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    Stuttering Video Playback and Skipping Frames

    Troubleshooting and Bug Reports
    isadora 3 codec playback issues
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    • J Grima
      J Grima last edited by Woland

      Dear community

      I am running a very simple show where I play just 2 videos. They are encoded in mp4 and I do understand that this is not the ideal codec however my CPU load stays all the time below 2% so in that sense I have no load at all and it is just one video at a time. However the playing of the video is never smooth. It jumps and it stutters a lot of time. 

      Is there anyone of you experiencing the same problem and is there a way around this? I found some posts from 6 years ago but nothing recent in the forum.

      I would appreciate your responses. 

      jim

      Artist and theatre maker. Active in Amsterdam and Malta
      MacBook Pro 15-inch, 2019, 2,3 GHz 8-Core Intel Core i9, Radeon Pro 560X 4 GB

      mark_m Michel 2 Replies Last reply Reply Quote 0
      • mark_m
        mark_m @J Grima last edited by

        @jimmy-grima

        If you play back the videos outside of Isadora, using, for example, the OS's media player, do the videos stutter then?
        I ask as I'm wondering it it's an Isadora issue, or a media issue.
        Do you know how the MP4s were encoded? VBR or CBR? What the bitrate is? And what kind of drive are you playing them back from? Is it the same drive as the OS or do you have a separate media drive?

        Intel NUC8i7HVK Hades Canyon VR Gaming NUC, i7-8809G w/ Radeon RX Vega M GH 4GB Graphics, 32GB RAM, 2 x NVMe SSD
        Gigabyte Aero 15 OLED XD. Intel Core i7-11800H, NVidia RTX3070, 32GB RAM 2 x NVMe SSD
        PC Specialist Desktop: i9-14900K, RTX4070Ti, 64GB RAM, Win11Pro
        www.natalieinsideout.com

        1 Reply Last reply Reply Quote 1
        • J Grima
          J Grima last edited by

          @mark_m 

          On a normal VLC or QuickTime or even Preview they do not stutter. 

           I do not have the encoding information. Do you have tips ?

           I have an SSD drive and it is the internal hard disk. I have 150GB of space available out of 256. 

          thanks a lot

          Artist and theatre maker. Active in Amsterdam and Malta
          MacBook Pro 15-inch, 2019, 2,3 GHz 8-Core Intel Core i9, Radeon Pro 560X 4 GB

          mark_m 1 Reply Last reply Reply Quote 0
          • mark_m
            mark_m @J Grima last edited by

            @jimmy-grima
             
            I can't offer a solution but can make a suggestion: have a read of some of the help articles about performance optimisation:

            https://support.troikatronix.c...

            Cheers

            Mark

            Intel NUC8i7HVK Hades Canyon VR Gaming NUC, i7-8809G w/ Radeon RX Vega M GH 4GB Graphics, 32GB RAM, 2 x NVMe SSD
            Gigabyte Aero 15 OLED XD. Intel Core i7-11800H, NVidia RTX3070, 32GB RAM 2 x NVMe SSD
            PC Specialist Desktop: i9-14900K, RTX4070Ti, 64GB RAM, Win11Pro
            www.natalieinsideout.com

            1 Reply Last reply Reply Quote 0
            • Michel
              Michel Izzy Guru @J Grima last edited by Michel

              @jimmy-grima

              Are you using Isadora 2 or 3? Have you set the external display to the same refresh rate as the frame rate of the movie? Mac or Windows?

              Best Michel

              Michel Weber | www.filmprojekt.ch | rMBP (2019) i9, 16gig, AMD 5500M 8 GB, OS X 10.15 | located in Winterthur Switzerland.

              1 Reply Last reply Reply Quote 1
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