MvdS

Hey Mvds, nothing wrong with the clip you posted, its simply the physics of how fast you can move the camera before seeing the image strobe..

 

I think if you made a scientific test next to the 650d you would see the same..

 

(NTSC = 29.97 fps not 24 btw)

Animanus thanks for you comment...

There is really a difference compared to my 650D footage, that said, there are a handfull of users on the internet/forums experiencing the same... I saw it many, many times before I bring back my GH4 back!
But you make me doubt about my vision because you saying nothing is wrong with the clip.. Is a i7 machine with 8gb ram not fast/good enough for playing C4K?

Btw, I mean 60hz system settings with NTSC instead of 50hz PAL, sorry for that :)

There isn't much panning in your shot and hence not much there to cause juddering.  When I play that clip on a Premiere timeline, it seems just fine to me - and I happen to be one of those guys who dislikes judder and have been critical of the look given by 24fps that so many film makers seem so happy with.  I find it distracting.

My guess is that your display was dropping frames.  What did you use to play back the video?
 

Hi Jay,

Thanks for your comment!
I agree 24p is really different then higher framerate, but for me personnaly I like the 24p look more than higher framerates! IMHO it gives a more ''chique'' look, it depends ofcourse what you shooting. I prefer higher framerates when shooting live (for on big LCD/LED screens for ex. live bands/music) or doing ENG stuff.
Anyway, I noticed alot of judder in the movement of the person and between 20-22 secs of the clip in the left (trampoline?).

I played the video back on VLC and Quicktime (both OSX and Win7 on different computers with i7,SSD and 8GB ram or more) and in Premiere CC in OSX (tried different sequence presets and previews with C4K resolution in ProRes 422)
Even when doing a scaled export (down-scaled C4K in 1080P sequence for final 1080P export) the judder appear.

I also tried to output my HDMI from my computer in 24hz (set the display output to 24hz in OSX) to my Sony HD tv and putting the tv in ''24Hz Cinema mode'', also no difference...

I keep saying the difference is really TO big, comparing it to my Canon 650D in 1080p 24p NTSC.... That said, as a whole seeing this is my first experience with 4K. So maybe it's more normal then how i'm seeing it.

Sorry for my bad English, I'll hope you understand me well!  ^_^  :unsure: 

Greetz for The Netherlands

Hi, i was wondering if anyone is having problems with jitters on the GH4.  I am testing the camera with a 50mm manual Nikon lens and any small movement or panning creates a significant jitter, strobe effect.  I am using 4k at 24p and can't figure out if i am doing something wrong.  If i compare the footage to my Sony FS100 the difference is really noticeable.  I am getting ready to return the camera...  

 

Any feedback greatly appreciated.  Thanks.

Hi hdd,

I also had major problems with my GH4. An unbelievable amount of strobing when shooting 24p, 25p and 30p in 4K or C4K.
I've tried all the possible settings/combinations! Different Hertz, high or low shutter speed, shutter speed angle mode, shutter at 48 with synchro scan and nothing seems to work. (when lowering the shutter, it only got more ''useless'' blur ofcourse)
Even filming with a Steadicam doesn't improve the image at all.
I'm always filming in 1080P 24P NTSC with my Canon 650D because I really like the subtle cinematic ''stutter''-look of 24P, but on the GH4 it's at least 4 times more present, simply way to much for professional use!!.. So I returned my GH4 last week :(..
Check out my C4K footage (directly from the camera) here: 
https://www.wetransfer.com/downloads/3445dbee96a8edd4b8c4bb2eb37e8c9d20140709233049/85d284b92f4d6516154757236559385d20140709233049/a06e27

Cheers