encoder audio

Is it possible to convert ms to qt duration?

milliseconds-to-qt-duration

Yes, provided you know the timescale of the movie. (The timescale an attribute of the movie, and can be anything; it's not a fixed unit of value for all movies.) For example, if the timescale is 600, then one unit is 1000/600=1.666667 ms.

Haha, I misread your question (I got it backward, time units to ms instead of ms to time units), but I'm sure you've figured out you simply need to invert the process.

Milliseconds to QT Duration