Comment 1 for bug 1486750

I've tried your file on a manjaro installed by pacman and no problem. Tested with the preview and on the timeline with the player.

FFmpeg is an external dependencie.

I suspect that you don't have the good version of ffmpeg. Try this faq : https://answers.launchpad.net/openshot/+faq/983
You should try this one too for knowing if the problem comes from ffmpeg or mlt : https://answers.launchpad.net/openshot/+faq/1040