Skip to main content
serrini
serrini
Known Participant
March 13, 2020
Question

Modified clips not playing back in slow motion because of proxies (SOLVED)

  • March 13, 2020
  • 7 replies
  • 6303 views

I had some clips that were recorded at 120 FPS that I brought into Premiere. Usually I right click them, choose Modify>interpret footage and then set the frame rate to 23.976. When I did this, the audio slowed down, but the video remained at 120 FPS (and played back in "Real time"). The clip got longer on the timeline, but where the last frame of the clip was in real time it would just be a freeze frame until the end of the clip on the timeline.

 

SOLUTION: what I figured out was that I had made proxies of the clips at 120 FPS. For whatever reason (a bug) if you have proxies on and you modify a clip, it does not modify the proxy (the video at least ... it does modify the audio which is even more confusing). If you turn proxies off you will see the clip is in fact modified and plays in slow motion (at 23.976 FPS).

 

Just wanted to drop this here as it confounded me for most of the day;) 

This topic has been closed for replies.

7 replies

S
Splicer Jack
Participant
May 3, 2024

You're a God, thank you.

ramseym35049056
ramseym35049056
Participant
December 28, 2022

THANK YOU!   WOW, you just saved me so much work.  I really appreciate this.  I ran into the exact same problem just now.  You helped save me!  🙂

RAD Films
RAD Films
Inspiring
April 15, 2022

This is a big pain in the bum. Especially when it comes to 4 channel audio out of my three Canon XF605s. For one, you can't create a proxy with 4 channel audio in a decent format to run under Windows (MP4), and second, my cameras generate the proxies while recording. That saves me time in post to render them and it is redundant footage. It doesn't make sense for me to render new proxies.
There should be a better resolution to this problem in the future.

M
Michael Grenadier
Legend
April 15, 2022

Here's a workaround.  First, as Kevin suggested, do not interpret the clips to adjust speed but use the adjust speed dialog.   And here's the trick, rather than "attaching" the camera generated proxies, unlink the full quality camera original and relink to the camera generated proxies in Premiere.  When you lock picture, unlink the proxies and relink to the full quality camera original...  I spent several days tearing my hear out trying to generating proxies from a sony camera (maybe the FS7 - can't remember but can dig down to figure it out if you want) that had 8 tracks of audio generated in camera...  Of the 8 channels of audio, I only needed the first 2 channels (actuallly there was no audio in tracks 3 - 8_). ...Although I could generate proxies within premiere, they wouldn't stay attached to the camera original clips...  This solution worked just fine...  But I'd do a test to make sure this workaround wil function correctly with your camera generated proxies.    If you need help figuring out how to test this workflow, post back. and if I'm not being clear enough, just ask me to describe this workflow in more detail.

    RAD Films
    RAD Films
    Inspiring
    April 15, 2022

    Thanks for the workaround. It is clear and easy to follow. 
    I have been attaching the camera-generated multichannel proxies and using Speed manipulation on the timeline. The real problem occurs when assembling the peace B-roll and calling the shots as you don't have that slow-motion preview in the Source monitor. It is hard to judge where the In and Outs should be. After upgrading the PC it is more bearable to scrub without the proxies and still use them for Multicam parts, but as soon I add the Input LUTs, things start to crumble. Premiere is crashing more often too.
    There is a thing to be improved there. At the end of the day, the goal is to create stable and easy to use software that takes your focus from dealing with problems to creativity. 

    R Neil Haugen
    R Neil Haugen
    Legend
    March 20, 2020

    Serrini,

     

    Yea, you would think that by now we'd be able to link with options as to say how to handle audio mis-matches. There are a lot of requests in for that ... so I hope it's taken care of sometime realistically soon.

     

    Neil

    Everyone's mileage always varies ...
      J
      JOHN MONDO
      Inspiring
      October 16, 2020

      Thanks for the workaround R Neil. I don't get why it doesn't just work - ie. encode the proxies at the original frame rate and interpret them at the same rate as the master clips. Seems like a bug to me. It would be great if Adobe just overhauled the proxy system, especially with 10bit H265 4K coming along. Give users a bit more freedom with audio etc. I have to use different templates for 8 channel audio from a camera like the FX9 and stereo audio from an A73.

        Christian.Z
        Community Expert
        Christian.ZCommunity Expert
        Community Expert
        March 13, 2020

        This was the first issue I encountered when PP first launched Proxies. And within 5 minutes I lost the tiny bit of respect that I had for "Interpret Footage". It is a useful tool and better just to have it there in case you need it, (i.e you did a mistake with your camera seetings and looking for a quick fix) but my go to approach is to simply modify speed/duration on the timeline. This gives me more flexibility and much more control over things (somehow my head got used to calculating the percentage I need to slow down, rather than to speed up)

          M
          Michael Grenadier
          Legend
          March 13, 2020

          thanks for posting this.  Hopefully it'll help someone with the same probelm

          R Neil Haugen
          R Neil Haugen
          Legend
          March 13, 2020

          Premiere's proxy routine is a bit odd in places. Such as the limitations is has on interpreted time media, like yours. Technically, it's not a bug, it's the way it was designed. I've had several long discussions with engineers at NAB over this. They've got internal reasons of course ... but as a user, those don't ... "fly" too well.

           

          It doesn't do what we expect or want it to do for time-shifted media.

           

          There's been several workarounds 'published' over time. Like this ...

          But it would be nice if they'd just get the proxies to play matching how the original clip is set.

           

          Neil

          Everyone's mileage always varies ...
            serrini
            serriniAuthor
            Known Participant
            March 20, 2020

            Ah ... I see what you are doing there ... thank you ... I mean obviously from a user perspective it seems like an easy fix "just code the program to also modify the proxies when you modify the source" but I know it's never that simple. It's amazing we've come this far, considering I was wrestling "dropped frames" injesting via firewire into Pinnicle Systems editing software 20 years ago.

            Kevin-Monahan
            Community Manager
            Kevin-MonahanCommunity Manager
            Community Manager
            April 15, 2022

            Hi RAD Films,

            Sorry. Do not use the Interpret Footage function for speed effects; instead, speed adjust the clips, and you can create proxies as usual. It sounds like you are struggling with a different problem with your proxies. I don't know of any way to use the camera-generated proxies in a Premiere Pro workflow. I hope the community might offer some advice for you.

             

            Thanks,
            Kevin

            Kevin Monahan - Sr. Community & Engagement Strategist – Pro Video and Audio
              Terms & ConditionsAccessibility statement
              Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices