Andrew, here is the result of analysis: But attempt at editing this file with Cin-GG (from July 1 2019 + ffmpeg
git) resulted in Cin process eating a lot of CPU and only showing and playing first minute or so.
Using the attached script, gg was able to verify that the bandicam...mp4 file has only a single keyframe and to quote from previous information -- "Generally it just does not have keyframes which are needed for seeking which is what is done when you move around the media and start playing in the middle". Except in this case it already hangs using 1 thread to build the index because of no keyframes.
Bottom line is that Cinelerra will never be able to handle this file. He is going to add a message to the code to at least notify the user so as to not hang leading to frustration.