Cintel 2 Vertical Stabilisation 16 mm print issue

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BillArchive

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  • Joined: Thu Aug 08, 2019 3:40 pm
  • Location: London UK
  • Real Name: Bill Bulford

Cintel 2 Vertical Stabilisation 16 mm print issue

PostThu Jun 03, 2021 10:08 am

Our users have occasionally reported film sections with some single frames that on scanning have jumped vertically that later had to be manually repositioned in an edit. It is not always reproducable when re-scanned.

I got to see some today and it looks like that in this case the film printing process has a printed illuminated window between the sprockets to let some edge data through. The window position is a little unstable. We imagine that the horizontal black / white window edges seem to confuse the stabiliser as a shifted sprocket hole edge on some frames. Disable the Y stability and the downwards jump effect goes away.

I enclose a couple of off screen images including a split image: a pair of adjacent frames produced by a simple x position shift of one layer using the same clip showing the vertical offset at a jump.

Some control that can modify its behavior on such material would have been be useful as we now have 50 minutes of content to correct for jumping.

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IMG_20210602_162702381a.jpg (104.96 KiB) Viewed 801 times

IMG_20210602_143955729 acopy.jpg
IMG_20210602_143955729 acopy.jpg (48.17 KiB) Viewed 801 times

IMG_20210602_162843688a.jpg
IMG_20210602_162843688a.jpg (59.75 KiB) Viewed 801 times




Cintel scanner 2 running v4 drivers, desktop video 11.5.1, resolve 17.2.0 on Windows 10 via thunderbolt
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James Little

Blackmagic Design

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Re: Cintel 2 Vertical Stabilisation 16 mm print issue

PostMon Jun 07, 2021 2:29 am

Hi Bill,

in cases like these, we ask for you to contact support and provide us with some seconds of CRIs demonstrating the issue.

In principal yes we can correct these in post by modifying the metadata, however we also need to analyze why this happened to put fixes into future releases.

Regards
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Marc Wielage

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Re: Cintel 2 Vertical Stabilisation 16 mm print issue

PostTue Jun 08, 2021 11:12 am

CRI's are a nightmare even under the best conditions.

I just fix it by hand and move on. Happens all the time with all kinds of scanners and all kinds of stabilization systems.
marc wielage, csi • VP/color & workflow • chroma | hollywood

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