I took delivery of my AJA Ki Pro Mini yesterday (I lucked out and found one at Adorama – they had two at the time, but I suspect the other one is already gone), and after ferreting out two CF cards that are fast enough to handle the ProRess422 (HQ) stream that the Mini will drop onto them, I took it to set this evening to shoot another scene for the “Piracy” trailer.
But before I did that, I made sure to do a couple of comparison tests with footage that was captured to the camera’s SD card. Below is a combined screen cap of the scopes in Final Cut Pro of frames that were recorded simultaneously.
The top image is if a frame that was recorded to the camera’s SD card via the AVCHD codec, than transcoded to Apple ProRes422 (HQ) with the FCP log and capture function. The bottom image is of a frame that was recorded to the AJA Ki Pro Mini from the camera’s HD-SDI port, and converted on the fly to ProRes422 (HQ) by the mini. Visually both clips were very similar, with the slight nod going of course to the HD-SDI frame. However, the real advantage to the native ProRes recording comes in post.
Both clips were dropped into the same FCP timeline and had the same [very] basic color correction filter applied to them. Note the difference in the histograms between the two after the color move was applied. The frame that was recorded with the Ki Pro Mini held together nicely, while the AVCHD frame broke apart immediately. Imagine how much worse it would be with larger color moves applied to it.
The AJA Ki Pro Mini is really easy to use on set. It automatically detects timecode in your SDI signal and starts recording when you hit the button on the camera. By my estimation, a 32GB card gets you about 20 minutes of storage. Not bad.
It’s also smaller than I thought it was going to be. It actually fits on the rails quite nicely behind the camera. One thing that I do find unsettling about it, though, is that it gets quite hot. That’s understandable, considering the amount of work it’s doing, converting uncompressed video to ProRes422 in real time. That takes a lot of horsepower. Still, though, when you pull the cards out of it, they can be very hot indeed. Not sure if that affects the life of the card or not.
Look for more Ki Pro Mini updates to come…