>>3114604You know how high-end video cameras have fewer megapixels, but capture better videos than DSLRs with more megapixels?
Every time you capture from a sensor, it generates heat.
Photo CMOS are optimized for at most 15 captures per second in burst while video CMOS are optimized for sustained 60+ captures per second.
DSLR image processors get around this by activating only every fourth or third pixel for video capture and even moving them around the sensor to keep the sensor from getting too hot.
Sony got the photo CMOS sensor getting too hot for capture problem down pat with photo sensors that generate less heat and image processors that are better at moving the active parts around to spread out the heat.
Canon hasn't.
The reason Canon can't push the video to 4K in the new DSLRs is because the number of pixels that have to be active on the CMOS increases 4x going from 1080p to 4K, and their photo CMOS will overheat when 4 times as many pixels are active in sustained basis and damage the camera (unlike Sony's).
