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About 10MB/sec data rate for 4K recording
Panasonic GH4

4K: Data Rates/ Data Storage

The data rate for 4K (3840-wide) video at 30 fps is around 10 megabytes per second (80 megabits / sec). Other 4K recording options are very similar; a little more, a little less. A conservative figure for planning purposes might be 11 MB/sec, just to pad the estimate a bit and not run out of space.

Approximate storage for recording/archiving

It’s wise to budget for at least 20% more storage than you think you might need.

It is also wise to use a tool like diglloydTools DiskTester to prove out camera cards to be used for video work (bad bocks and such), such as with the fill-volume command, which provides a write/read-verify pass along with graphable output to show card performance (consistent or not). Use of a fast USB3 card reader is essential (far too slow with USB2).

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Diglloyd Guide to Mirrorless is by yearly subscription. Subscribe now for about 25 cents a day ($90/year).
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Diglloyd Guide to Mirrorless offers comprehensive integrated coverage of most APS-C and full frame mirrorless cameras and lenses.

Special emphasis is placed on Sony full-frame, including Sony lenses and the high performance Zeiss Batis and Zeiss Loxia lenses plus Rokinon/Samyang and others. Fujifilm X, Olympus and Panasonic M4/3, Sigma dp Merrill and dp/sd Quattro are also covered in depth. Years in the making, it offers a wealth of material for choosing and using a mirrorless camera.

  • Make better images by learning how to get the best results right away. For example, the best way to set up your Sony camera.
  • Save money by choosing the right lens for your needs the first time, particularly with the numerous lenses available for Sony.
  • Make better images, a sort of “cheat sheet” saving yourself months or years of ad-hoc learning—best practices and how-to and processing parameters are discussed and shown.
  • Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to 28 megapixels filling up to 5K display, plus large crops.
  • Real world examples with insights found nowhere else. Make sharper images just by understanding lens behavior you won’t read about elsewhere.
  • Aperture series from wide open through stopped down, showing the full range of lens performance and bokeh.
  • Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.

Want a preview? Click on any page below to see an excerpt as well as extensive blog coverage, for example on Sony.

OWC Thunderbay 4-bay Thunderbolt enclosure

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