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25p – is it realy progressive?
i am new HVX user and little confused with picture quality. I just back from shooting rock concert and 99% of my footage i found horrible. I shot on tape with 25p setting but all frames has horisontal lines as it is interlaced. please check the links below for the samples and let me know why it is like this and what i have to change to get rid of it terrible effect.
actually here on pictures this artifacts looks better then it is in FCP. i think screen capturing doing some light deinterlacing or something like that.
thank you in advance
Andrew -
8 Replies
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That looks like DV Red to me. What you are seeing is the limited color space of DV, not interlacing. Turn down the red and see what happens.
Jeremy
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not only red color has such strips but blue and green also. what is the best way to turn down red color? i was using color corrections 3 way.
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Looks like far too much red in the original captured image. Some shots cannot be saved…
Noah
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What you encountered is the limits of 4:2:0 color sampling. All DV cameras will perform the same way. Pure colors (red and blue) get quantized at only 1/4 the resolution of the rest of the picture. If you shoot a pure red object (like you did), you get only 360×288 resolution. Chroma (color) information isn’t resolved at the same resolution as brightness (luma) is. Only the brightness is sampled at 720×576; color information is sampled at 360×288 in PAL.
In short, try not to shoot things that are illuminated as a single solid red or blue. Or if you have to, use DVCPRO50 mode instead, it has twice the color resolution of DV.
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Noah, thank you. how to save the rest of the footage. i mean to try to save parts without so much red.
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thank you Barry. so, it means that such colorful scenes i can not shoot on DV? 🙁 i do not have time to refill p2 cards during performance. no time. also no money for FS100 yet.
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You could give the film filters from Graeme Nattress a try. One is called “G Chroma Sharpen” (the name is a tad misleading), which is interpolating or smoothing the reduced color information of DV.
There’s a very informative white paper on his site about the problem and you can download a demo version of the filter package ( http://www.nattress.com ).
Hope this helps,
Uli
Author of “DVDs gestalten und produzieren”, a book on professional DVD-authoring in German.
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thank you Uli, going to try that plug. sounds promissing.
Andrew
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