Black lines in video - FYI - solution found - this is an mp4 issue (not a Storyline problem)

If you are experiencing a black line (or lines) in your videos when exporting .mp4's here is the solution to resolve it. 

I traced the issue back to the mp4 standard that requires the dimensions (both height and width) to be divisible by eight. Exporting/rendering with dimension values that meet this will solve the issue. 

In addition, we have determined that a less limiting method also works. Set the final dimensions to values that are even. If you have a dimension value for the height, width (or both) that is odd, you will get a black line in the export.

I cannot speak for all software that exports .mp4's, but this is true when exporting videos using the Adobe Media encoder.

If you have an .mp4 in Storyline that has a black bar, simple crop the video to remove it. 

Please note, that is it possible to crop a video in Storyline that will result in black bars where there were none before. 

@storylin-staff
Please improve the video and image cropping tool to allow the combined use of number values. The manual method that the tool now uses is extremely frustrating when trying to crop to a specific dimension. It is essentially impossible to control the result. I am aware of the dimension display while dragging the cropping handle, however the result when you let go of your mouse button can easily be slightly (and infuriatingly) uncontrollable.