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Silicon Imaging SI-2K
2/3" 1080p IT-integrated 10-bit digital cinema w/direct-to-disk recording.


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Old June 24th, 2006, 09:01 PM   #1
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More great updates from spoon

Hi everyone,

Francois has posted some more images and information over on the spoon site:

indiefilmlive.blogspot.com
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Old June 24th, 2006, 09:19 PM   #2
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what is the "grounding " issue ? and what does it do ?

also i see when released the camera will run up tp 72fps in 720p ..
why no slo-mo in 1080 mode ??? it does 30p but can it do 30fps and put a 24p header on the clip data ? ( so one doesn't have to take it into FX program and retime it) so it plays back at 24fps not 30p ? just seems it should be able to squeeze out 36fps ??

i see that spec's state "10-F Stops Dynamic Range, 4.5 F-stops over-exposure lattitude in WDR"

is that spec different recording to the USB drive ??
is yes - what is the range going to USB drive ??
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Old June 25th, 2006, 01:04 AM   #3
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Hi Don . . .

I'm not sure what the "grounding" issue is . . . I think they had some issues with how they were wiring things up (they are doing a lot of stuff themselves since we're not there supervising) so that the camera head was becoming the electrical ground and creating some static in the image . . . sounds odd to me, but that's how they explained it. Point is they re-wired and fixed the issue. We've never seen the issue with any of our setups, so we're not sure what the deal is.

Yes, you can very easily record at 30fps and play back at 24fps. BTW, in Premiere Pro it's as simple as saying "interpret footage" for what you want the frame-rate of playback to be inside Premiere. Just shoot and record and then playback at whatever rate you want.

We can't get 36fps across the 100MB/s gig-e connection (the gig-e carries RAW 12-bit, not 10-bit data) . . . nor with the current mobile computer systems can we encoder 36fps at 1080P in real-time which poses some issues. We are looking into cropped modes though for doing higher frame-rates. For instance, at 2.39:1 we can get higher frame-rates up to around 42fps for 1920 pixels across.

There is no difference in dynamic range when recording to the USB drive . . . the dynamic range is the same . . . it's the 12-10 bit conversion LUT that we're using off the A/D converter that gives you this visual dynamic range, and since we're using a 10-bit recording file format, all the dynamic range from the A/D conversion process is maintained.
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Old June 27th, 2006, 02:37 AM   #4
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Grounding

Hi all. The 'grounding' issue was no big deal, yes it was just a simple wiring thing. Initialy we were running the computer's off the power from the hall we were shooting in and not from the generator, so the computers, being connected to the heads, were rying to find ground through them, since they were standing on the floor. Plus the ground was flooded with water...
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Old June 27th, 2006, 09:11 AM   #5
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Thanks for the update Francois :)
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