Magic Lantern Forum

Using Magic Lantern => General Help Q&A => Topic started by: favvomannen on October 23, 2012, 09:53:16 AM

Title: theoretical example
Post by: favvomannen on October 23, 2012, 09:53:16 AM
If you were to record 720p with 60frames per second and the shutter fps override to 1/12 and then in post use slowmo to get normal speed but great more f stops.

can 60fps really be recorded i720 with fps override?
Title: Re: theoretical example
Post by: favvomannen on October 24, 2012, 09:48:32 AM
Bump.

Could somebody confirm that 60p720 with shutterspeed override 1/12 will look the same (when slowed down)

as 24p720 but with better light?


is that possible with ML? (no sound though)
Title: Re: theoretical example
Post by: nanomad on October 24, 2012, 10:51:07 AM
I've got no 720p 60fps here, but why don't you try it yourself?
Title: Re: theoretical example
Post by: ilguercio on October 24, 2012, 01:05:46 PM
Quote from: favvomannen on October 24, 2012, 09:48:32 AM
Bump.

Could somebody confirm that 60p720 with shutterspeed override 1/12 will look the same (when slowed down)

as 24p720 but with better light?


is that possible with ML? (no sound though)
How can you shoot 60 fps with 1/12s shutter?
???
Title: Re: theoretical example
Post by: favvomannen on October 24, 2012, 01:25:14 PM
she shutter and the recorded frame is two different things. Theoretically with 1/12 shutter it should be very bright and blurry (much motion blur) but recorded with 60frames per second.

if this is not achivable 720 60frames per second and shutter override to 1 /12 then its my misstake.

When i tried it it it was no difference than 72024p and 1/12 (shutter override)
Title: Re: theoretical example
Post by: ilguercio on October 24, 2012, 01:44:36 PM
Quote from: favvomannen on October 24, 2012, 01:25:14 PM
she shutter and the recorded frame is two different things. Theoretically with 1/12 shutter it should be very bright and blurry (much motion blur) but recorded with 60frames per second.

if this is not achivable 720 60frames per second and shutter override to 1 /12 then its my misstake.

When i tried it it it was no difference than 72024p and 1/12 (shutter override)
It's maths.
60 fps means that shutter speed has to be at least 1/60 or faster.
1/60*60=1 (second)
I don't see how you can expose a frame for 1/12s without having less frames (12 fps) .
Title: Re: theoretical example
Post by: Shizuka on October 24, 2012, 02:32:31 PM
Quote from: favvomannen on October 23, 2012, 09:53:16 AM
If you were to record 720p with 60frames per second and the shutter fps override to 1/12 and then in post use slowmo to get normal speed but great more f stops.

can 60fps really be recorded i720 with fps override?

Just take 1/60 frames with 720p60 and do a five-frame temporal average. Easy to do in AVISynth.
Title: Re: theoretical example
Post by: favvomannen on October 24, 2012, 03:08:23 PM
i ment. what you see in viewfinder when 1/12 shutter speed should be able to record that i n 60p?
or that dont wokr?
Title: Re: theoretical example
Post by: nanomad on October 24, 2012, 03:33:47 PM
Again: try that by yourself, it's easy to do