I have managed to make OpenShot more stable under Linux.

In a previous blog posting, I had reported that OpenShot was dangerously unstable, and even unstable under its native Linux. I’m basing this on OpenShot 1.4.3, installed from the package manager under Debian / Jessie, with a KDE 4.14 desktop.

This Was The Posting.

It turns out that there can be ways to overcome this instability.

Firstly, I have changed the Output Mode, with which this application renders its previews, from “sdl” to “sdl_preview“.

More importantly there seems to be a detail in its practical use, which I was unaware of before. Earlier, I had imported a captured .OGG / .OGV file into its video clip resources. In itself this presents a problem, in that certain .OGV Theora files, especially ones produced by screen capture, are known to give this program problems. This can be anticipated, by the video clips in question having blank thumbnails.

On the first try, I told OpenShot to play the video clip anyway in its preview window. The progress bar went from the beginning to the end at the correct speed, but once it reached the end, the application became unresponsive and KDE had to shut it down forcibly. This was with the Output Mode still set to “sdl“.

Apparently, once OpenShot has crashed, it has saved corrupted information into the folder ‘~/.openshot‘ . Had I known this, I could have deleted that folder completely before trying out the application again. But instead I tried to use OpenShot again right away, sometimes telling it to play the .MP4 version of the same video or other clips.

That was when my desktop froze. The X-server did not crash, but no movement or mouse input could be given anywhere on the desktop. The actual mouse pointer was still moving in response to the mouse however, and it was also changing from the usual pointer, to the special pointer when hovering over the preview panel. I needed to use <Ctrl>+<Alt>+F1 in order to open a Virtual Terminal in text mode, and then to ‘kill -9‘ the actual application pinning the other virtual terminal.

My setups typically allow for multiple sessions to be logged in at once, and Virtual Terminals 1-6 are text-based, while the graphical ones start from Virtual Terminal 7. So once the offending processes were killed, I was able to <Ctrl>+<Alt>+F7 back into the graphical session, which was not corrupted.

But the way I finally broke this spell with OpenShot, was to delete the directory ‘~/.openshot‘ and its corrupted contents. After that, the application was able to play the .MP4 video clips fine, which also had thumbnails that corresponded to their content.

Also, if I decide that a user-space configuration is needed to ensure the stability of the system, I copy the contents of the configuration folder for one application, into ‘/etc/skel‘, from where a skeleton of starting files is copied, every time the home directory of a new user is set up. That way, any newly-installed user will inherit my recommended settings.

In order to do that, after I deleted the config folder once, I only launch the application briefly, and make my configuration settings, before exiting the application again immediately. At that point I feel that the config folder is in its correct state, to be copied to ‘/etc/skel‘ .

There are certain purposes, which OpenShot may be better able to suit than alternatives, simply because OpenShot has more features.

Dirk

 

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