Casting to Chromecast Ultra not working via docker/Synology

[zutroi67]

Sorry, I'm not sure where to start.
I'm running Jellyfin in a docker container on my Synology NAS.
I'm no genius, so setting this up to run was a bit of a personal nightmare. But thanks to excellent guides online, I managed to set it up and get it running nicely.

After a recent upgrade (I'll list my versions below) I noticed that my Rick and Morty episodes were not playing. I have watched all of the episodes many, many times. I now get a weird error in a message box on my Samsung Galaxy S4 pad: "Playback Error: MessagePlaybackErrorundefined"

My setup:
Jellyfin 10.9.5 on Synology DS411+II (DSM6.2.4-2556 update 7) via docker (20.10.3-0554) container.
FFMpeg4 (4.4.4-49)
Chromecast Ultra (firmware 1.56.281627) via wifi
Running from Samsung Galaxy Tab S4 tablet, Android 10
Jellyfin Android app 2.6.1 with data on an external SSD for speed.

I have narrowed down the problem: the video encoding profile and hence, the video resolution.

To simplify, this WILL play:
Format                                : AVC
Format/Info                         : Advanced Video Codec
Format profile                      : Constrained Baseline@L3.1
Codec ID                             : V_MPEG4/ISO/AVC
Bit rate                                : 1 889 kb/s
Width                                  : 1 280 pixels
Height                                 : 720 pixels

And this WILL NOT play:
Format                                : AVC
Format/Info                         : Advanced Video Codec
Format profile                      : Constrained Baseline@L4.1
Codec ID                             : V_MPEG4/ISO/AVC
Bit rate                                : 1 500 kb/s
Width                                  : 1 920 pixels
Height                                 : 1 080 pixels

The same video, encoded with a different profile (maximum of HIGH@3.1) will play. Anything at level 4 or higher won't cast/play. This means that I can't play anything at a higher resolution than 720P. Videos I have always watched are no longer viewable, and the Jellyfin logs are as clear as mud.

I have transcoding turned off as my Synology hardware isn't up to the task.

This only started happening after the recent Jelly upgrade.
I have been searching everywhere for help or to find others with my problem, but I cannot find help anywhere.

Any ideas? As far as I can tell, the Jellyfin log doesn't list this error, or if it doesn't, I can't find it.
zutroi

[TheDreadPirate]

The Chromecast Ultra supports up to, at least 1080P H264@level 4.2. So the codec level is not the problem.

Can you share your jellyfin logs via pastebin?

[theguymadmax]

My setup:
Jellyfin 10.9.5 on Synology DS411+II (DSM6.2.4-2556 update 7) via docker (20.10.3-0554) container.
FFMpeg4 (4.4.4-49)

Your FFmpeg version is too old. Update to the latest.

[zutroi67]

Sorry, the Jellyfin logs state:
ffmpeg version 6.0.1-Jellyfin Copyright © 2000-2023 the FFmpeg developers

The FFMpeg4 version is the Synology version installed (I've since updated that too.)

[TheDreadPirate]

I think 4.4 is new enough. But I'd still like to see the full logs so I can see what it is doing.

[zutroi67]

Moat of the playing errors don't make it into the Jellyfin logs. I don't understand this. Is it the Android app failing to even start the send to the Jellyfin docker? Anyway, here is the log from yesterday that actually features a successful play of a file and several failed attempts. Further to my video profile theory, Jellyfin played a "high@41" profile 720P video yet failed to play another video of the same profile in the same video release series (same encoding, same settings.) I am completely at a loss. Thanks.

https://pastebin.com/H1yEqwMU

[theguymadmax]

Post your ffmpeg logs as well.

You have the below error in your log, I don't think that's the cause of your issue, but you should go ahead and fix it.

System.IO.IOException:The configured user limit (8192) on the number of inotify watches has been reached, or the operating system failed to allocate a required resource.

• Go to Control Panel > Task Scheduler.
  
• Create a New Task > Triggered Task > User-defined script.
  
• In General Settings tab: give it a name (e.g. “sysctl inotify fix”) and Event = Boot-up.
  
• In the Task Settings tab: enter this in the Run Command box:
  
  Code:

  sh -c '(sleep 90 && echo 204800 > /proc/sys/fs/inotify/max_user_watches)&'
  
  

Source

[TheDreadPirate]

So you are using the ffmpeg built into Jellyfin. Good.

Code:

[2024-07-08 11:23:05.438 +00:00] [INF] [1] MediaBrowser.MediaEncoding.Encoder.MediaEncoder: Found ffmpeg version "6.0.1"

Can you try turning on remuxing? A potato can remux, so your NAS should be able to handle that.

Code:

[2024-07-08 11:33:29.543 +00:00] [INF] [12] Jellyfin.Api.Helpers.MediaInfoHelper: User policy for "zutroi67". EnablePlaybackRemuxing: False