ČR Plus radio stream issue on Docker under Debian (ref#C15HW2)

Support
1

Hi! What’s not quite right with Roon?

· None of the above quite fits

None of the above quite fits

· None of these quite match

Tell us what's going on

· Hello,

I am running the Roon service on a QNAP TBS-464 NAS. I have now moved it into Docker under Debian.
What is not working now is the ČR Plus radio stream. Other radio stations work fine, but unfortunately this is the one I listen to regularly. I’m also unable to set it up manually in My Live Radio (see the screenshot).

Do you have any solution?

Best regards,
Pavel Dlabola

Tell us about your home network

· TP link router, Qnap TBS 464 NAS, RJ45 network and 3 zones (Moon MiND, McIntosh RS150 and RPi DAC+)

2

Hello @Pavel_Dlabola

Thank you for reaching Roon support.

I think the next step here is to enable some diagnostics on your account so our technical staff can get some more insight into what’s going on here.

However, before I enable this feature, I’d like to ask for your help in ensuring we gather the right information.

First, can you please reproduce the issue once more and note the time at which the error occurs? Then respond here with that time, and I’ll make sure we review the diagnostics related to that timestamp.

3

Hi, right now at 18:20

Screenshot_20260420_182004_Roon
Screenshot_20260420_182004_Roon1080×2400 171 KB

4

Hi @Pavel_Dlabola,

Thank you for waiting patiently as we looked into this report. We’ve identified the relevant error in logs.

Is this a minimal container? Roon is failing to decode both the AAC and the mp3 stream because it doesn’t have access to the relevant helper binaries. But since other stations are working fine, this might be a known and ticketed issue with Roon’s HTTP vs HTTPS handling that affects certain streams.

Warn: [zoneplayer] I/O Failure While Opening Sound: icy://rozhlas.stream/plus_high.aac: Read failure: ExternalProcMissing

Try ensuring that you can play the stream in this docker outside of Roon, something like:

ffmpeg -i http://rozhlas.stream/plus_high.aac -f null -

Plus has richer metadata than the other ČR streams, so it unfortunately makes sense that it would manifest this issue when the others work fine. The team has a ticket in the pipeline for this issue. Thank you for your patience in the meantime.

Did this station play before you moved Roon to the docker?

5

Docker is running Debian 13 (Trixie). Unfortunately, this setup was recommended by AI, so it seems some packages for AAC decoding were missing.

The station was working before moving Roon into Docker.

I therefore installed ffmpeg and ca-certificates, and now playback of the ČR Plus station works correctly.

Thanks for your help. I’m just a user, so at first it didn’t occur to me to look for the issue in the Roon logs.

Pavel

6

Hi @Pavel_Dlabola,

Great to hear that installing ffmpeg and ca-certificates got ČR Plus playing again.

Thanks for confirming the fix. We’ll mark this thread for closure, and enjoy your Roon experience!