Display MoreAfter some more testings I can do a very educated guess, that the video issues are really related to audio configuration !
I've previously said that disabling audio pass trough gives me a perfect video experience, but some of you could not confirm this.
So, I've looked deeper in this issue and found that:
a) If the audio output has 4.0 or more channels there are always artefacts in video. For both 23.976 and 25 fps (at a video output on 1920x1080).
b) If the audio output is less than 4.0 (2.0, 2.1, 3.0, 3.1), video plays perfect and smooth.
So, I'm now forcing 2.1 audio output trough HDMI and either video files and live-tv are playing great.
This is true for audio pass-trough enabled or disabled - of course that only with audio pass-trough disabled, you can guarantee the output format.
This is just a quick turn-around to help diagnose this "audio configuration that implies issues in video playback"
Hey there. First time poster here. Been playing with my Pi4 for a week looking to replace my Pi2 / libreelec and I was having all kinds of issues. This thread helped point me in the right direction to solve some and along the way I found something that may help ya here, nvidias - try changing your audio "output configuration" from "optimized" to "fixed". I was having the same poor playback at 5.1 that went away at 2.0....now I can go back to 5.1. Note the default limit for sampling will be the 48khz displayed a few lines below that setting. I've turned mine up to 192 and so far no issues.
This morning I was convinced my Pi4 wouldn't handle certain datastreams due to mpeg2 format...Now it's working very well.
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