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weird edge ‘shimmering’ with XD footage
Hi guys .. I’ve posted this in the Broadcast Video forum but am hoping to have some more luck here …
We have had a few things shot on XD lately (PAL, SD @ IMX 50Mbps) and are having some problems … the edges are producing a weird shimmer when there is movement. It is most noticeable on hard angles while dollying in (like the roof of a house).
We never have this problem with digiBeta or SP.
We have tried different sequence settings/field orders in FCP. It is also noticeable in After Effects (and we have tried interpreting all different ways).
It is not like interlace jitter. There is no interlace combing. It is more like a wavie/shimmery look.
Any advice would be great. Is there a possibility that there is a camera setting for detail or something? or some other camera setting that could cause this?
Thanks in advance.
Michael Duff –
Bearcage Productions, Australia
http://www.bearcage.com.au -
9 Replies
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Are you looking at this on a monitor? This sounds like compression to me.
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Hi,
it is visible on all monitors (computer monitor, broadcast CRT, broadcast LCD, plasma)Michael Duff –
Bearcage Productions, Australia
http://www.bearcage.com.au -
i’ve just uploaded a couple seconds of the source video where the shimmering is visible. It is mostly noticeable in the lower right corner of the screen.
The video is interlaced and should be interpretted upper field first.
https://www.bearcage.dreamhosters.com/sample.mov
thanks!
Michael Duff –
Bearcage Productions, Australia
http://www.bearcage.com.au -
I’m not connected to a monitor right now but it sounds like the dreaded cmos chip rolling shutter.
“everything is broken” ……1st. coined by Esther Philips I believe.
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Ummm… no, it’s not the dreaded cmos rolling shutter issue. The XD footage referred to by the original poster is IMX 50, that means it was shot with the PDW-530 SD camera, which of course, does not use CMOS imagers.
Sony PDW-F350, Apple FCP 5.1.2
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I’m not sure exactly what camera it is … but I can find out if it is the PDW-530 …
any other ideas what could be causing this?
Michael Duff –
Bearcage Productions, Australia
http://www.bearcage.com.au -
Michael, the ONLY XDCAM camera that shoots IMX format is the PDW-530. The other SD camera is the 510 which is DVCAM format only. The XDHD cameras shoot in MPEG2 format.
Hope this helps,
Greg Boston
Sony XDCAM ICE TeamSony PDW-F350, Apple FCP 5.1.2
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thanks greg, it is definitely shooting IMX so must be the PDW-530 …. have you seen anything like this edge artifacting before?
Michael Duff –
Bearcage Productions, Australia
http://www.bearcage.com.au -
I haven’t looked at a monitor with it yet, but it looks like compression to me.
Could be an artifact of the compression scheme?
Jeremy
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