Bug 459570

Summary:	Dragonplayer does not detect audio in certain videos; seemingly random.
Product:	[Applications] dragonplayer	Reporter:	fake.name
Component:	general	Assignee:	Unassigned bugs <unassigned-bugs-null>
Status:	RESOLVED UNMAINTAINED
Severity:	normal	CC:	myriam, nate, sitter
Priority:	NOR
Version First Reported In:	22.08.1
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description fake.name 2022-09-23 16:21:58 UTC

SUMMARY
***
As the title states, dragon isn't detecting any audio in certain video files. This is file type independent, and I haven't been able to observe a meaningful pattern w.r.t. which files simply fail to have their audio registered. Command line execution of functioning and dysfunctioning files of the same type reveal no difference and flag no warnings or errors.  This portends to be a failure to  detect any audio whatsoever, since "Audio Channels" doesn't become accessible, and my plasma sound widget claims no applications are playing any audio.

I have observed this with both .mkv and .avi files. I have verified that said files play correctly on a variety of different players, including bare mpv, vlc, and haruna.


STEPS TO REPRODUCE
1.  Open some particular video with dragon.
2.  No sound plays.


OBSERVED RESULT
No sound plays on some files where sound is expected, and no hints to why are given.

EXPECTED RESULT
Every file with any sound at all will play said sound or throw an error if it isn't possible to

SOFTWARE/OS VERSIONS

Linux: Arch 251, zen kernel 5.19.10
KDE Plasma Version:  5.25.5
KDE Frameworks Version:  5.98.0
Qt Version:  5.15.6

ADDITIONAL INFORMATION
The smallest file I have which generates this error is still 20 Mb in size, being a 1 minute clip from a movie. How would you like it uploaded?

Comment 1 Nate Graham 2022-11-26 05:28:15 UTC

Are you using Dragon with the GStreamer Phonon backend or the VLC Phonon backend?

Comment 2 Bug Janitor Service 2022-12-11 05:08:14 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

Comment 3 fake.name 2022-12-14 17:42:05 UTC

(In reply to Nate Graham from comment #1)
> Are you using Dragon with the GStreamer Phonon backend or the VLC Phonon
> backend?

Gstreamer, I think (no VLC installed on system). A little digging suggests that this may be that any file which was ripped from bluray simply cannot be played with GStreamer (on Dragon) regardless of its present file format. Is that the issue?

Comment 4 Nate Graham 2022-12-14 18:06:04 UTC

Yep. and additionally, the GStreamer has been unmaintained for years. The VLC backend is the only supported one.

You don't need the VLC app itself to have the VLC backend installed.