Have you checked this thread? http://www.suu-design.com/forum/viewtopic.php?f=7&t=275 On the other hand, I have fixed some bugs in upcoming version of VTM. Maybe your issue is related to some of them. So please wait for the new release. I have checked that thread but didn't find anything helpfu...

Love the program but I've been having issues with most of my HEVC (x265) videos. The issues are, either the files fails (Red X) or I get an output of 1x1 (for the separate images). With 1x1 issue the last image is fine (the tiled composite of all the images). For the issue with videos that straight ...