Has anyone found a solution to this yet? I’m having the same problem. The only two assets my video has is a single-shot phone camera video with muted audio and a separate .wav file overlaid onto it. The audio track starts directly at 0:00 but the crackle happens about a half second after the video start, and I’ve also confirmed that the crackle doesn’t happen in the original audio.
I’m exporting using the “H.264 High Profile” setting, the only change being that parallel processing is disabled.
19.02.28, looks like that should be the newest version. However I did have an older version when I first created the .mlt project file, so I don’t know whether it’s maybe something to do with the way the file was created with the older version.