Who wants to shoot 422 10bit 1080 50p Green Screen footage with your Panasonic GH4 ?

Categories: Media 4 Comments


Just 2 days till we get our GH4/YAGH and already its apparent there is no way to produce 10bit 422 Full HD footage to an external recorder…its a joke. Thanks to Panasonic we only get 10bit 422 via the HDMI or the SDI output of the YAGH, this is a nonsense and has crippled the GH4 for recording green screen shots straight from the camera onto the internal SDXC card.

Your only option is an external recorder but sadly there is no suitably priced external recorder on the market that allows 1080 50p footage.


Atomos does not produce a 1080 50p external recorder till the end of 2014..the £1500+ Shogun which uses very expensive CFast media, even the SDI “BLADE” only produces 1080 25p footage. Reading further Atomos are looking to have the Shogun shipping during IBC in September but I hope their prediction of having CFast cards at consumer price levels is correct.


The Odyssey by Convergent design is promoted as a “monitor only” at £2000…Here is the info from CVP’s web site “Out-of-the-box, Odyssey7 & Odyssey7Q products are monitors only, without any recording or playback capabilities. Recording options must be purchased (or rented) separately from the Convergent Design website, available 24/7, via a secure credit-card transaction. A wide range of recording options will be available, including compressed, uncompressed and various flavors of RAW.”



This is the Sony option, to be fair you will always need to buy your SSD on top of your external recorder but a further $795 for the convenience of making the “MONITOR” into a “RECORDER”…I think this will all change when ATOMOS bring out the Shogun.


The AJA Ki Pro mini at £1600 is limited to 1080 25p


Lastly the Blackmagic Hyper Deck shuttle at an amazing price of £255 is once again handicapped by a 1080 25p HD Format.

It seems to me that you only get 1080 50p with 4K models rather than the companies producing a Full HD recorder that gives you 24, 25 and 50p.

If I have missed a reasonably priced external recorder that records 10bit 422 1080 50p please let me know.

For all your video production needs in Scotland, get in touch with Small Video Company Ltd

Don’t skimp on the Media

Categories: Media 3 Comments


SDXC cards are at a price that you would be a fool not to buy them over SDHC cards. A 64G SDXC card is now £26 and that’s a UHS Speed Class 3 card fast enough to record 4K.


It’s important to remember how flimsy a normal SD card actually is and it does not take much to unhinge the memory from the board. Everything is spot welded and there are over 40 miniature welds per wafer underneath the two memory boards, the act of dropping the card on a hard floor is enough to cause irreversible damage.


One of my regulars, Charles, has given me a more precise update on cards and their speeds, over to you Charles…

“Both the C class and the U class are minimum sustained write speeds which is the important one for video as this must be higher than the video stream rate to stop drop outs.

The C class is the traditional SD card databus and the U class is the newer UHS databus.

If you put a UHS capable SD card in a non UHS capable device it will fallback to the traditional databus. UHS cards can be marked with a C class as well for this reason as your Panasonic is, but it’s not essential as it’s an unusual situtation.

UHS itself has two versions markeds as an I or II after the SD logo. The later II variant has additional pins to make the bus wider but will work as a I if the devuce does not use them. Currently the U class is the same in both but in future it’s likely that II cards will support higher U classes that I cards cannot.

It is unfortunate that there are no standards around marking cards with maximum burst speeds as read is often much faster than write. The Panasonic card is being very clear, the SanDisk isn’t leading me to suspect that is actually a read speed.

Nevertheless on markings those are equivalent cards and the SanDisk likely the faster one and is certainly using the later UHS spec.

There are still very sensible reasons to stick with the cards that are marked in the manual as compatible, especially with early firmware in new devices and especially for paying jobs, but those tend to be due to unexpected interactions between card and device chipsets that often only surface in the field. After all the price difference is likely negligable compared to other costs unlike SD vs SxS.

Long term I strongly suspect a device like the GH4 will get a lot of testing by enthusiasts who will build up references of which other cards work well as in my experience manufacturers rarely update compatibility lists once the device is in market with stable firmware.

More detail on the speed standards at the SD Association, something everyone relying on SD cards for work should read https://www.sdcard.org/developers/overview/speed_class/

As an aside certainly for HD work I think SD cards are now cheap enough to treat them like tape used to be ie used once and then archived with the cost factored into the job. A fire safe of ‘originals’ at a different location to your mainline storage certainly makes sense.”

This is fine for testing the water or personal use but if you are a professional working with a paying customer don’t skimp on your media to save a few bucks.

If Panasonic tell you that you need UHS Speed Class 3 cards then thats what you use for 4K its that simple, anyone filming otherwise is a fool and remember it will come back to bite you when you least expect it if you don’t follow the simple rules.

For all your video production needs in Scotland, get in touch with Small Video Company Ltd