Comment by JKCalhoun

4 hours ago

> Forget about 1/50 for 25p. There will be the most horrible artifacts.

(My ignorance,) is motion blur no longer a thing in modern digital?

(I'm also confused: 1/50 is the shutter speed and 25p the frame rate?)

4 comments

JKCalhoun

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Gigachad  4 hours ago

Normally you double the shutter speed compared to the frame rate to include a motion blur that looks good. But if you then apply stabilisation post processing, you end up with a shot that has motion blur yet isn’t moving. So you want to set a very fast shutter speed, and then you might introduce fake motion blur in post processing later that matches the movement of the stabilised video.

  • JKCalhoun  1 hour ago

    Interesting—and makes sense. (Perhaps motion blue becomes a post-process as well then, ha ha.)

    Kind of a tangent: One of the remarkable things to me about the "Dykstra flex" cameras developed for Star Wars was that the dolly/stepper-motors moved the camera while the shutter was open giving those fly-by shots full motion blur. Freeze any frame where there is a space battle and it is obvious.

    That small detail was not small at all in selling the effects of the film.

    But one of the effects guys joked that some team had borrowed the camera for some effects they were doing for a TV show or film—and they used Dykstra-flex in sort of a "stop motion" manner. He was dumbfounded why someone would move the camera, pause to expose a frame, move again to the next location, pause to expose. Just walking away, leaving motion-blur on the table…

    • dylan604  27 minutes ago

      This is one of those things that pops up on fixed aperture cameras where the only way to control the exposure is with shutter speed when using GoPros in the early days of live action VR. We'd also run at 60fps. Any kind of motion blur would just become problematic when trying to stitch the footage together especially since the cameras were catching objects in different parts of the wide angle lenses.