Suddenly after exiting and coming back to my project the input files are not being decoded properly. As I playback the input, MS displays random frames from various parts of the file. Some sections play properly and then some have random frames inserted. There are also blank frames inserted. The thumbnails display black in some sections.
I tried several other formats and Uncmpressed, x264, and x265 all work.including non lossy X265. Huffman encoding exhibits the same symptoms as Lagarith. When this happened there were no Windows 11 or Movie Studio updates. I have tried uninstalling MS and putting it back. I also checked playback of a file that has problems and it plays perfectly in other programs such as VLC, VirtualDub, and Cyberlink Power Director, so the problem seems to be in MS Platinum 2020. I tried setting various methods of acceleration in Program Setting/Device Options. Nvidia and CPU both have the problem, but it seems to be slightly different for each.
I have a PC with 16Gb memory, Intel processor, and about 1Tb of hard drive free for the project.
As MS does not offer a non-lossy output format other than uncompressed, my use of Lagarith is for being able to do multiple pass editing without any losses or added artifacts. So how do I fix this problem for my massive project with many short segments all in Lagarith codec?