Export project as video hangs

[Ray DeCampo]

Ubuntu 12.04:
Linux stingray 3.2.0-32-generic-pae #51-Ubuntu SMP Wed Sep 26 21:54:23 UTC 2012 i686 athlon i386 GNU/Linux

Openshot 1.4.3-1 (installed via PPA)
melt 0.7.6+git20120204-2

I was able to use OpenShot to create a project (although as the project grew it became temporarily unresponsive at times and would crash here and there) about 3:30 minutes in length. When I attempt to export the project as a video file (MP4 with h.264 (I always forget the proper number)) OpenShot works for a while, seems to get about 20% through and then hangs.

When I examine the process in the System Monitor, the Status is 'Sleeping' and the Waiting Channel is 'futex_wait_queue_me'.

[Ray DeCampo (rdecampo)]

I tried exporting an old project I had and that was successful. I am attaching the troublesome project since it seems to be specific to something in there. In terms of major differences between the two, this one is longer, makes use of transitions, makes use of 6 tracks vs 2.

[Ray DeCampo (rdecampo)]

I did some more troubleshooting and determined that the issue was that the process was running out of memory. I switched to a 64-bit system and I was able to successfully export the video. I will leave it to the project leads to decide if this is a bug or not.

[Andy Finch (fincha)]

If you are editing large HD files, then you will need a large amount of RAM. OpenShot itself doesn't manage the rendering process - that gets passed off to MLT & the FFMpeg libraries.

We will be able to manage exceptions from the underlying libraries in the future, but with our current framework we can't fix this.

[Killozap (machma-lalla)]

In my case this has nothing to do with RAM. My RAM is not used half, but the calculation does not run, it stops at the beginning about zero to two percent, depending on the project.

On the lower right you can see processor at almost full throttle (blue graphic) and RAM almost untouched (green graphic).