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View Full Version : Slow or Quick Motion?



stanw
07-31-2007, 01:15 PM
Is there any reason to record video in slow or quick motion on the HVX, rather than doing it somehow while editing in Final Cut Pro?


Thanks.

Daniel J
07-31-2007, 01:23 PM
If you use slow motion in regular NTSC 60 interlaced framed footage then the computer will "invent" the frames that will be necessary to play at a slower speed. One of the major reasons the HVX is so popular is that you can control to a large extent how many frames are recorded each second. This means the computer won't "invent" the frames later. You should read this:

http://www.dvxuser.com/articles/framerates/

Daniel J
07-31-2007, 01:23 PM
"won't "invent" the frames later...." depending on which speed setting you have it play at of course.

Benjamin18
07-31-2007, 10:33 PM
That depends.... there's benefits with each way.

for example.... let's say you're shooting for your final output to be in 720/30p.

You wanna do 50% slowmo... But not by shooting 30p and slowing it down in post. Because that would leave you with 15 fps. which would suck.

Anyways, you have two real options:

1) 720/30pN, in the scene file settings go to 60 fps. This will record at 60 fps, but will save the frames into a 30 fps file that's twice as long. This way, you have instant slowmo playback, and you don't have to fiddle at all. Drop the clip into your NLE and it's already slowed. Downside: NO SOUND.

2) Shoot 720/60p. Just shoot your stuff like this, I recommend it. You'll play it back on the HVX, and it won't be slow mo yet, that's the downside. All you have to do is drop it into your 30p timeline, and slow it down to 50%. You now have the same crisp slowmo as option one, but WITH SOUND.

So. To wrap it up.

Option one is quick and easy, and you can see the results straight away in camera... but you don't get sound.

Option two is almost as quick and easy, and you DO get sound. BUT, you can't see the result until you edit.

I'm sure there are other differences between the two, but these are the most relevant to me.