BM6K Pro Gyro Drifts In Resolve Stabilization

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Jason Szumlanski

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BM6K Pro Gyro Drifts In Resolve Stabilization

PostMon May 29, 2023 12:28 pm

From the time I got my BMPCC6KPRO, when using Camera Gyro stabilization in Resolve, the image drifts up and to the right for the first 4 seconds on EVERY clip. I tried calibrating the gyro with no success. I didn't realize this until I purchased a 100-300mm zoom lens, and the effect is much more pronounced.

This happens even if the camera is sitting still on a solid surface. But then I realized that it doesn't just happen at the beginning of the clip. If I split a clip in the middle and then do a gyro stabilization in Resolve, the drift will occur from the split point in the clip, drifting up and to the right from that point for about 4 seconds. That leads me to believe it's a Resolve issue, not with the gyro data. It's very strange, and it makes the gyro stabilization unusable with longer focal lengths because it crops in too much and the drift is very pronounced.

Does anyone else see this? There is a post in the Cinematography section that indicates a similar problem for a user, but they have more of a rotation issue than a drift.

On mine, the drift is always pretty much straight up for 4 seconds - exact same length of time on every clip. And then there is a slow drift to the right for a couple of seconds. It follows the exact same path every time.
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Peter Chamberlain

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostTue May 30, 2023 12:50 am

Which specific version of Resolve and OS are you using?
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Jason Szumlanski

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostTue May 30, 2023 1:01 am

Peter Chamberlain wrote:Which specific version of Resolve and OS are you using?


Mac OS, M1 MacBook Pro

This was happening in Resolve 18 Studio. I upgraded to 18.5 Public Beta 3 today and the issue remains the same.
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Jason Szumlanski

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostTue May 30, 2023 1:03 am

You can see what happens here. Unstabilized raw footage followed by stabilization applied.

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VMFXBV

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostTue May 30, 2023 11:59 am

I'm the user in the Cinematography forum and its very similar to what I experience, a drift in one direction from the starting point of the stabilization for aprox. the same duration as the OP and also looks very similar to the video he posted.

If I skip to some other part that is nice and steady, remove the stabilization and use this as a new starting point it drifts the same way.



The video above shows how it behaves on my system. I've also exaggerated the scrubbing part in the edit tab to portray the issue more clearly. Trimmed the clip and re-applied gyro.
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VMFXBV

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostWed May 31, 2023 8:54 am

Forgot to post specs:

Windows 10 22H2
Resolve 18.0.3 (cannot upgrade due to Black Sun Highlight Recovery).

Bump!
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Jason Szumlanski

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostWed May 31, 2023 11:55 pm

VMFXBV wrote:I'm the user in the Cinematography forum and its very similar to what I experience, a drift in one direction from the starting point of the stabilization for aprox. the same duration as the OP and also looks very similar to the video he posted.

If I skip to some other part that is nice and steady, remove the stabilization and use this as a new starting point it drifts the same way.


Thanks for confirming I'm not crazy. So this doesn't appear to be a camera hardware issue. It suggests there is a bug in the Resolve stabilization processing.
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Paul Millard

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostThu Jun 01, 2023 12:50 am

Same effect for me using 6K G2.
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VMFXBV

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostThu Jun 01, 2023 9:31 am

There is another bug that I don't think it has been fixed and cannot check until I update to the new versions.

75fps gyro clips from the Pocket4K stutter like crazy.
And it has been confirmed by Captain Hook (BMD employee) in the Cinematography forum.

Which means, this is a possibility its Resolve related and not camera related.
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Jason Szumlanski

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostThu Jun 01, 2023 4:06 pm

VMFXBV wrote:There is another bug that I don't think it has been fixed and cannot check until I update to the new versions.

75fps gyro clips from the Pocket4K stutter like crazy.
And it has been confirmed by Captain Hook (BMD employee) in the Cinematography forum.

Which means, this is a possibility its Resolve related and not camera related.


This reminds me to mention something. The same stabilization drift issue happens for me with clips from my BMPCC6KPro at all frame rates and all resolutions. It happens with all lenses (with more pronounced effect on longer lenses). Gotta be a Resolve bug.
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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostThu Jun 01, 2023 4:46 pm

Jason Szumlanski wrote:
This reminds me to mention something. The same stabilization drift issue happens for me with clips from my BMPCC6KPro at all frame rates and all resolutions. It happens with all lenses (with more pronounced effect on longer lenses). Gotta be a Resolve bug.


The drift happens everywhere. The violent shake only with clips over 60fps.
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Jason Szumlanski

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostFri Jun 09, 2023 10:47 am

Just a follow up... Blackmagic has acknowledged that this is a Resolve bug. They were able to duplicate the issue using their cameras. Now I guess we are just waiting on a bug fix in a future update.

It's refreshing to have a bug report acknowledged and customer support to follow up in the manner they did.
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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostFri Jun 09, 2023 11:42 am

Until then, use Gyroflow.
Now that the cat #19 is out of the bag, test it as much as you can and use the subforum.

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostFri Jun 09, 2023 1:14 pm

Jason Szumlanski wrote:Just a follow up... Blackmagic has acknowledged that this is a Resolve bug. They were able to duplicate the issue using their cameras. Now I guess we are just waiting on a bug fix in a future update.

It's refreshing to have a bug report acknowledged and customer support to follow up in the manner they did.


Cool. Looking forward to use it when its fixed.
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Håkon Broder Lund

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostFri Jun 09, 2023 2:16 pm

Great! I've seen drifts myself. It drifts for a second or two until it settles. My workaround has been to extend the clip two sec before I actually want to cut. Gyro stabilize, then after cut away those two sec once stabilization is done.
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Jason Szumlanski

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostSun Jun 11, 2023 3:32 pm

Håkon Broder Lund wrote:Great! I've seen drifts myself. It drifts for a second or two until it settles. My workaround has been to extend the clip two sec before I actually want to cut. Gyro stabilize, then after cut away those two sec once stabilization is done.


This really doesn't work for long focal lengths because the stabilization crops in way too far. But it can work on some clips.
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VMFXBV

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostTue Oct 24, 2023 5:02 pm

This is still an issue in 18.6. Any word on an update?
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Jason Szumlanski

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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostTue Oct 24, 2023 7:53 pm

VMFXBV wrote:This is still an issue in 18.6. Any word on an update?


I concur - this issue still exists and it makes camera stabilization useless at all but low focal lengths. It's very frustrating since camera stabilization is more useful and important at longer focal lengths.
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Re: BM6K Pro Gyro Drifts In Resolve Stabilization

PostMon Dec 11, 2023 9:57 pm

Anyone tried 18.6.4 to see if its fixed?
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