Quote:
Originally Posted by RanmaCanada
Most media these days are shot on solid state, so there is no film grain. Film grain makes a HUGE difference in compressibility.
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Solid state sensors still can have gain noise, which has pretty similar compression challenges as grain. Bigger sensors, longer exposures, and brighter lighting all help reduce that, just like they did with analog film.
In a given situation most digital cameras are going to be a lot better than typical 35mm film, but digital cameras also get used in situations where no one would have even tried to use film before.
Supersampling is valuable here, where the sensor has more individual picture elements than the editing format it'll be converted to. Note that a sensor's pixels are either Red, Green, or Blue, while encoded pixels each have Red, Green and Blue values. So 4K camera to 4K post actually requires some spatial upsampling as part of the conversion from the Bayer pattern sensor to a video format.