What effects does mixing different frame rates and shutter speeds do?

[analogs]

From my understanding, if you do not use the 180 degree rule and use a faster shutter speed, your footage would produce a sort of crispier look in regards to the motion. As though you are seeing the motion clearly, like fast robotic movements. If you were to slow down your shutter speed based on the 180 degree rule, the motion would start to look mushy.

If you were to follow the 180 degree rule on a 50 fps footage and use it on a 30 or 24 fps timeline, what effect does this do? Does it produce the same quality footage as if it were on a 50 fps timeline or does it change it somehow and if so, what sort of changes?

What sort of effects happens when you exceed the 180 degree rule and use a different fps to what it was originally recorded.

What happens to the image - quality, motion, etc. Does it create noise, how does it affect the blur or crispiness of movement, color, etc.

What sort of affects happen when you use the 4K footage on a 1080 timeline with the above situations?

Is there a guideline as to how these sorts of situations work?

Thanks.

 

[combatentropy]

When filmmakers say "The 180-Degree Rule," they mean something totally different. It's about camera placement: https://en.wikipedia.org/wiki/180-degree_rule

But that's not what you're asking.

Is there a guideline as to how these sorts of situations work?

Yes, the guideline is, always shoot with a 180-degree shutter for normal-looking motion, even if it will eventually be slow-motion. For example, if you're shooting at 48 fps but playing back at 24, you still would normally use a 180-degree shutter, which is 1/96 second.

What sort of affects happen when you use the 4K footage on a 1080 timeline with the above situations?

The same rule applies.

 

[Rainer]

When filmmakers say "The 180-Degree Rule," they mean something totally different.

There was a "180 degree" shutter rule back in film days, when film camera typically used used simple rotary shutters. The rule referred to the fact that you could not have a greater than 180 degree shutter without double exposing part of your frame. It was the theoretical maximum, important in the days when 40 ASA was the maximum. In fact no rotary film camera of that era used a 180 degree shuttter, not even Arri, which may have claimed to. The application of that "rule' went out the window with video, which generally allows up to 360 degrees, and more in some Red models. However, for many amateurs and even some professional videographers the misunderstood "180 degree rule" has become gospel. Not a big problem, since it's a reasonable guideline or rule of thumb in most situations. Does fall apart in situations where it compromises the result - basically, light usually is more important than motion.

 

[legrevedotcom]

In regards to the framerate... the footage doesn't care what you shot at. But your editing program will determine the lenght of your clip based on your timeline settings. As suchs you could place a 50fps clip on a 25fps timeline, and the result would slowmo. If you placed the 50fps on a 50fps timeline it would be realtime, but might appear crispier than a 25fps clip on a 25fps timeline.

In regards to the individual frames, think of them as a sequence of photographs. The only thing affecting them is your shutterspeed / shutter angle, aperture and lighting. FPs will indirectly effect the frames, but only because you set your exposure accordingly (or don't...)

As for 4K vs 1080p... doesn't matter. But your 4K footage might look a wee bit nicer on a 1080p timeline than 1080p footage.

 

[analogs]

Thanks for the reply. I have started experimenting with the 30fps and 60fps and I have noticed lights flickering in the footage.

I may have to stick to 25/50/100 frame rates since this may be the cause of the flickering.