I've never had a problem with black frames till yesterday. GPU is always on for effects processing. Current project (1080 60P) consists of pre-rendered XAVC S clips interspersed with stills. I've been using Marco's Send to Handbrake script--then QuickSync within Handbrake. On first render of the 27 min project, I found 3 or 4 glitches, which turned out to be a few black frames. On a second re-render, pretty much the same thing. During playback, I noticed that the black frame "glitches" occurred just before a PSD still, each still consisting of 10 to 15 layers. Back in Photoshop, I saved the PSD's as PNG's, replaced them on the timeline and re-rendered, This time perfect--no black frames. I have no idea whether the multi-layered PSD's were the culprit or just coincidence. Just thought I'd share since the issue of black frames surfaces with some regularity.
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