URSA Mini Pro Issue Shooting 60P

So, I shoot quite a bit in UHD 60P using the Off-Speed Recording with my Project Frame Rate at 23.98 and the sensor frame rate at 60P. I've not had many issues with audio drift until firmware 5.1.1. I never tried 5.1 to confirm if the issue was introduced there.

Basically I bring my footage into Final Cut Pro X and put it on the timeline. I break off the audio and then speed up the video by 250% and the audio then exactly matches the video. This was great until 5.1.1. Now the audio is off in each clip and by a variable amount.

Has anyone else seen this behavior? My clips are generally 2-4 minutes each.

Adam

When Off-Speed recording, audio never has been in sync because the audio and video part of the camera are not interlocked.

Adam, if you’re speeding up the video in FCP X, is recording in camera with a 60 fps Project frame rate an option? Depending upon your client requirements. I use 60 fps for events. Then the audio and video will match.


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Hi Guys,

Hi Robert and Rick. Thanks for responding. Robert, you are correct that when shooting in off-speed recording that the audio and video are not in sync. They shouldn't be. I probably wasn't clear when writing this post.

Since owning the UMP, I've been shooting quite a bit in off-speed recording mode in 23.98/60. I've been able to sync the sound pretty easily up until firmware 5.1/5.1.1. How do I do this?

I drop the footage onto a 23.98 timeline in FCP X. It shows up in slo-mo as expected with the sound attached running at 23.98, so the sound is normal, not in slo-mo. Following me so far?

I detach the audio from the video and speed up just the VIDEO by 250%. Now, the sound is in sync with the video. Still with me? For the most part, this has worked for me without any issues until firmware 5.1/5.1.1.

Now, when I speed up the footage by 250%, the sound doesn't perfectly sync and is off by several frames.

Anyone else having this issue?

Adam

Adam, thanks for clarification - although I understood it already like this after your first post

The question is then: What has changed in firmware since the last version it worked for you?
I'd go through systematically:
1. Make sure you recorded 60p/23.98 and not 60p/24 in camera. (Compared to earlier work)
2. What happens if you use your footage in FCPX in a 24p project? Does it sync better then? Same? Worse?
3. What happens if you do a 60p/25 test? Does that sync correctly?
4. At your 60p/23.98 - what if you speed up the video by 250.25025% - does it sync then?
5. If you speed up video by 250% - what if you speed up audio by 100.1001% (or slow it down to 99.9%)?

Note: to be precise 23.98 is 23.976

Adam, thanks for clarification - although I understood it already like this after your first post

The question is then: What has changed in firmware since the last version it worked for you?
I'd go through systematically:
1. Make sure you recorded 60p/23.98 and not 60p/24 in camera. (Compared to earlier work)
2. What happens if you use your footage in FCPX in a 24p project? Does it sync better then? Same? Worse?
3. What happens if you do a 60p/25 test? Does that sync correctly?
4. At your 60p/23.98 - what if you speed up the video by 250.25025% - does it sync then?
5. If you speed up video by 250% - what if you speed up audio by 100.1001% (or slow it down to 99.9%)?

Note: to be precise 23.98 is 23.976

Hi Robert,

For number 1, I'm absolutely sure I'm recording in 60p/23.98 and not 60p/24. I'm using a preset, but I also just looked at the menu, and it's 23.98 for Project Frame Rate and 60 for Off-Speed Frame Rate.

I will check 2-5 tomorrow and come back with results.

Yes, 23.98 is 23.976. I only rounded up because I wanted to be consistent with camera settings.

Adam

Sorry for the delay. I've been traveling for the past couple weeks. I'm beginning to think that I must have messed with a setting to cause this. My latest footage is not experiencing the problem I had. I am going to shoot a long clip 4+ minutes to see if the sync issue has anything to do with longer clips.

Adam