I have the same experience with my RPi4, but to me it seems the stuttering is only happening when I have subtitles enabled. I mostly use srt files and today I watched an episode of the shows I watch with subtitles off for 30 minutes, with no stuttering, and then I enabled subtitles and stuttering began immediately. I also think the stuttering only happens when there's actually subtitle text on screen i.e. if there's no talking there's no stuttering.
I've been using all alphas and now this beta on my RPi4 which is connected to a 1080p projector.
What I've noticed is that when video output is [email protected] and playing video that is 24fps (23,976) there is a lot of irregular stutter, regardless if "sync video to display" is enabled or not. The ctrl+shift+o menu reports no drops or skips, but playback is perceived as if there are significant framedrops.
On the other hand if I use [email protected] then there is no stutter at all, however my projector does pulldown poorly and panning looks less smooth (no stutter but what I think is called judder?).
I've had my projector for many years and using a more powerful machine, i.e. my gaming PC, I can do [email protected] with perfect video playback in Kodi. I understand that the RPi4 is not nearly as powerful, but since there is not stutter in 60hz I don't think it's a performance issue but a GPU driver issue.
With .001 I only used ethernet, but now with .002 I’ve only used 5 GHz wi-fi because I’m at a different location (same ambient temp, no case, no heat sink, no fan) and idle temp has increased quite a lot, about 8 degrees C. Is this to be expected?
Is updating inside of LibreELEC not supported for Alpha builds? I've rebooted my Pi4 several times since yesterday but there is still nothing in the update section. I changed it to manual but there's no difference.
I'm a little confused about versions. The alpha1 for Rpi4 is supposed to be LibreElec 9.2? The only image I've found on the site is LibreELEC-RPi4.arm-9.1.001.img.gz. Is it a typo or what am I missing? In System information on my Pi4 with LibreElec it also says "LibreElec (official): 9.1.001". Where can I find 9.2?
I did the USB3 host adapter firmware update and my idle temp has dropped from 54°C to 51°C (no case, no fan, no heatsink). Ambient is 23°C.
An update since I figured I'd take my chances and buy an RPi4 despite no reports on how the Plex add-on works regarding HEVC video.
Installation of LibreELEC was as expected a breeze with Rufus.
I installed the Plex add-on, signed in, and voila, HEVC 1080p material can be played without any transcoding on the server, over WAN, perfect hardware accelerated playback!
I'm thinking of buying an RPi4 instead of a Chromecast Ultra to use when I'm away from home as a Plex client by using the Kodi Plex Add-On to play mostly HEVC 720p and HEVC 1080p material. At the moment I mostly have access to regular Chromecasts, e.g. at my parents home, and gen1 and gen2 Chromecasts don't support HEVC so Plex has to transcode which is not preferable because the server CPU is maxed out when transcoding HEVC to H264.
The Kodi Plex Add-On have a setting to allow HEVC, and hardware acceleration of it works in Kodi on my Windows laptop, so I wonder if the RPi4 will be able to do that as well?
Does anyone of you who owns an RPi4 and use the 9.2 Alpha also use Plex?