Hi,

I wonder if anyone can shed some light on a problem I'm experiencing with Kdenlive.

I have added a couple of clips (1080p50 XVid) to a project, and each of them play fine in the Clip Monitor. I want to add these clips to the timeline and add the Dissolve transition between them.

I have achieved the above and when I click on the Play button on the Project Monitor, I can see the project playing including the transition. All fine so far.

After this first play of my new project, I have tried to move the playback position bar and once I do so, the project monitor goes black. From this point on, I cannot see my project playing whether I start playback from the beginning or from an arbitrary mid-point. I may see a flicker of an image, and the transition effect may appear but that is it until I quit Kdenlive and start again.

I'm stumped as to what could cause this. I did wonder if it was because I was using onboard graphics, but I have upgraded that element of the computer today with no change in the result.

Computer specifications are as follows:

* Ubuntu 10.04LTS Lucid Lynx
* Intel E3200 Dual Core Celeron 2.4GHz
* 1GB DDR2 800MHz RAM
* MSI NVidia 8400GS 512MB Graphics Card

I know the machine doesn't have the highest specification in the world, and perhaps more RAM is needed for this job. I don't believe this to be the causing factor in this problem though considering playback is initially achieved.

Following a search of the internet, I've attempted two possible ways of resolving this: disabling Compiz, starting Kdenlive from the terminal using 'env XLIB_SKIP_ARGB_VISUALS=1 kdenlive' and running the Config Wizard. Neither has given the resolution.

If anyone is able to pose a potential solution, I'd be ever-so grateful. I have video clips of a wedding which I'd love to put together into a nice package for a DVD perhaps. This problem is putting that project on indefinite hold.

Thanks!

Maybe choosing another video driver helps (Settings -> Configure Kdenlive -> Playback).