Just how big are those files, anyway? | Gamma Ray Digital

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Just how big are those files, anyway?

Just how big are those files, anyway?

 

Since we upgraded our ScanStation to support resolutions up to 5k, we've received several emails about file sizes and data rates for these higher resolution scans. While the list below is by no means exhaustive (the scanner can create files at just about any dimensions or aspect ratio you might want), it gives you a good idea of the sizes of the files you could expect. These numbers assume a 24fps scan.

Resolution Format Duration File Size Data Rate
2k (2048x1556) 10 Bit DPX 1 Minute ~17 GB 300 MB/Second
  16 Bit DPX 1 Minute ~26 GB 450 MB/Second
  ProRes 422HQ 1 Minute ~2 GB 34 MB/Second
  ProRes 4444HQ 1 Minute ~3 GB 51 MB/Second
         
3.3k (3296x2464) 10 Bit DPX 1 Minute ~44 GB 763 MB/Second
  16 Bit DPX 1 Minute ~66 GB 1145 MB/Second
  ProRes 422HQ 1 Minute ~6 GB 105 MB/Second
  ProRes 4444HQ 1 Minute ~9 GB 157 MB/Second
         
UHD    (3840x2160) 10 Bit DPX 1 Minute ~45 GB 778 MB/Second
  16 Bit DPX 1 Minute ~67 GB 1166 MB/Second
  ProRes 422HQ 1 Minute ~6 GB 88 MB/Second
  ProRes 4444HQ 1 Minute ~8 GB 133 MB/Second
         
4k (4096x3112) 10 Bit DPX 1 Minute ~68 GB 1195 MB/Second
  16 Bit DPX 1 Minute ~102 GB 1790 MB/Second
  ProRes 422HQ 1 Minute ~10 GB 164 MB/Second
  ProRes 4444HQ 1 Minute ~15 GB 246 MB/Second

 

Bear in mind that ProRes, being a compressed format, will likely vary a bit in size from the numbers above. Different footage will compress differently, so your mileage may vary. The DPX numbers should be pretty spot-on. If there are resolutions you'd like to see listed here, just let us know.

One other thing, regarding data rates: to play these big DPX sequences, you're going to need a drive that can handle *at least* the data rate listed. For DPX, you'll want a RAID that can handle rates that are at least 50% faster. In most cases, ProRes files should play off of a single very fast disk, if it's connected to the computer with a nice quick interconnect method (eSATA, Thunderbolt, possibly USB3). But with higher resolutions, even ProRes might need a RAID.

Image Credit: Wikipedia User Redline Under Creative Commons License 3.0. Cropped and tweaked