How to slow down a video

Question

How to slow down a video

I have a .mov file that is 120 seconds long at 25 fps. I would like to make it 40 seconds long and it is okay if I slow down the frame rate to do so. I can slow down the playbackspeed to 1/2 speed using the A/V settings however, this does not permanantly change the speed. I need to be able to save it as a new file type at the slower speed. Is this possible using QT Pro or iMovie or anything else. My next step will probably be using VLC.

Thanks for any help

2.4 MacBook Pro, 2.0 G5, Mac OS X (10.5.1)

Posted on Apr 4, 2008 7:52 PM

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Answer 1

Apr 5, 2008 10:27 AM in response to Benjamin Berfield1

Download QT synch, you can just type in a new frame rate and save a s a self contained movie.

Cheers

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Answer 2

fflynn

Level 3

520 points

Apr 6, 2008 12:18 AM in response to The Dougfather

You can also slow down a video in VLC. The "playback" pull down gives you the options of "slower" and "faster".

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Answer 3

Apr 6, 2008 4:35 AM in response to Benjamin Berfield1

120 seconds to a 40 second file means you're speeding the file up (25 to 75 fps).
The human eye really can't even register much above 60 fps and older machines couldn't play every frame anyway.
Easiest method using QuickTime Pro would simply require you to add (scaled) your video track to a 40 seconds audio track. Open the Movie Properties windows and "Extract" this new video track and Save As to make a new file.

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