Preview window not visible in 22.04

piundpa · May 27, 2022, 11:14am

What is your operating system?
openSUSE Leap 15.3, GNOME/X11 environment.

What is your Shotcut version (see Help > About Shotcut)? Is it 32-bit?
22.04.25 (flatpak). It’s 64bit.

Can you repeat the problem? If so, what are the steps?
Open a previously saved .mlt file. The preview Window is not visible. Nothing happens when I click the “play” button or double-click on an item in the input list.
Same effect if I create a new project. Switching display method from openGL to Mesa didn’t change anything.

The problem didn’t occur with previous versions of the shotcut flatpak package (last tried roughly 1 month ago). The problem also doesn’t occur with the openSUSE native package for Leap 15.3 (21.03.21). I’m currently using the native package as a workaround, but I’d like to be able to use shotcut 22.

shotcut · May 27, 2022, 3:31pm

I do not reproduce it on Ubuntu 20.04. You can use 22.04.25 version by AppImage or portable from our download page. It would help a little to know if that build works for you.

uncleremus · May 28, 2022, 10:42pm

I have the same issue here, also on openSUSE 15.3. Will check other options later.

uncleremus · May 29, 2022, 5:31pm

The AppImage works, indeed. So it’s apparently a problem with the Flatpak, probably some sandboxing / permission issue. Any idea what to watch for?

@shotcut, when you said “I do not reproduce on Ubuntu 20.04”, did you mean the Flatpak or AppImage?

shotcut · May 29, 2022, 6:23pm

Flatpak. I test it briefly after I update it.

github.com/mltframework/shotcut

preview window not visible

opened 06:14PM - 29 May 22 UTC

mwilck

It happens with shotcut 22.04.25. Environment is openSUSE Leap 15.3. The prev…iew window (more precisely, the media being previewed) is not displayed. Everything else seems to work fine. I suppose it's a permission / sandboxing problem. But I'm unsure what to look out for. Already reported on [the Forum](https://forum.shotcut.org/t/preview-window-not-visible-in-22-04/33986/4), but it seems to be flatpak-specific (doesn't occur with the AppImage from flathub.org). The following screenshot illustrates the issue: ![Screenshot from 2022-05-29 20-01-24](https://user-images.githubusercontent.com/15961354/170884810-d1da9405-da6f-40c9-8c52-2d510fb56e7c.png). You can see that the grid is displayed, but the video image (actually, a still photo in this case but that doesn't matter) is not. I have enabled all available permissions in FlatSeal, but that didn't help. Running with `flatpak run --devel` didn't help, either. Hints for further debugging would be appreciated. The only error I could see in the [Shotcut output](https://github.com/mltframework/shotcut/files/8793968/shotcut-debug.zip) is related to pulseaudio (but the pulseaudio socket is enabled; this was a log from a run with all permissions enabled).

uncleremus · May 29, 2022, 9:37pm

Thanks. So it looks like an issue between flatpak and the OS I had hoped for something eaiser.

shotcut · May 29, 2022, 9:51pm

Please see the bug cross-posted to GitHub for followup.

uncleremus · May 30, 2022, 6:23pm

SOLUTION: unset the environment variable SDL_AUDIODRIVER on openSUSE before running shotcut, or comment out the line setting it in /etc/profile.d/pulseaudio.sh. See also openSUSE bug 1189778.