Bug 489985

Created attachment 171505 [details]
Kdenlive Master Mute bug comparison

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SUMMARY
As I had to multitask on one system, I have to mute kdenlive while editing sometimes. so that... it wont interfere with Audio recording done by my friend on the 2nd Monitor. In this process I found a Bug in 23.04.3. But after finding the latest version (24.05.2) I wanted to check before reporting here. I can confirm even 24.05.2 too is having this same bug. Looks like it went unnoticed for some reason, maybe no one never mute master while editing. Below are the details.

By the way I am using Standalone version of the software on Windows 11 Pro.

If we mute Master in Audio Mixer and save the project without unmuting and close the Kdenlive, There is noway to unmute Master after reopening the project.

I had to open .kdenlive in a different editor and delete the Mute state of the master and save it back, to unmute it. please check the image i posted in the kde discussion or the attachment.
https://discuss.kde.org/t/i-found-a-bug-in-kdenlive-24-05-2/18427

STEPS TO REPRODUCE
1. Just open any project and click on the mute for Master in Audio mixer.
2. Save the file and close Kdenlive.
3. Start Kdenlive and open the .kdenlive file.
4. In the Audio Mixer it doesn’t show as muted and there is no way to unmute it.

OBSERVED RESULT
After reopening the project, Possibly Kdenlive is unable to read the value and  In the Audio Mixer it doesn’t show as "Muted" and there is no way to unmute it, in the GUI. When I opened it in a Winmerge editor I found that default unmute state is <property name="disable">1<property> . But if we save .kdenlive file has this value changed to "0" <property name="disable">0<property>.

EXPECTED RESULT
Kdenlive should read the value "0" and update Master Mute in the GUI to "Muted."

SOFTWARE/OS VERSIONS
Windows: 11
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version:  6.3.0
Qt Version: 6.7.1 (built against 6.7.1)

ADDITIONAL INFORMATION