It's definitely a software issue. I am trying to play a 1080/50p .mxf (Sony FS5 50Mbps) file in the source monitor, and Premiere even can’t manage that, without dropping hundreds of frames in a 30second clip. I understand that Long GOP is not great for editing but surley the source monitor should be able to play the clip. I’m using a 16 core Threadripper, GTX 1080ti 11GB, 64GB RAM, M.2 Boot, M.2 Scratch, SSD Project files, WD Black HDDs. My ONLY workaround it convert the vision to Cineform or ProRes, then play back is smooth. What is going on? I have had this new PC for 5 months and Premiere can not play Long GOP .mxf. Yet, every other piece of software plays the vision smoothly. Mark
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