Bug 382735 - Both Clip Monitor Screens and Project Monitor screens are black when playing video
Summary: Both Clip Monitor Screens and Project Monitor screens are black when playing ...
Status: RESOLVED FIXED
Alias: None
Product: kdenlive
Classification: Applications
Component: Rendering & Export (other bugs)
Version First Reported In: Appimage - Refactoring
Platform: Appimage Linux
: NOR critical
Target Milestone: ---
Assignee: Jean-Baptiste Mardelle
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-07-25 23:26 UTC by Unknown
Modified: 2017-10-18 15:11 UTC (History)
3 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:


Attachments
Screenshot of isssue: Project Monitor is paused, but display is black when it should be showing the video clip in Timeline. (135.45 KB, image/png)
2017-07-25 23:26 UTC, Unknown
Details

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Description Unknown 2017-07-25 23:26:12 UTC
Created attachment 106867 [details]
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
Comment 1 Nobisoft 2017-08-01 10:49:04 UTC
Can second this:
Kdenlive Appimage version 17.04.1b-x86_64
Debian stable
Nvidia GTX 1060
driver 375.66
Comment 2 matthus 2017-08-23 16:19:51 UTC
Hallo,
I have this problem too after update to debian stretch.
Booth 17.04.2-dmo1 (deb-multimedia.org) and 16.12.2-1 (debian/stable) show no video in clipmonitor or projectmonitor.

If I chroot to a debian/jessie on the same computer and use kdenlive 0.9.10-2 from that, the video is O.K. (but sound in chroot is a nother problem :-( )

The hardware is also Nvidia with propritary driver. 
It is possible, the new version need some CPU-features (ssse3 sse4.1 sse3) I don't have?

What can I do?
with regards
Andreas
Comment 3 matthus 2017-08-24 16:23:22 UTC
Hallo,

on the same computer kdenlive 16.12.2-1 works fine with debian stretch in a VirtualBox-machine.

And now I updatet from nvidia 375.39 (from scratch) to nvidida-driver 375.66 (from debian-packge) and all works fine in kdenlive 17.04.2-dmo1.

The problem is solved for me.

with regards
Andreas
Comment 4 Unknown 2017-10-18 15:11:24 UTC
I can confirm, this problem doesn't seem to exist in current builds/release of either the stable appimage or the timeline-refactoring appimage. Nice!

Closing this bug as resolved/fixed.