Problem with TV Records *.ts files - wrong video codec

[Mister G]

I have installed Jellyfin Version 10.5.5 on my Synology DS923+

The Problem that I have is, that Jellyfin doesn't play some TV Records (from RTL) which are recorded from TechniSAT Sat Recorder Digit ISIO S3 in the ts Format.

The Video Codec that Jellyfin shows is 144p SDR but that ist the wrong Videocodec of the *.ts files as is has also a stream with the video codec MPEG2VIDEO. In my opinion, using the wrong video codec is what causes the Jellyfin player to crash.
 
The VLC Player does play the files correctly but only if I start them in the VLC Player (not the vlc Player in Jellyfin).

It would be great if someone could help me here. Maybe it is also a problem that other users have with Jellyfin.
.Plplay the file in MPE G2VIDEMPEG2MPEG2VIDE dd

[TheDreadPirate]

What is shown is the Title field of the video, not the codec. Some encoders will include or append the title with the codec and resolution, but not always.

The reason the playback is failing is 99% likely because you did not configure transcoding correctly or permissions for writing the transcode files. I'm leaning towards the latter, write permissions issue, since you are using software AV1 encoding (not recommended).

Can you share the ffmpeg logs that Jellyfin generates. It is located in the same directory that you got the Jellyfin log from.

[Mister G]

Thank you for the very quick answer to my problem. 
I created the error again by playing such a .ts file and found 3 ffmpeg log files for the process in the log directory (inserted here).

[TheDreadPirate]

Did you install Jellyfin from Synology's "app store"? This is the error message that is preventing playback.

Code:

Error opening output file /volume1/@appdata/jellyfin/cache/transcodes/9bb13ec9baa1bd2cfe419a54e29edb76.m3u8.
Error opening output files: Invalid argument

I'm wondering if the vanilla ffmpeg that Synology uses is the problem. Jellyfin-ffmpeg is a heavily customized version of ffmpeg. It isn't just a re-label.

[Mister G]

Yes, I didn't install it in docker but via the SynoCommunity via  https://packages.synocommunity.com/ . The installation is very easy. The installation also requires ffmpeg 7 (current version 7.0.2-1) and SynoCli Videodrivers (current version 1.2.2), which is then immediately required when installing Jellyfin.

Do you have an idea to fix the problem or should I perhaps contact the SynoCommunity directly?

By the way, thank you very much for the very quick help here

[Efficient_Good_5784]

I would go ask for help in SynoCommunity's help rooms.

If you want, you can also switch to using the official Jellyfin Docker image by using Synology's Container Manager.
You can see how here: https://forum.jellyfin.org/t-guide-runni...er-compose