It only seems to happen with cineform avi files either going to or from. Running 14.3 which is slightly better. Drivers are Nvidia's latest enterprise drivers for quadro 390.77. Performance on or off doesn't seem to make any difference.
Cineform rendering to cineform avi YUV 10bit - renders at about 30-40% with everything at max and with glitches as below! In 12.5 this runs at 90 - 100% with no glitches.
Cineform rendering to DNxHD 220X - renders at about 85-90% plus with everything at max! In 12.5 nearer 100% with no glitches.
Originally the files from the camera are DNxHD 220X then because I use a stereoscopic workflow using Cineform 3D muxed files they are transcoded to Cineform FS1 10bit. Because there is a bug you already know about combining Cineform avi files I'm fixing the editing and the stereoscopic bits in Premiere and Cineform STUDIO PRO and the splitting back down into left and right cineform to colour in resolve. I'm rendering from and to using SSD disks with pretty much nothing else on them. These stills are taken from a time line with quite a few corrections but it is only HD so shouldn't really be that taxing. I did notice in the Cineform rendering to DNxHD 220X that a few frames were media offline as well again not a problem in 12.5 with the same setup exactly.
Appreciate you taking the time to look at this.
Thanks
Richard