PC 4K video exporting

Airman 4 Feb 2015 15:07
Hello contributors,

i have problem with exporting 4k video on PC. Exported video is not playing smooth at all its like you are wathing 10 fps video.
To know my PC is new (i7 4,4ghz, 16gb ram, Ati radeon x290 4GB.

Requierments are:
Quicktime
MOV.
Photo - JPEG
Quality 90.

Ok so i do all of that, no filters, just export raw video 3840x2160 25 fps. Renderer is Mercury playback engine GPU (open CL)

Does anybody know where are the problem. How you guys deal with exporting on PC engines ?

Thanks for answers.
RekindlePhoto 4 Feb 2015 15:35
Is it jerky when you look at it in the software processor or after when viewing in QuickTime or both? Depending on what software processor you are using, it is still very likely that it will be jerky in the playback window. Once rendered it should look just fine. I have a similar PC and once rendered and saved it looks fine. Why are you processing at 25 fps?
Airman 4 Feb 2015 22:18
i recorded with GH4 4k 25fps,
It is jerky when i export video allready, when its in premiere pro rendered it is ok (preview) but when i export video its over with smothnes. I play video in quicktime, VLC, BS player and even in itunes, and all the same...i dont understand.
Mizamook 5 Feb 2015 02:31
I can watch my XAVC-S files perfectly in players, and usually smoothly in Sony Vegas, but after I render to PJPEG I cannot view them smoothly. I cannot view ProRes either. It's annoying, but if I need to double check smoothness I render an HD version out to check. I've always heard "compressed files from camera are too hard on computer's processor so you have to transcode to play smoothly" etc, but reality seems backwards based on that. Not sure I understand it either. I thought it might be data bottleneck off the drive (separate internal SATA3) but I don't know how to tell.
ODesigns 5 Feb 2015 03:00
P-JPEG and ProRes are very "chunky" codecs, especially at 4K. I wouldn't be too concerned about stuttering playback. Upload the clip to P5 and wait for the preview to render. If it plays fine there, then you're fine.

You could always try to playback your 4K clips at half-resolution (CTRL-0 if using the QT player) to see if it plays back better.
danielschweinert 5 Feb 2015 09:43
Maybe your are playing the file from a slow HDD. Im using a 960GB SSD and 4k files play perfectly smooth in quicktime, premiere and davinci resolve.
RekindlePhoto 5 Feb 2015 14:44
Indeed, external hard drives (most makes and models) are really only for final storage. All processing and playback should be on at least a faster internal hard drive or SSD.
Charlinex 5 Feb 2015 19:03
I don't think your system is the problem. I used a much older and slower PC than yours, no problem with 4k nor Prores 4:4:4
Airman 5 Feb 2015 22:03
Thanky for your answers guys! i apreciate it.
So i think about disk, yes i had it on external USB 3.0, then i copy one clip on SSD and open new project, drag clip and cut it to 30 sec, export, target on SSD. I did a same thing, not playing smooth, in premiere playback is fine...something happens when its exporting and i dont know what.

But i will upload it on pond and see when it reders. like ODesigns said. but i played in QT at half res and still same :/
digitalemotion 9 Feb 2015 07:48
In my experience, 4k ProRes files play back much smoother than 4k Photo-JPG files. Perhaps the decompression is more intensive for Photo-JPG.
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