Help with SLOW MOTION Hockey video ???

S

Solomojo

Well-known member
I'm trying to get the slowest, cleanest video of a hockey player shooting a puck. I need to show how the stick bends, where the puck is hit, etc. Does anyone know the best setting...60fps, 30fps, shutterspeed ? to achieve this? Any help would be wonderful. Ahoj.
 
how do you get 60fps with a DVX?

You'll want to use 60i. There have been a bunch of posts on this. Search for slow motion or slow mo.
 
Set the shutter speed to as fast as you can.
60i (regular video such as F1) will capture the most images in a given time but it will be interlaced (see odd/even lines). 30p will capture the cleanest still images.
If you're more concerned about seeing every step of motion shoot 60i and deinterlace in post (make 1 full video frame for every field)
Run some tests ahead of time.
 
wouldn't it work if you did 30p and then slowed it down in after effects?

i would have thought the progressive scan would be a must to get the clear picture of the movement? would deinterlacing really be good enough?

my wife is a team doctor for a local college's hockey team and i'll have to see if i can get someone to do a bunch of shots and i'll shoot it in all the various settings.

this sounds like an interesting experiment and i have too much time on my hands.

matthew
 
You can slow the images down but you still only have 30 frames of the original in a second instead of 60. You can get higher vertical resolution at 30p or you can get more images in a given time at 60i. If the stick hits the puck out of frame in less than 1/30 second then you'll have a sharp frame of nothing. As mentioned the best thing to do is to shoot some tests and see which tradeoff provides what you ultimately need.
 
i understand that part but its been so long since i worked with interlaced, are the tools good enough at piecing it back together?

matthew
 
Yes, you shouldn't have any problems re-interlacing depend on the software. I use Commotion which allows doubling fields or interpolating. In this case though since you want to slow it down the de-interlace provides 2x slowdown without ghosting images if the software provides 1 frame per field conversion.
 
As mentioned above, you want to shoot 60i so that you capture the most information per second. Then play around with the shutter speed. Try 120, 250, etc.. and see which works out the best.

I have captured sports action shots at 24 and 30 fps and tried to slow them down but the results aren't as good as 60i. Having more frames makes up for the loss in resolution from deinterlacing the 60i.
 
i'm dying to try this just for academic satisfaction, the local college where i have the connection has already shut down their rink so i'll have to do it next year.

btw, the women's olympic hockey team just beat canada! my wife just called me from sweden to tell me. she's been with the team for two weeks over there.

matthew
 
You should be able to do it in post with the right program. I do Clay Target Shooting & used my camera to do some coaching shots. Slowed it down in post, can't remember how much, played with it until I got the effect I wanted. You can track the shot charge to the target at 1250 feet/second. I edit with EDIUS 2.5.
 
crazyczech said:
I'm trying to get the slowest, cleanest video of a hockey player shooting a puck. I need to show how the stick bends, where the puck is hit, etc. Does anyone know the best setting...60fps, 30fps, shutterspeed ? to achieve this? Any help would be wonderful. Ahoj.
Click to expand...
Ahoj Vasku!

I'd say - do some tests with 60i as folks have suggested. However, I am afraid that the action of a hockey stick hitting the puck is much too fast to record what you are looking for. Even for a modest estimate of a puck flying at 100km/h (about 60mph), you are looking at about 46cm the puck travels per single field in a 60i. That's more than a foot and a half! Even if you take into the account the acceleration of the puck from zero to that speed, you most likely won't be able to record the precise point of the stick hitting the puck.

You could instruct the player to hit the puck slower, but I don't know if that would give you the bending effect you are after.

I'd say, you need a high-speed camera, probably something like 250fps. Not cheap....

Sorry if my response is disappointing...
 
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