2 replies to this topic

[Cinema_EOS]

Some slides from Larry Thorpe's presentation of the EOS 1D-C at Canon's event at NAB:

[TFG]

Great! just the sort of info I was looking for. Wish I could have been there!

I don't know much about motion JPEG. Anyone else?

[BobEngland]

Actually, Motion JPEG, or M-JPEG as we used to refer to it, is one of the oldest video codecs there is. I first remember it being using for QuickTime on the Mac with the original Adobe Premiere. Ever heard of a product called Radius VideoVision? Or SuperMac DigitalFilm? Or Media 100? All used flavors of M-JPEG and back in the early/mid 1990s were among the first video capture cards to allow high quality full-frame capture and playback.
Unlike most codecs today, which use interframe compression (meaning they compress across multiple frames of video), M-JPEG uses intraframe compression, so each frame of video is compressed by itself. This is less efficient, but it's also less computationally complex, so it requires less computing horsepower. Also, the fact that each frame stands on it's own made it easier for the NLE software to deal with. With the huge amounts of data involved with 4K, I suspect that's the reason M-JPEG is being used; it doesn't require as much computing horsepower. Also, unless I'm mistaken, there are no fees for licensing.