Hi all
I've kinda seen this before, but not this bad.
On a recent gimbal shoot with a 17mm zoom lens, a pan turns out unusable because of extremely jerky frames, especially visible in the lighter wooden plank.
Is it a 25p issue? A shutter issue? An AF issue?
Shot on an FX3, 4k 10 bit XAVC I rendered to HD
Thanks for any hint!
@Mindmatter Hi, I've seen this & there's been a couple of posts about it, converting to Constant maybe the fix for this.
This is one, I can't find the other posts..
https://www.vegascreativesoftware.info/us/forum/rendered-videos-stutter--145832/
Thanks, but the Sony FX3 codecs are not variable frame rate.
What was the source shutter speed and framerate (it was 25p)? The slower the framerate the slower the pans need to be. Search for "judder" and pan and there are some rule of thumb guides. For shutter speed, 1/50 is normal for 25p footage.
Yes, 25p and 1/50, as usual.
I may have found a reason but need further testing:
I had active IBIS on while using the gimbal. Some research indicates that having 2 stabilizations at the same time creates these kind of artifacts with wide lenses.
Having said that, it's true that 25p doesn't work well with fastish pans.
@Mindmatter better post the original file for download. The videofile embedded in your post is probably also reencoded to 30fps by the forum.
Shot on an FX3, 4k 10 bit XAVC I rendered to HD
A couple of thoughts:
Does the camera original before rendering to HD suffer from the jerky pan?
If no, which render template was used for the HD render? Was it 25p to 25p or to 25i?
Yes, 25p and 1/50, as usual.
I may have found a reason but need further testing:
I had active IBIS on while using the gimbal. Some research indicates that having 2 stabilizations at the same time creates these kind of artifacts with wide lenses.
Having said that, it's true that 25p doesn't work well with fastish pans.
That could be it. Personally I use IBIS on my Sony with a gimbal but I'd suggest testing both ways.I use the less powerful steadyshot setting to just reduce microjitters.
As 3point requested could we see the original? The forum version does look rough but it's hard to say.
Yes, 25p and 1/50, as usual.
I may have found a reason but need further testing:
I had active IBIS on while using the gimbal. Some research indicates that having 2 stabilizations at the same time creates these kind of artifacts with wide lenses.
Having said that, it's true that 25p doesn't work well with fastish pans.
@Mindmatter Yep, In that link I mentioned 'I occasionally get this stuttering, my Samsung phone has a Stabilization feature which does remove shakiness but it does create a bit of a lag when panning the camera around,'... Converting to constant helped with mine but if yours is already constant.... 🤷♂️