FCPX 10.2.. Playback Glitches and Studder

Has anyone else experienced a playback studded in FCPX 10.2 and on? I had this problem begin and has carried over into El Capitan even after a clean install of everything. Playback in any other software(QuickTime, Premiere, Resolve...) is all fine. But in FCPX it gives this persistent studder and occasional artifacts in the image...

Im running a CustoMac. I'm thinking it may be a problem with my Nvidia Cards. GTX 970 SLI. But it's such a strange issue to be only attached to FCPX. Nowhere else are there performance problems, as a matter of fact, my benchmarks are outstanding.

I saw something that looked like a similar issue in another forum involving Adobe Premiere and the new OS. Apple said they were aware of the problem, and I'm wondering if it's related.

If anyone else has experienced this strange glitch, please let me know, I've been unable to edit on my main machine for over 2 months now.

Thanks
Rob

robert.adamson wrote: Has anyone else experienced a playback studded in FCPX 10.2 and on? I had this problem begin and has carried over into El Capitan even after a clean install of everything. Playback in any other software(QuickTime, Premiere, Resolve...) is all fine. But in FCPX it gives this persistent studder and occasional artifacts in the image... Im running a CustoMac. I'm thinking it may be a problem with my Nvidia Cards. GTX 970 SLI....I saw something that looked like a similar issue in another forum involving Adobe Premiere and the new OS. Apple said they were aware of the problem, and I'm wondering if it's related...

I am currently doing a lot of performance testing on FCP X 10.2.2 and Premiere Pro CC 2015.0.2 on top-spec 2015 and 2013 iMac 27s (both on El Cap 10.11.1), also a 4Ghz Windows 10 machine (Premiere only). Playing back H264 1080p, I don't see any major playback stutter. However in general FCP X is much more responsive than Premiere. Using H264 4k, there is definite playback stutter on FCP X but it's expected and typically 1/2 sec or less. On Premiere it's much worse -- often 5 second viewer lag -- on both Windows and OS X. I'll post more on this later. Using proxy mode in FCP X makes 4k fast and fluid, even for multicam.

Are you playing back with viewer set to "Better Quality" or "Better Performance"? Try "Performance" if you have not. What codec and resolution are you using? Can you try transcoding to proxy, changing the viewer mode and see if it still stutters? That may help isolate the problem.

Rob
Are you using the latest nVidia drivers available directly from nVidia?

Greg

Hey guys,

Thank you for the response. Here is a list of what I have tried.

*Resetting Preferences
*Uninstalling and reinstalling nvidia drivers
*Changed playback from best quality to best performance(sli 970's.. I don't have this issue on any other software..)
*Reinstalling FCPX
*Fresh clean install of OSX.

P.s.. Is it possible to upload a video description? I could upload a YouTube link...

Here are attached clips, one playback is in FCPX, the other in Quicktime. Has anybody else seen this kind of FCPX playback studdering?

*Resetting Preferences
*Uninstalling and reinstalling nvidia drivers

LOL!!!!

Trash you GTX970!!!! And buy ATI R9 ...

PS Nvidia lobbying ALL Hackintosh resources of the world.
I am change absolutely new GTX970 to R9 280Х today due FCPX bugs & crashes.

Now i am happy
BryceX test

CTX660Ti - 98 s
GTX970 - 58 s
280X - 35 s

Just wanted to give an update, I pulled my GTX 970 SLI out and tried an r9 390. I couldn't make it work in El Capitan, too little support for AMD cards at the moment. Almost gave up, but decided to just double down and bought Nvidia GTX 980TI. Plugged it in, and the problem was solved.

Also ran the BRuceX Test.. 26sec..

robert.adamson wrote: Here are attached clips, one playback is in FCPX, the other in Quicktime. Has anybody else seen this kind of FCPX playback studdering?

You are showing playback in the Import window... that will be limited by the card you are importing from. If it stutters after import that is another matter.

as an addendum, Luis, to your excellent observation

lichinho wrote: ... that will be limited by the card you are importing from....

… and the connection btw card and computer, e.g. usb2 is in most cases too slow, or too-much traffic on the same usb-'rail' ....

I've had the same issue with having 2 GTX 980s in my Hackintosh, with both of them in, it would stutter. I took one out and it was fine. Sad, as I wanted FCPX to utilize both, but in my experience, it loves dual AMDs more than anything, it didn't like my dual GTX 980s.