AppleTV 4k and 1080p video stutter

Video Playback
1

I’m running into issues with 1080p playback, while 4K runs completely fine. What happens is that every now and then the video stutters heavily for a few seconds, then goes back to normal. This keeps happening throughout the entire movie. Strangely, I never get this problem with 4K content.

If I rewind to the part where the stutter happened, it doesn’t occur again. I really can’t figure out what’s causing it. The issue shows up both with “Match frame rate” enabled and disabled. When it’s disabled, I manually set the refresh rate (59.97Hz for 23.976fps and 60Hz for 24fps).

2

What Apple TV do you have?

There is an issue with 1080p content WITH Dolby Vision on first gen Apple TV 4Ks:

Playback issue with 1080p HDR/DV files (1st gen ATV4K) - Platforms / Apple TV - Firecore

3

I have the latest generation Apple TV 4K, and the files in question are 1080p, no HDR, no Dolby Vision.

4

Then I don’t know. :smiley:

5

It doesn’t make sense, but have tried to set the cache size to another setting?

6

Are you seeing this issue in the new 8.2.3 release?

If so, could you send in one of the files you are seeing issues with so we can review it here?

7

More things to try

  1. Check the upscale options
  2. Make sure you have auto rate on in the Apple TV settings.

It happens to me and something caused that Apple TV setting to turn off.

8

No, I still haven’t tried with version 8.2.3

9

There is no setting to increase cache

10

I tried the upscale option, both automatic and non -automatic. The problem is always there. The auto rate in the Apple TV I have to keep it deactivated otherwise it causes me a slight out of synch audio-video (problem known with Apple TV and audio output on homepod 2)

11

I get a similar problem on my 2nd gen ATV4K. Mostly notice it on 1080p 25fps TV episodes. It’s not always repeatable though (I can skip back a bit and then the same section will play OK).

4K playing from the same location is OK.

12

Does your TV support QMS (Quick Media Switching) and do you use it?

I had the same issue and disabling QMS (but keeping Match Frame Rate enabled) fixed it. It appears to be broken, as in not matching the frame rate correctly, and I’m not sure if it’s broken in Infuse, the Apple TV or the TV itself (Samsung S95F in my case).

The reason 4K videos don’t stutter is that they are likely in HDR/DV, in which case QMS doesn’t work because the TV still has to fade to black for the change in dynamic range.

@james It would be great if the devs could check if it’s an issue with Infuse because QMS is a great feature and works fine with all of my other apps (where it’s mostly switching between 50 and 60Hz content).

13

I don’t get it. You prefer QMS over native HDR?

That doesn’t make sense. You will be losing a lot…

But if you do, just leave the auto rate ON but turn the Auto Range OFF.

I wouldn’t do that, though. HDR is worth the blank frames.

14

Perhaps my wording was a bit misleading. HDR works regardless of whether QMS is enabled or not.

What I meant by “HDR/DV, in which case QMS doesn’t work” is that when the TV switches to HDR, QMS doesn’t function like it does without a change in dynamic range (SDR like most 1080p content), where playback starts immediately without a black frame. This is because the TV still has to black out for the switch to HDR. This switch then seems to trigger the frame rate matching correctly, even when QMS is enabled.

15

I’m having the same issue.
Have infuse pro 8.2.7 (5381)

seems to have occurred recently, the same content plays on the same TV via Jellyfin app without issue.

Just realized the Apple TV OS hasn’t updated, trying that now

Update: think it’s better, after updating the appleTV os