I am using MovieStudio 17 Platinum. I have mpeg2 video files that have been captured from VHS tape. I import them into the timeline and they play correctly in the preview window, with the video and audio in sync. However, if I try to render the project to ANY other video format (including mpeg2) I get an issue with the audio sync. It seems that the render operation is 'seeing' all of the audio track but is missing odd parts of the video track. This means that the audio gets further and further behind the video the longer a render I do. I have tried rendering shorter loop regions and some work and others have the issue described above.

I know the video is missing parts because if I render a loop region I actually get more of the original video in the rendered video than where the loop region stops. The program is adding enough extra video outside the loop region to make up for the frames it has not rendered, until it reaches the correct end of the audio track.

My system has a Core-i7 3770 cpu, 16GB RAM, NVIDIA GeForce GTX 650 TI graphics card and is running Windows 10 Pro 1903, 64 bit.I have disabled GPU rendering in MovieStudio as it caused the program to continually crash. I see exactly the same issue if I go back to MovieStudio 13. I have never had this issue when dealing with video files imported from my Panasonic camcorder.