Bug 469223

Summary:	audio outages at begin of playing
Product:	[Applications] kasts	Reporter:	joerg
Component:	general	Assignee:	bart
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	joerg
Priority:	NOR
Version First Reported In:	23.04.0
Target Milestone:	---
Platform:	Flatpak
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description joerg 2023-05-01 07:48:59 UTC

SUMMARY
***
Playback has 2-4 short outages (each outage ~1/4 second or so)
- happens on start
- happens after pause
- happens on start of a new episode
***


STEPS TO REPRODUCE
1. set playback speed (to 1.5)
2. pick VLC-Player as audio engine

OBSERVED RESULT
gaps in played audio stream

EXPECTED RESULT
no gaps

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version:  5.105.0
Qt Version: 5.15.9

ADDITIONAL INFORMATION
flatpak based installation on mobian (debian for mobile) on a pinephone
if BT headset is used (instead of speaker), the number of outages increase
could the issue be solved by increasing the buffer/cache on VLC-Player?

Comment 1 bart 2023-05-01 12:35:09 UTC

Can reproduce.
I currently don't have a clue why this happens in the flatpak version, but not in the native one.

Comment 2 bart 2023-05-02 07:37:48 UTC

BTW, all buffers/caches are already set to 10 seconds.
I see a few other reports about VLC stuttering audio after resuming playback at higher playback rates, but no solutions.  There is/are apparently (a) bug(s) filed against VLC for this.
In view of this, I would say that this is an upstream issue that we can't do much about.
I'll leave this report open for now.  Maybe some more researching might yield something.

Comment 3 bart 2024-04-18 13:19:22 UTC

Sorry, but I'm going to close this.  There is nothing that Kasts itself can do to resolve this (minor?) issue.
This is solely an upstream problem of libvlc.
I would suggest to open a ticket against the upstream project if you think it's important enough to get this resolved.