Dirty Forums - UPLOADED! - NEW UPGRADE - 2017-10-20 Rijksmuseum, Amsterdam AUDIO and VIDEO

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Re: VIDEO UPLOADED!- UW Live Rijksmuseum 2017 UWV-001 (VIDEO)

Quote:

Originally Posted by TheBang (Post 164492)

Thanks, Matt. I looked over the 30 fps Facebook video, and it actually has a 25 fps signal inside. The frames are encoded in the following repeating cadence: ABCDEE

So, one second of video would look like this:

ABCDEE FGHIJJ KLMNOO PQRSTT UVWXYY

So, if you drop the duplicated frames, you end up with a smooth 25 fps. So, hopefully your software dropped the correct frames when converting to 25 fps, otherwise, there's going to be some judder. I'll take a look at what happened with your encode once I've finished downloading it.

So, the bad news is that the software resolved the 30 fps to 25 fps conversion by blending frames (blending two frames into one). Which would have been fine if it had blended the duplicate frames (two identical frames blended into one would have looked exactly the same). Unfortunately, it did not choose those, so instead you get a lot of frames that have ghosting artifacts. This is especially apparent on fast moves. I've attached an example of what the ghosting looks like on a single frame. (The vpro footage came out perfect, btw.)

Unfortunately, I'm not sure how to designate the correct cadence to Vegas, or if it can even do it. This will require more research.