How to force Storyline 360 to publish videos at MP4 and not QT?
We have been dealing with a frustration for a few months now and I'm curious if anyone can explain why or tell me how to "fix it".
When we publish to Web / HTML5 only, and leave quality at default or any setting below 9 (the highest quality and biggest files) the video files are being published as <filename>.mp4.qt which leads to frequent playback problems like the video being stuck on the opening frame for many users while the audio cuts in and out. If I bump the quality setting to 9 then I get <filename>.mp4 files as expected and everything plays back as expect but now the media is about 3x the size.
Before someone tells me it has to convert to QT to keep the size down, I can tell you that if I monitor the file system while publishing, Storyline actually publishes the .mp4 file first and then goes through another very slow conversion step to create the .mp4.qt version of the file and the sizes are almost identical.
If I open the .mp4.qt files locally they play in Quicktime. If I open the project in my web browser (launch story_html5.html) I get the same result my end users are reporting - the video is stuck on the opening frame and the video cuts in and out unpredictably.
The documentation I can find states that all videos are converted to .mp4 when projects are published. Can I turn off the ability to publish in QT and force it to keep all video as MP4?