Re: Error in AppImage only

[Benoît Minisini <benoit.minisini@xxxxxxxxxxxxxxxx>]

Le 07/01/2026 à 16:47, Claus Dietrich a écrit :
> Hi
>
> I prepared the attached demo app, which displays the USB webcam for 
> special purposes (webcam device /dev/video0 may have to be adapted on 
> other platforms).  It works well during development und runtime time, 
> but when I prepare an AppImage the app fails and raises an error:
>
> $ ./MediaControl_Bug_Demo-0.0.1-x86_64.AppImage
> gbr3: error: FMain.Form_Open.22: Unknown control type
>
> Stack backtrace
> ------------------------------------------------------------------------
>     1: FMain.Form_Open.22
>     2: -
> ------------------------------------------------------------------------
>
> What could be the reason?
>
> Best regards
>
> Claus

"Unknown control type" is a 'gb.media' error message. It means that the 
GStreamer library inside the appimage do not know the GStreamer element 
type you want to use, i.e. that a GStreamer library is missing.

Regards,

--
Benoît Minisini.