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Sony a6400 4K video is "stuttery" when panning...


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Hi... I just started experimenting with 4K video shooting with my a6400, having spent a few years just using the HD video settings. I notice that even in the lowest quality 4K video setting (XAVC-S 4K 24P 60M) I get an unpleasant video stuttering effect when I pan the camera from side to side, even if I do this quite slowly. However, in the highest quality HD mode (XAVC-S HD 60P 50M), even fast panning is quite smooth. I don't think this problem is that my computer isn't powerful enough to play 4K video well, as I have a fairly high-end MacBook Pro, and also if I use conversion software to convert 4K video I've taken with the a6400 down to HD resolution, I still see a stuttery pan that I don't see with native HD video from the camera, so... I'm pretty sure this is something that's going on with the camera when it's actually capturing in 4K.

Has anyone else noticed this? Am I doing something wrong? Do I have a setting messed up somewhere? I have the a6400 top-dial set to video mode, and haven't altered any other setting from the default, at least that I'm aware of. I know 4K is supposed to be higher quality than HD, but this stuttering effect is making my 4K videos appear to be lower quality than my HD videos, at least to my eye. Bit of a bummer! ☹️

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  • 6 months later...
Posted (edited)

Ran into this exáct same issue and tried to figure it out how to get rid of this for weeks now.
I think I just finally, finally found some settings that at least brings it to a minimum.

These are the settings I did/have:
Choose NTSC if you did not yet (instead of PAL)
Menu 1:
Aspect ration 16:9
Menu 2:
File Format: XAVCS 4K
Record Setting: 30p 100M
AF Drive Speed: Fast
AF Tracking sens.: Responsive

Choose Manual (rotation wheel):
Set shutterspeed to 1/60 (=2x30, the advised sh.speed)
Set F to 4.0
Set ISO to 'auto'
And Exposure you can play with a bit (I chose -0.3)

Now, for the very first time when I pan from right to left, I get an acceptable video movement....

Important to know:
By choosing '30p 100M' your lens/camera will start to zoom in a tiny little bit when pressing the record button...
No idea why, but only that it is so...
If you don't like/want that you can turn the Record Setting to 24p, but....
I couldn't get 24p working with a smooth movement while panning from right to left (or viceversa)....
If anyone does, pls feel free to let me know.

Edited by MisterT
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