Hi, changing to the classic cinelerra engine did not solve the problem. The error occurs again if I do not change the frame rate of the source media f...

Oh, I remember, I've read this chapter in the manual before but did not check this yet. So thank you for this hint! I'll give it a try and will report...

Thank you very much for your reply! 1. I'll stay with the described procedure to handle those clips with the high frame rates, as it is the establishe...