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25fps material at 50fps stutter

Nvidia Shield TV Video playback support subforum
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cosmoxl
Posts: 731
Joined: 12 Dec 2015, 14:16

25fps material at 50fps stutter

Post by cosmoxl » 22 Jul 2017, 13:12

I'm making a new thread on the problem since my post in the other thread got no attention. I'll make a github post if I have to.

https://pastebin.com/SFwNQYGk

There is a log of playback where 25fps material doesn't playback smoothly at 50fps. Irregular stutter becomes more and more frequent to where it's unwatchable.

Just as an aside, I can manually set my shield to 50fps and watch the same file in the plex app (refresh rate switching off) and it's beautiful. (I can't let plex automatically switch for these files as it tries 25fps which my TV seems to not support.)

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davilla
Team MrMC
Posts: 2343
Joined: 26 Oct 2015, 17:01

Re: 25fps material at 50fps stutter

Post by davilla » 23 Jul 2017, 13:19

NOTICE: Found resolution 1920 x 1080 for display 0 with 1920 x 1080 @ 25.000000 Hz
NOTICE: Found resolution 1920 x 1080 for display 0 with 1920 x 1080 @ 50.000000 Hz

Both 25 and 50 are reported as present for your display.

Switches from 59.97 to 50.
NOTICE: Display resolution ADJUST : 1920x1080 @ 50.00 - Full Screen (18) (weight: 0.000)
CEGLNativeTypeAndroid: SetNativeResolution: 1920x1080@50.000000 3

After the initial 'DEBUG: CDVDClock::ErrorAdjust', log is quiet until you stop. So nothing dropped or skipped. Strange. What do you see if you bring up codec info ?

cosmoxl
Posts: 731
Joined: 12 Dec 2015, 14:16

Re: 25fps material at 50fps stutter

Post by cosmoxl » 23 Jul 2017, 17:51

davilla wrote:
23 Jul 2017, 13:19
NOTICE: Found resolution 1920 x 1080 for display 0 with 1920 x 1080 @ 25.000000 Hz
NOTICE: Found resolution 1920 x 1080 for display 0 with 1920 x 1080 @ 50.000000 Hz

Both 25 and 50 are reported as present for your display.

Switches from 59.97 to 50.
NOTICE: Display resolution ADJUST : 1920x1080 @ 50.00 - Full Screen (18) (weight: 0.000)
CEGLNativeTypeAndroid: SetNativeResolution: 1920x1080@50.000000 3

After the initial 'DEBUG: CDVDClock::ErrorAdjust', log is quiet until you stop. So nothing dropped or skipped. Strange. What do you see if you bring up codec info ?
What in particular are you wondering about re codec info? I agree - codec info shows there are no problems. But, the cadence keeps failing or something. Could tightening up the refresh rate range with advancedsettings.xml (like in that other thread) fix the problem?

cosmoxl
Posts: 731
Joined: 12 Dec 2015, 14:16

Re: 25fps material at 50fps stutter

Post by cosmoxl » 08 Nov 2017, 14:21

Davilla, just want to bring this up again.

I'm watching the new Blue Planet series, 25fps material, and MrMC changes to 50fps and there is occasional stutter.

Playback in Plex on the Shield TV is at 25fps, not 50, and is smooth.

Playback on the ATV4 at 50fps is smooth.

Playback on a Roku Ultra OS8 (which now has auto switching) is at 25fps and is smooth.

Something needs fixing here.

1) Can you get MrMC to switch to 25fps for 25fps material?
2) Even at 50fps there shouldn't be stutter.

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