Error "stream is in the wrong format" when seeking or adjusting speed during playback of MP4 file
While trying to play a standard mp4 video file, I tried adjusting the playback speed. Video playback immediately stopped as if paused on the current video frame, and popped up an error dialog box stating: An error occurred \n The stream is in the wrong format. \n OK (button). See attached screenshot.
So I click OK, and I'm able to start playing the video again. It starts over at the beginning, but is playing back at the speed I had selected. I try seeking into the timestamp so I can resume where I left off, but I'm greeted by the same error message. I click OK, and close totem. Reopen and try same video file, as well as testing out on a few different video files, consistently getting the same results each time. I've tested this on webm, mkv, and ogv files as well, but this problem only seems to manifest with mp4 files. Underlying codec issue?
Another note: When I first open and play an mp4 file, I'm able to seek and navigate without any problems during playback, whether using the arrow keys or the mouse on the progress widget. If I then try to change the playback speed, I immediately get the error message. When I start playing back, I am no longer able to freely navigate and jump around in the video playback stream. Each time I do that (after adjusting playback speed), I now get the error message, unless I close totem and reopen the mp4 video anew.
Totem version is totem-3.32.1-1.fc30.x86_64. As far as I can tell, this has not yet been reported in the redhat bugzilla. Thought I'd check here first, but I didn't see any existing issue reports, so here it is.