Making 720/60p look good in a 23.976 timeline

[danielisaiah]

Hey all,

I was wondering if any of you here on the Vegas threads can help me out. I'm struggling to make 720 / 60p footage look good in a 23.976 time frame. It's absolutely driving me nuts. What I'm looking for is smooth motion blur and smooth film like movement like all the other GH1 users seem to be getting with their camera at 720p. what im getting is frame stuttering throughout all my videos...especially when there is latteral or vertical movement (such as pans)

Take a look at this thread. This user is shooting a at 720/60p using a GH1 and it looks great! I dont know what this person is using as an NLE though.

http://www.dvxuser.com/V6/showthread.php?t=187661

below is some footage that I shot last night. I shot everything here at 60fps using a 50 shutter speed. I just drop that into my 23.976 timeline and edit. Is this the wrong thing to do? I'm told that using a 50 shutter looks good in this timeline because my final output is basically 24fps and thats as close as I can get to a 180 degree shutter.

Notice how the the below video stutters and jumps...it looks the worst from 1:57 to 2:48 (please ignore the effects.....this was a test of vegas effects rendering)



Is there some sort of pulldown removal that I should be doing?

Im using Vegas pro 9b
I have turned off de-interlacing in the global properties
I have also disabled resample is all the clips

Any help would be greatly appreciated.....and thanks for any replies in advance!

 

[Barry_Green]

I shot everything here at 60fps using a 50 shutter speed.

That's your problem right there. You cannot shoot 60fps video at 1/50. It's physically impossible. So when you choose a shutter speed lower than 1/60, the camera starts frame-doubling.

In effect, what you did is shoot 720/30p. You didn't intend to, I know, but that's what the camera did to you because you put it in an impossible situation, so it took the only way out it could, frame-doubling.

Try your test again using 1/60 shutter speed and you should see vast improvements.

 

[danielisaiah]

That's your problem right there. You cannot shoot 60fps video at 1/50. It's physically impossible. So when you choose a shutter speed lower than 1/60, the camera starts frame-doubling.

In effect, what you did is shoot 720/30p. You didn't intend to, I know, but that's what the camera did to you because you put it in an impossible situation, so it took the only way out it could, frame-doubling.

Try your test again using 1/60 shutter speed and you should see vast improvements.

Try your test again using 1/60 shutter speed and you should see vast improvements.

CRAP! I knew I was doing something wrong.

So is the below correct for best results in a 24fps timeline?:

1080p 24fps shutter speed = 50 (for good looking 24 fps motion)
720p / 60fps shutter speed = 60 (for good looking 24 fps motion)
720 /60fps shutter speed = 125 (for SLOW motion in a 24 fps timeline when slowed to .4 of original speed)

 

[Barry_Green]

Yes, but there's a further complication, which is if you want to shoot under fluorescent lights or HMIs or sodium vapors or any of those kind of lights, you should just use 1/60 instead of 1/50. 1/50 can cause scrolling waves throughout your footage when using a CMOS sensor.