[Joe Lukus]

I’m pretty sure it is any time the FPS of a clip differs from the the timelines FPS: https://larryjordan.com/articles/fcp-x-conform-different-video-frame-rates/

Well I guess I’m the only that really has this problem, or looks at it this closely…

[Joe Lukus]

Ok guys I have been wondering this lately, still related to this topic.

In simple terms what FPS/camera settings do they film at to capture fast motion like a car going fast with fast pans etc or “in the car view” of it racing down the road with the landscape flying by (think of drone flying through the air fast). Just “fast motion”/speeding up in general.
Because they output at 24fps, so how are they filming fast motion/creating fast motion to get a nice and smooth “fast motion”?
Because if you speed up 24fps in post it can make for stuttering etc… (taking out frames) and if you physically move the camera fast as in panning fast etc.. at 24fps it leads to choppiness, so again how can they record fast motion or speed up the video without jitteriness…
Do they film at like 8FPS and dump in 24FPS which would speed up, but then again you are not capturing all the motion that goes by, again leading to choppiness? or do they film with high frame rates to capture all the motion, but then when they drop it into a 24fps timeline it would be slowed down defeating the purpose! and if they conform and speed it up they are just again tossing away frames to again create a choppy fast motion?

Put another way, how do they simulate “fast motion” on the big screen, scenes that go by quickly (another example, like a video that pans/circles around a building at “normal speed”, but then speeds up as it goes around the building) without making the scene choppy? (One or my reasons for asking the question)

Easy to get smooth slow-mo, just shoot high FPS and then dump into 24FPS timeline, but NO ONE talks about what you do for FAST MOTION?!, and again thats what I want to know!

Hope this all makes sense and you can see were I am coming from?

Thanks!!!

[Joe Lukus]

Perfect thank you very much! That was what I was wondering! IF it created a useable file (prores file) from a selected rendered clip I choose to render off my timeline or it uses its own type of files like you mentioned.

I did find out just a bit ago that if you export a prores file it seemed to render in secs! So I am guessing it used all those little bits of rendered files to use if you export?!

[Joe Lukus]

Hey guys had a quick question which I think should be straight forward..
If I have a source video no matter the format, but lets just say it’s a compressed h.264…
And I want to export it with the hugest quality basic no loss, pretty much just a replication of the same original file with the editing of course… would I choose one of the 8/10bit uncompressed export settings? Because all the other ones would be compressed to some extent correct? And then my next question would be is the uncompressed format a “playback” format that others would be able to use easily?or Is the h.264 really the only “playback” deliverable format that is used?

Thanks guys!

[Joe Lukus]

Thanks guys!!

That’s what I was wondering how to actually creat a Lut! So looks like that Lut generator is what I need… I also saw that I guess you can create them in Lightroom also… but just wasn’t sure if the file extension would work/be the same and carryover like it is suppose with correct colors etc…
But it sounds like that’s how you do it with still pictures and them create a file which I guess is a standard LUT file format that stays constant and works across programs, video and stills…

Thanks our FCPX forum is way better than the others! Lol
You guys the best!

[Joe Lukus]

Thats the thing I am not even watching it on a true 4K but can tell the different! I would think you have to be crazy not to see! the title I am using is a wood grain and on 4k you can see all the detail with the 1080 the grain really blurs together not any were sharp!!!
Now I just got a free compressor like handbook and bumped up the encoding quality and sure enough yep it is starting to get better! so that lets me know if you want better quality outputs you don’t want to depend on final cut pro outputs!!
Looks like I am going to be looking into apple compressor a bit more before pulling the trigger!

[Joe Lukus]

Well I can tell the difference like day and night!!! just think back to yourself the progression of video resolution/quality VHS…DVD digital… 720… 1080…4k…. could you tell a difference heck ya!!! its funny how when you start watching the new and improved “HD” and then go back to the earlier “HD” how much you can tell, well at least me!!

This is why I was wondering if I am doing something wrong because the downscaled 1080 from 4k is so much worse! I have been reading how everyone says when downscaling from a higher res you actually will get a good output with sharper edges etc because you have so much more info to downsample from!!

my 4K to 1080 looks so much more washed out/not as sharp!!! don’t like it at all! is it is because I am so use to seeing all this great detail and sharpness and the 1080 is just that much more less resolution?
I have been researching and will apple compressor give me a better output? anyone using that instead? It sounds like everyone is just doing it the way I am, but man I am not happy with the results!! Is apple compressor my answer!?
Will I be able to improve my output quality significantly? I guess apple just has a preset it uses from the compressor software, is that preset set low??

[Joe Lukus]

I guess it would be simplest to put it this way…
When not using automatic speed in FCPX which keeps all the frames and just slows or speeds them up depending on timeline FPS…

If I were not to use automatic speed and just let FCPX match the timline FPS by rate conform (floor, blend, optical flow…) as it ether starts to drop frames or make up frames….
And say I shoot in 60fps would placing that in a 30fps be better, look better since it will just drop every other frame, than if I placed it in a true 24FPS or even worse 23.987… as it is now not a nice 1 frame drop?

Larry talks about this a bit in one of his articles and show how conforming 60fps to a 24fps can make for not the best convertion as it drops 1 frame then 3 frames etc…: https://larryjordan.com/articles/frame-rates-are-tricky-beasts/

So again was wondering if maybe keeping just even number frame rates are the best when having to mix different frame rates at times? Or will the notice not be that big of a difference and I just need to stop worrying about this lol?

Thanks again for your help!!! I really do appreciate it!!! Enjoy learning this art, but there is a lot to it!!! Lol

[Joe Lukus]

I was going to make another thread but hopefully someone will see this… still on the topic of speeding up/down video…

So I was reading somewhere were they were talking about matching frame rates so that when you are over cranking or undercracking, you want to pick rates that evenly go into each other or divisible? I think it was saying… wish I could find the page!
Because with frame rates of 23.976… but I I can see with 30 frame and 60 etc…

Can anyone elaborate?
Does this have any impact on choosing a frame to shoot at when match your timeline fps?

Thanks!

[Joe Lukus]

Hmm never thought about doing that to slow it down, to give it a nice smoother slower feel!
Thanks again for all your help!