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[barkman <jbmongo@xxxxxxxxx>]

Thanks Andy.
Does 'apt-get remove openshot' get all of the dependencies?  Do I need to anything to get the default Ubuntu MLT/FFMpeg  packages back in place?  I guess that if Totem or mplayer runs again, the packages are back...

Removing the pid.lock did not help in this case.

-- 
After a clean install, OpenShot hangs on preview, must reinstall to "recover"....
https://bugs.launchpad.net/bugs/489748
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Status in OpenShot Video Editor: New

Bug description:
This may be related to or possibly the same as some other bugs reported, but my symptoms seem more severe; so I opened a new one.

System:
Quad-Core HP with 8G memory
750G Disk;  ATI Radeon HD 3200 Graphics

Clean install of Ubuntu 9.10 64bit  Karmic

Installed OpenShot via PPA
deb http://ppa.launchpad.net/openshot.developers/ppa/ubuntu karmic main
deb-src http://ppa.launchpad.net/openshot.developers/ppa/ubuntu karmic main

- OR- 
Installed OpenShot via DEB

I did NOT try the Source Code Tarball  (...long weekend nearly gone...)

I also tried the binary ATI driver in addition to the default open source ATI driver.

Everything seems to install perfectly.  Trouble occurs after importing a video file and previewing (no scrolling of the preview location bar required).  After a few seconds,  one of the CPU cores goes to 100% and OpenShot is no longer responsive.  Sometimes OpenShot can be closed; often times it must be killed.

Rerunning, OpenShot will open and hang again in a few seconds.

The 1st file I imported was from my Cannon HF200 (.MTS) which was about 2G in size; since that is what I wanted to edit.  I went through this 3 or 4 times with various reinstalls of the OS, OpenShot or both with the results always the same.  Switching video drivers made no difference.

I did not try one of Jonathan's sample files;  I will try that next time I reload from scratch.

The last time I tried a simpler .avi file and got the same results.

I would have tried more variations if it didn't take so long to reload everything from scratch. 

If I remove and re-install,  OpenShot hangs seconds after being opened.
(apt-get remove openshot; apt-get install openshot)

If you can tell me how to get this cleaned up without reinstalling from scratch, I can do more to isolate the problem.

It seems other folks are using OpenShot to actually edit videos; this is amazing to me after my experience.  This has been going on since Wednesday, if you include some Ubuntu weirdness that I had to deal with.

Also,  I ran OpenShot from the command line, but there were no messages printed on the console.  I searched the file system, but could not find any log files that related to OpenShot.