Performance issues with multiple tracks

[Brett Alton]

OpenShot 1.2.2 (and 1.3.0~alpha1), Ubuntu 10.10

When I create a multi-track OpenShot project, and try to preview the video, if I have any more than one video running at the same time (different videos on multiple tracks), the preview slows to a crawl. It gets worse and worse with every video/track I add.

Adding titles, effects, music on top of video (some of which cross over each other) slows OpenShot down so slow when previewing that it becomes impossible to edit/review.

The preview, including jogging, needs to run at real time, else I can't see how certain effects, transitions, sound edits, etc. work and makes OpenShot therefore unusable.

[Andy Finch (fincha)]

Can you provide some details of the type of video files you are using? For what it's worth, I don't have these problems running a 3 or 4 track project.

[Brett Alton (brett-alton-deactivatedaccount)]

720p @ 60fps and 1080p @ 30fps H.264/Linear PCM .mov files generated by the Canon Rebel T2i/550d/Kiss x4.

[madpentiste (antoine-messiah)]

See my posting #4 on https://bugs.launchpad.net/openshot/+bug/595538 (bug 595538 is an issue very similar to this one).