Slow motion display issue in my sequence

Report · Nov 11, 2019

Hi everyone,

I hope someone would be able to help me on this. I've a strange and frustrating issue to allow my sequence to actually display slow motion while editing. I'll try to be as clear as possible.
My sequence is set to 25 fps, as most of my rushes. Though, I've some of them shot in 50 fps, in order to keep the option to display slow motion or not in my editing. For the sake of clarity, I'll consider only 1 clip shot at 50 fps of 4 seconds. So when I import this 50 fps clip, I first comply it with the 25 fps of my sequence (through right clic/Modify/Measurement ("métrage" in French)/Comply with ). Then when I drag down to my sequence timeline, this clip is twice longer than it was shot, at 8 seconds. But that's here the weird thing is: when i clic "play", the displaying speed is actually normal, not at slow motion, and then at the middle of the clip, at 4 seconds, the clip "freezes" with the last frame until the end of clip. Even more weird, I've tried to export this clip, "converted" from 50 fps to 25 fps with the methodology described above (right clic/Modify/Measurement ("métrage" in French)/Comply with), the exported video is 8 seconds long, and at slow motion, at a frame of 25 fps, as I wanted to.

So my issue here is how I can set my editing sequence and/or PremierePro to display clips at slow motion when it's supposed to? It's absolutly mandatory to allow me to be able to actually edit the clip within it.

I hope my problem is clear enough and someone would be able to save me on this !

Thanks,

William

Report · Nov 11, 2019

i'm having the sasme issue here, figure out it has something to do with GPU acceleration on the project settings... go into:
File > Peroject Settings > General
change video rendering and playback from GPU acceleration to software only...

That fixed it for me.

cheers dan

Report · Nov 12, 2019

Hi Dan,
Thanks very much for your answer, your solution actually worked, but not perfectly fine as when I swiched the video rendering and playback in my project setting from GPU acceleration to software only, the overall performance was poor and as soon as i was changing the frame rate of my clip from 25 to 50 fps (and the other way round), a red line appeared above the clip in the sequence timeline and needed to apply a rendering process, which is quite long...

But I dig in into my issue, run many tests, and figured out the issue is coming from the proxies, whose framerate is automatically kept at initial clip level when created, and not at the same interpreted footage applyied on the clip. You needed to add another step when creating proxies, which is to manually change in Media Encoder the interpreted footage the same way you are doing it in Premiere Pro on your clips.

I found this video on Youtube which described much better than me the process to fix it. I can't thanks enough the video author, Blink University, to have found and shared this solution.

https://www.youtube.com/watch?v=0evKZXohM7o

And it's quite weird ADOBE didn't yet include this option is Premiere Pro, which looks insanely simple, to ask when creating a proxy if we'd like to create the proxy with the same interpreted footage option than the original clip. or not. A simple tick box should be enough...

Anyway, I hope this post will help other filmakers, and thanks again Dan for time.

William