Yes you're right. You have to put a number from the range 0 to 999 afterwards of the delay-option, like this example:
-delay=123
I'll think it will be a hard way to find out the right value of delay, because you have to check the new converted video again and again in your mp4 ...
-speed=0.96
... could be entered from 1 to Zero in Steps of 0.04 - but the result may sound horrible.
|