Since the slider is in the middle by default, if I set the sharpening to zero, will it blur the source video? Also, I shouldn't have to mess with the brightness slider because I am going to keep it at YUV. I can always bring down the white point later.
https://forum.videohelp.com/threads/348981-Overblown-whites-when-capturing-Betamax-tapes#post2184717
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It depends on the capture device. With some "0" is no added sharpening. With others the middle is no sharpening, the left is blurring, the right is sharpening.
You won't be able to recover darks and brights if your cap has totally crushed blacks (ie, Y would have been less than 0) or totally blown out whites (Y would have been greater than 255). -
It depends on the capture device. With some "0" is no added sharpening. With others the middle is no sharpening, the left is blurring, the right is sharpening.
You won't be able to recover darks and brights if your cap has totally crushed blacks (ie, Y would have been less than 0) or totally blown out whites (Y would have been greater than 255). -
It doesn't work that way. You have to judge your levels by eye, for the most part. The only things that should be pure white are specular highlights and light sources, ideally. So if you have areas that are white blobs, turn down the gain until they show some detail. If they just turn into gray blobs, then the recording is clipped and there's nothing you can do. (It's also possible the VCR output is too hot, but that is a tech adjustment inside the cabinet.)
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Video8 and VHS are analog, not digital. You get whatever digital values your capture device converts those analog levels to.
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Unless you're designing your own video devices it doesn't matter to you. Whether it's 1 V or 1000 volts the numbers you get from the capture device will range from 0 to 255. Full black is defined as 16, full white as 235. As long as darks aren't crushed at 0 and brights aren't clipped at 255 you can adjust the picture to be withing the 16-235 range after capturing.
By the way, it's 1.0 volt peak-to-peak, from the bottom of the sync pulse to peak luma.
https://www.maximintegrated.com/en/app-notes/index.mvp/id/1184
http://www.ni.com/white-paper/4750/en/Last edited by jagabo; 3rd Dec 2017 at 23:01.
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