EOS R5 II - Stutter Problem with Pre-Continuous Shooting

[wizard8080]

Hi, anyone having problems with the R5 ii stuttering with pre-continuous shooting on with H+ frame rate?  When I use it for action shots, half the time or more, it will take a burst of frames, then pause for a split second, and start again.  Often pauses more than once during a burst.  When I turn pre-continuous shooting off, it doesn't pause or stutter.  I'm had this problem since it was released and consistent on two different units.  I'm shocked to not be able to find anyone else post about this.  Other settings: cRAW, no JPEG.  Using ProGrade CFExpress 4.0 cards.

Not sure why it does it sometimes, but not others.  I can't get it to do it on purpose.  It always seems to do it when I'm shooting sports.  When I try to get it to do it on purpose to test, I haven't been able to get it to stutter.  But when I'm actually shooting sports, it does it like 80% of the time.  Really weird.

[andrewortman]

Yes, definitely something I've been trying to debug for a while. But I think I have a workaround. Can you try shooting without cRAW? ie, just RAW. Yes, it reduces the overall buffer size down, but buffer doesnt really matter if it just goes to 0 at random and causes this stuttering. 

I tried though last night with just RAW (not cRAW) on a fast card, and while I get less time (1-2 seconds vs 5 seconds or so) - it resolved the stuttering for the remainder of the 30 minute session. If this works for you too, let me know. It might be a clue for Canon engineers to diagnose the issue in the firmware.

[clicky]

I noticed the same issue yesterday shooting baseball and thought it was the recent v1.03 firmware.  Low light so high iso, craw, H+, action priority off, blackout free off, EF 100-400 and it stuttered constantly when enabled. Turned it off and back to normal. Prograde 1tb CFExpress 4 card.