https://bugs.kde.org/show_bug.cgi?id=382735

            Bug ID: 382735
           Summary: Both Clip Monitor Screens and Project Monitor screens
                    are black when playing video
           Product: kdenlive
           Version: Appimage - Refactoring
          Platform: Appimage
                OS: Linux
            Status: UNCONFIRMED
          Severity: critical
          Priority: NOR
         Component: Video Display & Export
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: ---

Created attachment 106867
  --> https://bugs.kde.org/attachment.cgi?id=106867&action=edit
Screenshot of isssue: Project Monitor is paused, but display is black when it
should be showing the video clip in Timeline.

BEHAVIOR
After I import a video clip and left-click it to play in the Clip monitor and
press the "Play" button, the video will play (I can hear the audio, and the
audio levels indicator and position cursor are working), but the screen is
black -- it doesn't display the video. (I'm assuming this has to do with
running proprietary Nvidia graphics drivers; I haven't tested on other
machines).

EXPECTED BEHAVIOR
For playback to show in the Clip and Project monitors as normal.

BUG DISCOVERED USING
Kdenlive Appimage version 17.04.1b-x86_64
Ubuntu GNOME 17.04 x64
GNOME 3.24.2 desktop environment
Linux kernel 4.10.0-28-generic
Nvidia GTX 1080 graphics card
Nvidia 381.22 proprietary drivers
X11 (Xorg) desktop session

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