My 8-core, vega 64 machine is snagging or skipping frames with video playback. I'm trying to play 2x 4k prores 422 files. The issue is it snags or hangs on a ~1-4 frames intermittently (usually about 3-10 seconds apart), even playing in QT or VLC. It occurs more often with an external monitor, but without one it is still there.
Lower/different resolutions do not solve it, codec type (tried h264/h265, HAP, prores LT/422/HQ/4444), source of the clip (my edit or a video downloaded from the web), frame rate (29.97, 30, 59.94, 60), multiple usb-c to HDMI vendors and HDMI cables and lengths, different displays (4k + 1080p). I've tried 10.13.6, Catalina Beta, and 10.14.6 (current and the least occurrences).
I've been having this issue for 4 months now and after a new logic board replacemtn, and multiple emails with apple escalation I still haven't found an issue, and Apple Care have gone silent.
Now I could understand this being an issue that 99% of the users wouldn't even notice. Hell, apple engineers couldn't see the issue in the 120fps video i took of the screen when it was happening. But I'm projecting on a 30 foot screen for a permanent installation and when it snags a frame, it jumps 8-16 inches when it finally plays the next frame so its really stinkin' noticeable.
I found that the best way to see it happening on a normal sized display is to make a video with a white or black bar with a contrasting background bounce back and forth, export the video and watch it in quicktime with an external monitor plugged in.
Has anyone encountered this and resolved it?
Another bit of info: when I drop the prores file into a Premiere Pro timeline and activate the dropped frame indicator icon, I can watch it skip and snag, yet the indicator says no dropped frames. Its like the frame hand-off from the GPU to the display is faulty.
Lower/different resolutions do not solve it, codec type (tried h264/h265, HAP, prores LT/422/HQ/4444), source of the clip (my edit or a video downloaded from the web), frame rate (29.97, 30, 59.94, 60), multiple usb-c to HDMI vendors and HDMI cables and lengths, different displays (4k + 1080p). I've tried 10.13.6, Catalina Beta, and 10.14.6 (current and the least occurrences).
I've been having this issue for 4 months now and after a new logic board replacemtn, and multiple emails with apple escalation I still haven't found an issue, and Apple Care have gone silent.
Now I could understand this being an issue that 99% of the users wouldn't even notice. Hell, apple engineers couldn't see the issue in the 120fps video i took of the screen when it was happening. But I'm projecting on a 30 foot screen for a permanent installation and when it snags a frame, it jumps 8-16 inches when it finally plays the next frame so its really stinkin' noticeable.
I found that the best way to see it happening on a normal sized display is to make a video with a white or black bar with a contrasting background bounce back and forth, export the video and watch it in quicktime with an external monitor plugged in.
Has anyone encountered this and resolved it?
Another bit of info: when I drop the prores file into a Premiere Pro timeline and activate the dropped frame indicator icon, I can watch it skip and snag, yet the indicator says no dropped frames. Its like the frame hand-off from the GPU to the display is faulty.