Good PC can't play 4k 120 fps footage smoothly even with proxys...

[JA - Pesca]

Hello,

I have a fairly good PC (Ryzen 7 3700x, 32GB 3200 Mhz RAM, GTX1070, three diferent SSDs for windows, footage and scratch files... 

I usually edit gopro 2k footage with this rig with no problem without the need to use proxys, well recently did a trip with a friend of mine who has a Sony A7s III and he gave me some of his 4k 120 fps footage... wich i know is a lot more data to deal than my usual gopro workload, but i thought that my pc could handle it... welll im struggling here to get workable playback, even using proxys and setting the playback quality to 1/4... Any ideas what's the reason for this?? Is just my PC not good enough?? 

[Andy 1968]

Some of the the new camera codes are hard to playback. You can run the Windows task manager to see the bottle neck. You have an AMD CPU. I dont know if Intel's Quick Sync or the GPU can decode the A7S III files or not. The video might be worth watching.

[mikayla sullivas2544129]

Did you ever find out how to fix it, having same problems with my Dell XPS, NIvia drive, 1TB SSD, i9 core,

SonyFX3 footage

[R Neil Haugen]

Your media is heavy long-GOP stuff. And your machine might not be able to handle both the playback along with all the other things an NLE has to do.

Just some relevant information here ...

Remember, Premiere isn't just playing back one file at a time, like a video player does. Premiere is grabbing bits and pieces of different files, to string them together on the sequence, plus add any changes ... effects ... to that played back image on the fly.

And long-GOP means that only every nine to up to 100 frames is an actual full image frame ... every "frame" in between is just a dataset of the pixels that 1) have changed since the last iframe or 2) will change before the next iframe or 3 ... BOTH.

So the computer, to display maybe 35 frames of one section, may have to decode and decompress up to 100 frames, fully processing them to memory, in order to create the frame you actually see. You may not even see the majority of the frames it had to create in order just to show you the ones of that sequence.

I work for/with/teach pro colorists, mostly based in Resolve or Basellight, and working on machines that make yours and mine look like toy computers. They HATE long-GOP media with a purple passion. And many still when going through the media delivered to them to grade, on finding any  long-GOP, immediately make transcodes to use while grading.

They don't want the hassles and struggles inherent in long-GOP media with heavy effects applied.