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Canon XL H1 HD issues/problems
Hey!
Yeah, I already posted something similare but the thread went under in the list.
First of we have the H1 setup to do chroma key footage.
Camera is connected over SDI to AJA Ki Pro which as from Canon should be HD uncompressed!
The camera was used in Auto and manual mode with the following settings.
AE shift 0
Gain 0 and or -3
Auto focus
Stabelizer on the Lens is offThe environment which I think has nothing to do with following issue, is 4 point lighting.
Two for the green screen and 2 for the subject.
The footage turns out grainy and the key can be a pain do to the grain.Also I noticed when the magnified button is pressed for the EVF the capture is also magnified!
Is this normal? Can’t be? Is there a setting I missed?
Thanks any help on the grain and the EVF magnified mode.
At the moment we are not happy with this 9000 dollar disappointment. 🙁
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15 Replies
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Not sure about the grain issue, but yes…. when the focus assist magnification button is pressed, the viewfinder and all of the outputs get the magnified image.
That’s usually not a issue of course, as it normally is impossible to roll tape while in the “magnified” mode… or rather, as soon as you hit the trigger the magnification reverts to normal and can’t be re-activated as long as the camera is rolling.
The kink is, you’re not rolling tape at all apparently, but recording to an external source. Ergo, the camera doesn’t know it shouldn’t allow the magnification.
I do not know any way to disable the magnification. Best best is to just remember not to press the magnify button while recording.
I’m not sure about the grain… it shoudn’t be grainy. I’m certain you haven’t bought a $9000 paperweight… I use the H1 daily and it’s one of my all-time favorite cameras and have never had any issues like that. I think you just must have some non-opitmal internal settings, or are getting noise introduced somewhere down the chain (maybe with AJA?). Although I don’t know where the problem lies. Try shooting some footage to tape, then injesting it via firewire rather than the live HD-SDI and see if the grain is the same… just as a comparison test.
T2
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Todd Terry
Creative Director
Fantastic Plastic Entertainment, Inc.
fantasticplastic.com
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[Todd Terry] “you’re not rolling tape at all apparently, but recording to an external source. Ergo, the camera doesn’t know it shouldn’t allow the magnification”
If the magnifacation is on the grain will also be magnified by the same ammount. -
Thanks for the Quick Answers!
Okay I can live with the magnification but the noise or grain is not expectable.
Noise/grain is present magnified or not. I will do a test recording on to tape and see if there is a difference.If anybody know of a setting that I missed I would be thankful or any tips.
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Is the grain present in other video like a daylight shot?
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My bet is auto gain was active without knowing.
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No the Gain was and is on 0!
Green Noise in 100%
https://img232.imageshack.us/img232/4028/samplehdscale100.mp4Green Noise in 200%
https://img20.imageshack.us/img20/2879/samplehdscale200.mp4I will also shoot a message on the AJA Ki Pro board maybe its the device itself?
Thanks
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That may be, but even if it’s set to 0 or even a negative number if you have the auto gain switch active it obviously wouldn’t make a difference. Are you positive that’s not/wasn’t active?
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The Gain is on 0-+18,+36 and is set over the EVF 0.0.
Is this considered as a value and did I miss a setting on the Camera.After giving a good look in the EVF over the Magnified function you can see the grain. 🙁
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“That may be, but even if it’s set to 0 or even a negative number if you have the auto gain switch active it obviously wouldn’t make a difference. Are you positive that’s not/wasn’t active?”
Which auto gain switch do you mean? Out side on the casing or in the Menu?
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I don’t own the XLH1 and am only familiar with the XHA1 (the auto gain switch is separate from the 3 selectable settings switch on the side of the XHA1 body). I do however have a pdf manual of the XLH1 and I’ve noticed the auto gain switch is integrated with with the selected gain settings so I guess my advise earlier is moot. However… I believe if you have the power dial set to anything other than TV, AV, or M that gives you manual controls, auto gain will be active regardless what you have your gain set to.
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