Endless buffering on 24hz movies

[anderse77]

Bug report

Describe the bug

Here is a clear and concise description of what the problem is:

24hz movies (3840x2160 24.00hz, dolby vision p7 FEL) stops due to buffering often. Looking at the playerprocesswindow this seems to be due to the cache being emptied faster than it refills. This does not happen with 23.98hz movies (3840x2160 23.98hz, dolby vision p7 FEL)I have adaptive readfactor in settings, 192mb memorysize and a cachechunk of 1 mb.

Expected Behavior

Here is a clear and concise description of what was expected to happen:

The 24hz movies (3840x2160 24.00hz, dolby vision p7 FEL) should play smoothly without ever stopping for buffering.

Actual Behavior

24hz movies (3840x2160 24.00hz, dolby vision p7 FEL) stops due to buffering often.

Possible Fix

To Reproduce

Steps to reproduce the behavior:

1. Start a 24hz movie ((3840x2160 24.00hz, dolby vision p7 FEL).
2. Play it for 20 minutes and it will stop somewhere due to buffering. It will play smoothly until it stops due to buffering.
3. Do the same with a 23.98hz movie (3840x2160 23.98hz, dolby vision p7 FEL). It will play smoothly.

Debuglog

The debuglog can be found here:

https://paste.kodi.tv/odadusuxef

Screenshots

Here are some links or screenshots to help explain the problem:

Additional context or screenshots (if appropriate)

Here is some additional context or explanation that might help:

I want to be able to watch movies I ripped from my own UltraHD Bluray disks.

Your Environment

Used Operating system:

• Android
• iOS
• tvOS
• Linux
• macOS
• Windows
• Windows UWP

CoreElec(cpm)

• Operating system version/name:
  CoreELEC-Omega_devel_20241019053905
  hdmi 2.1, cat 8 ethernet cable, 1000mb/s internet connection, nfs share.

note: Once the issue is made we require you to update it with new information or Kodi versions should that be required.
Team Kodi will consider your problem report however, we will not make any promises the problem will be solved.

[chucky88]

did you also test this on a normal nightly build? There were some buffering related changes in the base CE code some days ago, so it might be due to that and not a cpm-specific issue.

[anderse77]

Yes. Same issue. ons 23 okt. 2024 kl. 13:12 skrev chk-dev ***@***.***>:

…

did you also test this on a normal nightly build? — Reply to this email directly, view it on GitHub <https://github.com/cpm-code/xbmc/issues/29#issuecomment-2431764084>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACMHKUAXH4HR4YGX22N2EBLZ46AC5AVCNFSM6AAAAABQOQVMQ2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDIMZRG43DIMBYGQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[chucky88]

Yes. Same issue. ons 23 okt. 2024 kl. 13:12 skrev chk-dev @.>:
…
did you also test this on a normal nightly build? — Reply to this email directly, view it on GitHub <#29 (comment)>, or unsubscribe https://github.com/notifications/unsubscribe-auth/ACMHKUAXH4HR4YGX22N2EBLZ46AC5AVCNFSM6AAAAABQOQVMQ2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDIMZRG43DIMBYGQ . You are receiving this because you authored the thread.Message ID: @.>

then I would suggest reporting it to the CE team via the official forum as it's not related to cpm's build (with logs, video samples, etc)

[chucky88]

@anderse77 btw, also pls mention there if the file was played via network or local/USB storage.

[anderse77]

It was played via nfs networkSkickat från min iPhone23 okt. 2024 kl. 14:04 skrev chk-dev ***@***.***>: @anderse77 btw, also pls mention there if the file was played via network or local/USB storage. —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you were mentioned.Message ID: ***@***.***>

[frodo19]

It was played via nfs network

I use NFS share in my nas too. In the last modification what CE team has provided about the dinamic buffers, the system seems very well load.
Its able to me to disable completelly the buffer in kodi setting. No single issue by me. Tryed with high bitrate Jellyfish sample, 400Mbps no iisue. DV fel mkv with 110Mbps and 8Mbps dts-x sound, 4K 59,94fps HDR movie no issue.
Im not see the buffering anymore.

[chucky88]

btw, if I'm not mistaken this new buffer experiment might have been removed in the current code/nightlies. At least I don't seem to see those commits anymore (they were one of the last ones). But will have to check again, maybe they have reorganized the code the they are moved now somewhere lower or via patch...
EDIT: yeap, seems like these experimental buffer changes were removed a few days ago:

Videoplayer: continue output frames until buffer of render manager is empty  
VideoPlayer: Add dynamic buffer level handling

[frodo19]

btw, if I'm not mistaken this new buffer experiment might have been removed in the current code/nightlies. At least I don't seem to see those commits anymore (they were one of the last ones). But will have to check again, maybe they have reorganized the code the they are moved now somewhere lower or via patch... EDIT: yeap, seems like these experimental buffer changes were removed a few days ago:

Videoplayer: continue output frames until buffer of render manager is empty  
VideoPlayer: Add dynamic buffer level handling

I hope they just missed, cos its works perfectly for me..
I dont use the nightlyes just the cpm builds, hopefully this will stay..