Cannot work with 4:2:2 10 bit clips in Premiere Pro

[Rupert76]

Hy everyone,

I am new in this forum, I do lot of photography but new to video editing. My problem is this one: I cannot work in Premiere Pro (2017.0.1 version) with files from sony a7IV recorded in XAVC S HD at, say, 50M 4:2:2 10 bit. If I switch in camera to 50M 4:2:0 8 bit I have NO problem at all. The archives that the camera gives me are MPEG4.
I can import, but as soon as I drag to the timeline the two visualization windows at the top of the 4 squares grid in the workspace get stucked. The audio goes smooth, but the video block. It's not a black image. I can see whatever frame it stuck to. And then maybe after some time I can see another frame. Looks like my PC specs are not enough. I can play with no problem at all the same clip in windows media player or VLC. I understand, i guess, that the problem is the bitrate and not the size, because I can import and work with videos taken with my D750, that are, say, 500 MB dimensions (the 10 bit MPEG that give me problems are less than 200 MB) with no problems at all. I don't remember at the moment if th D750 file was a MOV archive or a MPEG4.

Could you give me ideas on what I can do to be able to work on my 10 bit files in Premiere?
I guess if Davinci would be a solution, or maybe converting with FFmpegs (but I saw it looks quite difficult, I cannot understand the conversion table). There is some other transcoding method? It would make sense to create proxis? Updating PC is not an option now, I just upscaled to a Asus tuf gaming OC 6G Geforce GTX 1600 Ti and from 16 to 32 Ram. I have an Intel i5-6400 CPU @ 2.70GHz 2.71 GHz.

Thanks everyone!!
Roberto.

[poisondeathray]

This is a bug. Just having slower hardware doesn't manifest like your description, and the fact that it plays ok in VLC adds weight that it's a bug

Easiest option is probably upgrade - certain point releases have bugs, you could just update to some newer CC 2017 release like 11.1 or some much newer CC version like 2023

Alternatively some high quality 10bit422 intermediate format like ProresHQ or DNxHR would work . There are many GUI's for ffmpeg if the commandline looks complicated (I don't really use the GUI's so I'm not up to date on which is easy to use). But then you waste time and HDD space encoding to intermediates.

Internal proxy method wouldn't work, unless they were decoded correctly in the first place (you can't create the proxies or swap back to originals using PP - you'd have the same issue and it would hang) . External generation proxies would work, but more complicated.

[Rupert76]

Thanks man, understood!