Here's some sums - please feel free to correct me if I've got this wrong. Pro Res HQ - 10bit, 422, 1080p - has a bit rate of 220Mb/s. This equates to 26.23MB/s. Even the old sandisk extreme pro 95MB/s has read/write speeds comfortably in excess of this.
The cfast adapter I've bought claims read/write speeds are only limited by the speed of the cards being used. I hope to test class 3 card speeds next week when my usb 3 reader arrives. Anyone care to recommend a good pc utility for said speed testing? Thanks.
@arum - sorry, no usb3 adapter. I have an elderly dual quad core HP workstation still doing sterling service at home. Will check it out at work tho..
Where do you have definitive evidence for that? Pro-res HQ has a bit rate of 220 in 1080p. Regular Pro Res at 140Mbps (still 10bit 422) doesn't seem like too much of a stretch given the camera records 1080p at 200Mbps internally. Sure, it's a gamble, but I'll only have wasted £25 on the adapter if it doesn't work out. I'm not really bothered with the hoohah about 4k - it's solid 10bit 422 1080p I'm more interested in (that and not having to work around the GH2's flaws.) Everything else is jam.
If the U3 SD cards aren't fast enough to record 10 bit 4:2:2 in camera, doesn't it stand to reason that they won't be fast enough to record it via HDMI/CFast adapter either?
Sweet, sweet, sweet. Do you have a USB-3 adapter to test its speed @mrbill? Because using that adapter looks like the best way to go right now.
Here's my cfast adapter with a kingston 64gb class 3 card installed
I'm not sure about what was said in the interview but Atomos' website refers to 128GB Cfast cards available for $350. I haven't found one quite that cheap but this one is close: http://www.amazon.com/128GB-Apacer-CFast-M-APCFA128GQAHS-DCM-Embedded/dp/B00D0FJ1IO
I look forwards to your review. I saw a review for their compact flash adapter on German amazon that said that the speed was really low, but maybe they have sorted that out on the cfast version.
I bought this today. Hoping it will be good for re-purposing my 95mbs sandisk cards
Same here and the prices of even the 32GB cards I have found make the BMD Hyperdeck look way more attractive. I am really hoping someone else jumps in and starts producing reasonably priced external recorders witth 10bit 422 hdmi in.
It looks like you're new here. If you want to get involved, click one of these buttons!