SOLVED: Weird pixelation and stuttering issues when playing on Samsung TV app

[chrissous]

So Ive been coming across this really weird issue with the Tizen version of the JMP app. The only way I can explain it is that ever time there is on screen dialog (someone has a line) the video pixelates and the audio skips. It happens every time and it this point its getting pretty annoying. Ive tried even the same episode of the show I was watching on JMP on windows, my android phone (both on the network and also thru phone network and tailscale vpn) and it streamed perfectly fine. I dont know if its just the device or am I doing something wrong and Im missing it completely.

Server specs are as follows:
Trycoo MI-6 mini pc
12 gen Intel N95
16GB DDR4 3200 MHz
Linux Mint Xfce 22.1
Jellyfin Server 10.10.6

Client specs:
JMP for Tizen 0.1.0 (10.10.z)

Jellyfin Logs

FFmpeg log

If there is any more information I can give please let me know

[TheDreadPirate]

Does this happen with ALL episodes? Or just the episodes with PGS subs? It looks like the subtitles are burned in (expected). Can you tell if the PGS subs are also burned in when watching on your Windows PC and Android phone? I don't see any logs for those devices. Only the Samsung TV.

It looks like Severance S01E04 has PGS subs while S01E05 has SRT subs. Does this issue happen with episode 5 on your Samsung TV?

[chrissous]

Does this happen with ALL episodes?  Or just the episodes with PGS subs?  It looks like the subtitles are burned in (expected).  Can you tell if the PGS subs are also burned in when watching on your Windows PC and Android phone?  I don't see any logs for those devices.  Only the Samsung TV.

It looks like Severance S01E04 has PGS subs while S01E05 has SRT subs.  Does this issue happen with episode 5 on your Samsung TV?

I just checked several episodes real quick on my TV. S01E03 it happens (subtitles say SUBRIP), S01E04 (with PGS subs) is working fine, S01E05 (SUBRIP as well) it happens.

Now forgive my ignorance as I am new at this, but how would I tell if the subtitles are burned in? Im not quite sure what that means, unfortunately. When I do check for that, would I posting the jellyfin log or the ffmpeg log? (current ones, of course.)

By the way thank you for helping me!

[TheDreadPirate]

In the ffmpeg log you provided, for S01E04, there is this block of text.

Code:

Stream mapping:
  Stream #0:0 (hevc) -> setparams:default
  Stream #0:2 (pgssub) -> scale:default
  overlay_qsv:default -> Stream #0:0 (h264_qsv)
  Stream #0:1 -> #0:1 (copy)

If the client was direct playing the subtitles, the pgssub and overlay_qsv lines wouldn't exist.

So it seems that the TV's rendering of SRT subs (SUBRIP) is bunked. Which the TV would be direct playing. Do you have any themes applied to Jellyfin? Did you make any changes to the subtitle rendering settings in Jellyfin?

Settings > Subtitles. The section in the bottom half about adjusting subtitle size and appear.

[chrissous]

I dont remember changing any themes, so I guess not.

I did however check the subtitles settings on the TV and took a screenshot of the web client and they both have the same settings.
   

[TheDreadPirate]

I THINK those settings are per-client and checking it on one device would not show how it is configured on another.

But I doubt that is the problem anyway.

Can you find an entirely other show, or movie, with SRT subs and play it. I want to see if the problem is ALL SRT subs, or just the subs that came with Severance.

[chrissous]

I THINK those settings are per-client and checking it on one device would not show how it is configured on another.

But I doubt that is the problem anyway.

Can you find an entirely other show, or movie, with SRT subs and play it.  I want to see if the problem is ALL SRT subs, or just the subs that came with Severance.

I will get you that and post results. I understand its per client, but they both had the same settings fwiw

[chrissous]

Tried another movie (Naked Gun) and it had SUBRIP subtitles, video and audio were fine. But there was no subtitles. Then I tried another movie (Men In Black) and it worked just fine. Heres the most recent logs.

Jellyfin log (w/ additional test from Windows PC and Android phone)

I also found ffmpeg logs both titled DirectStream and Transcode

   

[TheDreadPirate]

DirectStream = audio transcode only

In that instance there would be no subtitle burn in, if subtitles were enabled.

I don't see anything in the log regarding why subtitles Naked Gun didn't work and why subtitles worked in Men in Black. Direct playing a file results in very little logging.

But the fact that SRT subs weren't garbled up is a good sign. Or, at the very least, that the more likely culprit are the SRT subs in your videos and not a client bug or something.

One thing I did notice is that Jellyfin did not need to extract the subtitles from Men in Black, but were extracted from Severance. Not sure if that is because they were already extracted from having been watched before or if the Tizen client did not need the subtitles to be sent as a separate stream (the reason they would be extracted).

Can you do the following.

1) Install the "Subtitle Extract" plugin. It is in the official repo so it should be in the "Catalog" as an available plugin.
2) Restart Jellyfin
3) Go to Severance, click on the "..." context menu and "Refresh metadata". Select "replace all metadata" from the drop down.
4) Once that finishes, go to Dashboard > Scheduled Tasks. In the "Library" section, there is a task called "Subtitle Extract". Run it.
5) Once that finishes, try playing Severance S01E03 again.

If they are STILL garbled, can you try configuring Jellyfin to burn in all subtitles? Settings > Subtitles > set "Burnin subtitles" to "All".

[chrissous]

One thing I did notice is that Jellyfin did not need to extract the subtitles from Men in Black, but were extracted from Severance.  Not sure if that is because they were already extracted from having been watched before or if the Tizen client did not need the subtitles to be sent as a separate stream (the reason they would be extracted).

You would be correct in that assumption

Can you do the following.

1) Install the "Subtitle Extract" plugin.  It is in the official repo so it should be in the "Catalog" as an available plugin.
2) Restart Jellyfin
3) Go to Severance, click on the "..." context menu and "Refresh metadata".  Select "replace all metadata" from the drop down.
4) Once that finishes, go to Dashboard > Scheduled Tasks.  In the "Library" section, there is a task called "Subtitle Extract".  Run it.
5) Once that finishes, try playing Severance S01E03 again.

If they are STILL garbled, can you try configuring Jellyfin to burn in all subtitles?  Settings > Subtitles > set "Burnin subtitles" to "All".

Did exactly all that on the servers web client and it still had the issue. I even turned subtitles off and it *still* had the same issue


Here is the latest log

Woah disregard that, I was being an impatient dummy and jumped the gun. I didnt see the last line about the burning in all subtitles until after I hit post. Yes, changing that dropdown menu on "Burn Subtitles" to "All" and checked "Always burn in subtitle when transcoding" and it works now! Thank you so much!