Up/Down/CrossHD - Video Jitter?

Do you have questions about Desktop Video, Converters, Routers and Monitoring?
  • Author
  • Message
Offline

BMoede

  • Posts: 3
  • Joined: Fri Jul 06, 2018 6:43 pm
  • Real Name: William Moede

Up/Down/CrossHD - Video Jitter?

PostTue Nov 27, 2018 7:25 pm

Good morning, everyone.

In our main auditorium, we are using (still!) Sony D50's with 16x9 blocks installed. That makes upconverting the video signals to 720p relatively easy. The system has worked great using an FS2 for our primary cameras and an older BM Up/Down/Cross for the audience Q&A camera to handle the upconverts. We just tried installing 2 new Up/Down/Cross HDs for Cameras 1 and 2.

Unfortunately, the UDC-HDs introduced a video stutter or jitter into both cameras. After testing with the FS2, we concluded it's definitely the Blackmagics that are causing the issue. There was no smooth motion when a speaker moved.

Has anyone seen this happen before? These are new, out of the box, with the Converters 7.3.2 software installed and the latest updates pushed to each converter.

Thanks in advance for your thoughts and time!

-Bill
Offline
User avatar

Marc Wielage

  • Posts: 4962
  • Joined: Fri Oct 18, 2013 2:46 am
  • Location: Hollywood, USA

Re: Up/Down/CrossHD - Video Jitter?

PostSun Dec 02, 2018 7:09 am

Call me crazy, but I would avoid shooting standard def in 2018 and I would replace the cameras with modern 1080p HD cameras and not do any processing at all. There's a ton of cheap 1080p cameras out there -- even a 6-camera setup need not cost a lot of money or be complicated to use.
marc wielage, csi • VP/color & workflow • chroma | hollywood
Offline

BMoede

  • Posts: 3
  • Joined: Fri Jul 06, 2018 6:43 pm
  • Real Name: William Moede

Re: Up/Down/CrossHD - Video Jitter?

PostMon Dec 03, 2018 3:08 am

Marc, while I agree with your sentiment, our hands are tied by the client. As a contractor for the government, we use the tools that we are given. And right now, management has not indicated an plans on allocating funds to upgrade the video system.

So, we use what we have. But I'm still wondering if anyone has had issues with upconverting SD material using the new UpDownCross-HD? The old ones work great. The new ones...not so much.

Thanks,
-Bill
Offline
User avatar

JPOwens

  • Posts: 1418
  • Joined: Fri Apr 12, 2013 8:04 pm
  • Location: Victoria, British Columbia, Canada

Re: Up/Down/CrossHD - Video Jitter?

PostMon Dec 03, 2018 6:29 pm

BMoede wrote:a video stutter or jitter into both cameras.


What conversion have you invoked?

My guess would be the original cameras are 29.97 interlaced -- are you attempting a de-interlace/segmented scan/progressive output?

jPo, CSI
Offline

BMoede

  • Posts: 3
  • Joined: Fri Jul 06, 2018 6:43 pm
  • Real Name: William Moede

Re: Up/Down/CrossHD - Video Jitter?

PostMon Dec 03, 2018 7:31 pm

Hi JP...

Yes, we're trying to go from 525 @ 29.97i to 720 @ 59.94p. Is the quality super? No. But it's acceptable for our internal IPTV system. And the old UDC does a perfectly adequate job. It's just the new version of the box isn't playing nicely. I've gone through the software setup and there's really nothing that we can change, other than the setting that the SD signal is 16x9 vs 4x3.

I don't see any other settings that we can play with, unless I'm missing something somewhere.

All the best,
-Bill
Offline
User avatar

JPOwens

  • Posts: 1418
  • Joined: Fri Apr 12, 2013 8:04 pm
  • Location: Victoria, British Columbia, Canada

Re: Up/Down/CrossHD - Video Jitter?

PostTue Dec 04, 2018 10:07 pm

BMoede wrote:720 @ 59.94p


Might be a dominance or filed oreder issue, then... a lot of Blackmagic behaviour defaults to segmented rather than true progressive. Starting out with time base related field dominance is not likely to play nice with most displays anymore, either.

jPo, CSI
Offline
User avatar

Daniele Bemportato

  • Posts: 47
  • Joined: Wed Aug 22, 2012 9:23 am

Re: Up/Down/CrossHD - Video Jitter?

PostThu Dec 13, 2018 12:20 pm

Same problem here, converting PAL 25i to 1080i50 or 1080p50.
Up/Down/CrossHD always deinterlace input signal.
So PAL 25i becomes 25p then converted to 1080i50 and it looks like progressive.

I asked to BlackMagic and they said it's a feature, not a bug. Very disappointing.
Asus X99-E WS USB 3.1 - Intel i7 6850K - RAM 32 Gb - GeForce 1080Ti
Decklink Extreme 4K
Windows 10 Pro

Return to Post Production

Who is online

Users browsing this forum: Google [Bot], Google Feedfetcher and 4 guests