannot recall exactly when I noticed this issue, however it may have been after updating to 15.4 (the Apple Silicon native version).

       

      Currently, I am re-trying 15.4 using Rosetta to see if this helps the situation.

       

      Does anyone else experience similar issues with 15.4 on M1 Macs?

       

      Thank you in advance!

      Cute James
      Cute James
      Inspiring
      August 2, 2021

      Here are some example exported clips.

      The first two contain glitches, the last clip is correct.

       

      Again, these clips are all exported from the same sequence with exactly the same settings.

      Sometimes the export will result in a smooth clip, sometimes it will have one or more glitches.

       

      It's very frustrating when trying to export a 40 minute timeline to find there is a glitch in one of the clips at the very end of the video.

      Cute James
      Cute James
      Inspiring
      August 2, 2021

      Running Premiere 15.4 using Rosetta, I exported the full 40 minutes timeline.

      Checking the MP4 file in VLC, it does not appear to have any glitches in the slowed-down sections, therefore I can only assume that this is a bug in the Apple Silicon version of Premiere.

       

      Hopefully if can be fixed.

       

      Thanks in advance!

      Joëlle Bh
      Community Expert
      Joëlle BhCommunity Expert
      Community Expert
      July 22, 2021

      Hello,

      Are you rendering the timeline?

      https://blog.adobe.com/en/publish/2015/12/02/optical-flow-time-remapping-tips-tricks-for-best-results.html

      F
      fanaeianAuthor
      Known Participant
      July 22, 2021

      Hi there

      thanks for you help. yes i do render my foootage it actually looks ok before rendering but once it is rendered it gets jumpy. i have used opremiere for almost 20 years now this is the fist time i see this and it s happening in my Mac mini with M1 chip and its fine in my pc or my imac with intel chip.

       

        Joëlle Bh
        Community Expert
        Joëlle BhCommunity Expert
        Community Expert
        July 22, 2021

        can you try to export this clip? i just need to know if it looks okay after the export

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