4k 60 fps to 24 fps stuttering no matter what - X-T4

[azura_404]

Hello,

I shot few clips to try out my new Fuji X-T4 in 59,96 fps with a shutter speed at 120, codec H265, 200Mbs. It's not an IBIS issue, it was OFF.

When I play the footage straight out of the camera (so MOV file at 59,96 fps in 4K), it works fine but no matter what I do in Premiere, it's stuttering in the software and in the exported video as soon as I slow mo the footage.

It's mostly when panning and moving. If I put the camera on a tripod, filming people passing by, it seems to work fine when in slow mo...

I use this method :

Import footage in Premiere, changing sequence settings to 23,976 fps, make speed duration at 40%. As soon as I do that my footage will be choppy in Premiere and in the exported file as well. (I tried h264HD, h265 4k... same issue)

I also tried :

Import footage in Premiere, changing sequence settings to 23,976 fps, modify clip, interprate footage, assume this frame rate is 24 fps... same issue.

Any idea why?

Thanks a lot,

best,

 

[Mczar2u]

Hopefully someone who know about video can help you, but my guess is that the ratio you are changing the frames per second is off, and the software needs to jump every few frames to synchronize?, and may be less noticeable with the camera fixed.

Mario

 

[SeeNoSun]

Hello,

I shot few clips to try out my new Fuji X-T4 in 59,96 fps with a shutter speed at 120, codec H265, 200Mbs. It's not an IBIS issue, it was OFF.

When I play the footage straight out of the camera (so MOV file at 59,96 fps in 4K), it works fine but no matter what I do in Premiere, it's stuttering in the software and in the exported video as soon as I slow mo the footage.

It's mostly when panning and moving. If I put the camera on a tripod, filming people passing by, it seems to work fine when in slow mo...

I use this method :

Import footage in Premiere, changing sequence settings to 23,976 fps, make speed duration at 40%. As soon as I do that my footage will be choppy in Premiere and in the exported file as well. (I tried h264HD, h265 4k... same issue)

I also tried :

Import footage in Premiere, changing sequence settings to 23,976 fps, modify clip, interprate footage, assume this frame rate is 24 fps... same issue.

Any idea why?

Thanks a lot,

best,

Try changing the sequence settings to 30p in premier and don't change the speed duration (or try 50% which is an even number). My guess is that 59.96 to 24p with a 40% speed might be the issue. I'm not an expert but it is worth a try and might solve the problem.

 

[Justin Cider]

There's only a couple things it could be. Let's run a quick test though. Start a new project, drag in one of your 60fps clips and let premiere set the project settings the same as the clip, aka 60fps. Now go to export and set the export to the generic 4k YouTube setting and make sure the export is same as project, once again 60fps. After export bring that new clip into a 24fps timeline like you have been trying and slow it down. Did that fix it?

 

[NottsPhoto]

Previous responses in regards to the fact you need to go down by 50% to 30fps are correct.... 24 does not go into 60... you end up with missed frames and you get stutter.



if you want a result that is closer to 24fps, shoot it in pal at 50 and go to 25.



we shoot all of our material at 50fps except interviews... and all of it is brought down to 25.

works fine.

 

[Image Of TIme]

Ok so i know your problem right off the bat.

So your recording at 60p and then when you put it in premier pro, your Sequence settings are in the same frame rate as the video Correct?
Then Your Just rendering it out, to a 24p or 30p video Correct?
there is your problem right there..
You can't record in 60p and then export it to a lower fps setting such as 24 of 30 p video.
Because what premier has to do is lets say you exported it out to 30p
What premier pro is doing is exporting to 30p and in order to do that from a original 60p video it has to drop half the frames, so every other frame is dropped.
There is your jidder/studdering..

If you record in 60p you have to export it to the 60p the same frame rate or it will have problems.

shooting a 60p to be exported to a 30p video, is for creating slow-motion sequences.

So therefor your telling premier pro to slow it down to lets say 50% and therefor that would be in sync to a 30p video that is exported and would be smooth.

Only Shoot 60p if your going to export it as a 60p video or if your going to slow it down at around to 50% ..

Other then that if your intending to export your video to a 30p video then shoot it at 30p.

Shooting at 30p and then exporting to 24p is not going to have much of a problem, but shooting at 60p then exporting to 30p is a huge difference.

And it has to drop half the frames, and when it does that your going to get studders, it's going to look like you shot it in 30p and then slowed it down by 50% .

Try slowing down the footage to 50% and see what it looks like when you export it to 30p, or just export it to 60p and see what it looks like i bet you the jitters and studders will be gone..
Donny