If a DSLR can record 1080p video at 60fps, why is it only capable of continunous shooting at, maybe 5fps? If frames per second are frames per second why can't you take 60 photographs per second? Is there something fundamentally different about a frame of video, compared to an individual photograph?

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    Another major difference in a frame of video vs a photograph is that video frames are stored as deltas. You capture a full frame and then each consecutive frame simply stores what has changed form the one before it. This make for a much smaller amount of data stored in the vast majority of frames, compared to a still, even if you disregard the resolution (2MP vs 10+). – Robin Sep 16 '14 at 18:19

Let's say the average DSLR shoots at around 10MP (and that's probably a low estimate these days.) The number of pixels in a 10MP photo is around 3872 x 2592 (assuming a somewhat standard sensor.) Clearly much larger than your 1080 x 1920 video. "10MP video" would be in the 4k range. Which by the way is all the rage these days. :)

There's also the fact that video systems tend to use interlaced field capture where basically every other line is scanned and the rest are filled in from the data around it. You don't really notice this in the video but if you take a still from a video it's pretty easy to notice the lack of sharpness.

Hope this helps.

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A still frame from a modern camera is 15+ megapixels, and potentially going to have every pixel looked at with a critical eye. A frame of HD video is 2 megapixels, and not going to subjected to the same level of analysis at 100% crop; at this point, I think it's more a question of why you'd think they would have the same frame rate.

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  • ok, that was kind of my question; that a photograph has 15+ megapixels of data where a hd video is only about 2. that i did not know. – user74091 Sep 16 '14 at 3:58
  • as far as why i think they would; i did not. i just noticed those are two specs measured in the same units and naturally wondered what the limitations were if in facts those are both , respectively, the upper bounds of each. – user74091 Sep 16 '14 at 3:59
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    You probably want to look up why HD video is called *1080*p :-) – Philip Kendall Sep 16 '14 at 5:03

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