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lvthunder
Inspiring
January 31, 2025
Answered

Problem with multicam playback

  • January 31, 2025
  • 1 reply
  • 5117 views

I have 5 angles of footage of a figure skater routine.  They are all 4k.  Two Canon R5, Insta360, GoPro, and iPhone cameras.  I have made proxies for all the footage.  I have them in a multicam and I'm trying to watch it to select the angles to show.  There are parts where the video just stops playing or the fps is like 1 or 2.  I saw a YouTube video that said the audio was causing a problem so I clicked solo on one of the audio tracks, but that didn't help.  I'm on Windows and in Task Manager Memory is like 36% and CPU, Disk, and GPI are all under 6%.  Any ideas on what I can do would be appreciated.  The video is only 4 minutes long.

 

My Computer Specs

i9-13900K

64GB RAM

Nvidia Quadro A4000 video card

Samsung T7 connected to a Thunderbolt port for the video

    Correct answer PaulMurphy

    I found out the clip that is giving me issues.  It is the clip that was shot with an iPhone.  I can play the two Canon R5, the GoPro, and the Insta 360 cameras and it works good.  Once I add in the iPhone angle is when it acts up.  The media properties of that file are below.  Any suggestions on what I should do?

     

    Offline: User Requested
    Media Path History:
    M:\Figure Skating\Jerome iPhone\IMG_8742.M4V
    /Volumes/T7//Figure Skating/Jerome iPhone/IMG_8742.m4v

    Proxy Media

    File Path: W:\Figure Skating\Jerome iPhone\Proxies\Night 1_Proxy.mov
    Type: QuickTime Movie
    File Size: 5.36 GB
    Image Size: 1280 x 720
    Frame Rate: 59.94
    Source Audio Format: 44100 Hz - 16-bit - Stereo
    Project Audio Format: 44100 Hz - 32 bit floating point - Stereo
    Total Duration: 00:16:12:40
    Pixel Aspect Ratio: 1.0
    Alpha: None
    Color Space: Rec. 709
    Color Space Override: Off
    Input LUT: None

    QuickTime Details:
    Movie contains 1 video track(s), 1 audio track(s), 0 closed caption track(s), and 1 timecode track(s).

    Video:
    There are 58360 frames with a duration of 1001/60000ths.

    Video track 1:
    Duration is 0:16:13:38
    Average frame rate is 59.95 fps

    Video track 1 contains 1 type(s) of video data:

    Video data block #1:
    Frame Size = 1280 x 720
    Compressor = Apple ProRes 422 Proxy
    Quality = Most (5.00)

    Audio:
    Audio track 1 contains 1 type(s) of audio data:

    Audio data block #1:
    Format = 16 bit - Stereo
    Rate = 44100 Hz
    Compressor = sowt

    Timecode:
    Timecode track 1 contains 1 type(s) of data:

    Timecode data block #1:
    Start Time = 00:00:00:00
    Reel name =

     


    It looks like your original media has a variable frame rate (VFR), while your proxy is using a constant frame rate (CFR). This mismatch can cause playback and sync issues in multicam editing. To avoid these problems, I recommend converting your original media to CFR before creating proxies.

    For more details on working with VFR media in Premiere Pro, check out this guide:

    How to Work with Variable Frame Rate (VFR) Media in Premiere Pro

    1 reply

    P
    Community Expert
    PaulMurphyCommunity Expert
    Community Expert
    February 1, 2025

    What are the specs of your proxies? Specifically, their resolution and codec?

    For optimal performance, you should use a mezzanine codec such as ProRes, Cineform, or DNxHR. If you're using ProRes, try adjusting the playback quality by clicking the Settings button (wrench icon) in the Program Monitor and selecting Auto-Adjust Multi-Camera Playback Quality.

     

    Avoid using H.264 for proxies, as it is will create a playback bottleneck with multi-camera.

    Additionally, if your iPhone footage is recorded in Variable Frame Rate (VFR), it may cause playback issues. Converting it to Constant Frame Rate (CFR) before editing can help ensure smoother performance.

      L
      lvthunderAuthor
      Inspiring
      February 1, 2025

      I used the ProRes half-size preset when making the proxies.  So I guess they are around 1080p.  I'll check for sure when I get home.

      P
      Community Expert
      PaulMurphyCommunity Expert
      Community Expert
      February 8, 2025

      I did that and yes it plays smoothly.  The problem is they are very tiny.


      This suggests that Premiere should be able to play those proxies without any issues.

      I would recommend going back to your original project and doing 2 things:
      1) Check the file path of your proxies in the Project panel - have you accidentally linked to the high-res media instead of the proxies? I notice in your second last screenshot that you have proxies enabled but some of the footage is not displaying a watermark.
      2) Make your high-res media offline, so that only the proxies are attached.

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