(mediaCCC) audio language changes when switching to background player

[MathJoDE]

Checklist

• I am able to reproduce the bug with the latest version given here: CLICK THIS LINK.
• I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• I have read the FAQ and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• This issue contains only one bug.
• I have read and understood the contribution guidelines.

Affected version

0.26.1

Steps to reproduce the bug

1. Open in NewPipe https://media.ccc.de/v/37c3-12142-breaking_drm_in_polish_trains (also observed for other 37c3 Videos with translated audio tracks)
2. Click "Background" button to stop video and only play audio in background

Expected behavior

The original (english) audio continues playing.

Actual behavior

An audio track with german voice over starts playing.

Screenshots/Screen recordings

Screen recording:

Screen_Recording_20231231_162531_NewPipe.mp4

Logs

No response

Affected Android/Custom ROM version

Android 13

Affected device model

Samsung Galaxy A34

Additional information

The switch "Prefer original audio" in NewPipes "Video and Audio" Settings does not change the behaviour.

When you open the video link in a browser, there is a select for different audio traces, I did not find a corresponding switch in the newpipe app.

The system language of my phone is english, my location in germany.

[MathJoDE]

Just noticed that this bug occurs also the other way around: Videos with german original sound get english voice over when in Background. Example: https://media.ccc.de/v/b3163149-505e-497e-9c75-7cb233b59fcd

[Profpatsch]

Can confirm, it’s really quite annoying :(

[dervomsee]

Same here.

[DamageIncorporated]

can confirm this for Version 0.27.4 on Android 15. Videos from 38c3.

is the confirmation enough to remove the "needs triage" badge or is there additional information I could or should provide to help promote this issue?

[ShareASmile]

I think there is some understanding, Where you see "needs triage" badge?

"good first issue" label has already been applied to attract contributers to promote contributions to this issue.

You can upvote this issue as well.

[nils-van-zuijlen]

On https://media.ccc.de/public/events/7f4f44d8-89ea-5a84-8014-090b6ea88f3c I got the French dub in foreground but the German dub in background.
What I wanted was the original English.

I'm using English (US) as my preferred content language on NewPipe 0.27.4

[AndrianaBilali]

I can reproduce this on my Samsung Galaxy A31 (Android 12). I’d like to work on a fix. Any pointers on where to start in the code?

[AndrianaBilali]

Hi!
While investigating this issue, I found that the problem seems to be specific to this video: https://media.ccc.de/v/37c3-12142-breaking_drm_in_polish_trains
This video appears to only have a German audio file available. When I tried to directly access the English audio stream by guessing likely URLs like https://cdn.media.ccc.de/congress/2023/mp3-translated/37c3-12142-eng-Breaking_DRM_in_Polish_trains_mp3-2.mp3 (english audio) it returned a 404 Not Found, while the German version exists at https://cdn.media.ccc.de/congress/2023/mp3-translated/37c3-12142-deu-Breaking_DRM_in_Polish_trains_mp3-2.mp3.
I also tested other videos that do have both English and German audio files and they worked correctly with English selected when available.
So I believe the issue is not with the app’s logic itself, but rather with missing English audio for this specific video. That said, there may still be value in handling this case in a better way (like logging when the preferred language isn't found or showing a fallback notice).