ProRes 422 Proxy storage requirements
One hour of ProRes 422 Proxy in UHD at 25p takes 67 GB. The table below runs the numbers for every common resolution and frame rate — including how many cards and how much backup volume a shoot day actually needs.
Footage Storage Calculator
- Footage per day
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- With all copies
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- Cards needed
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- Offload time (1 copy)
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Data rates: ProRes/DNxHR are per-frame constants from the Apple/Avid specs; RAW derives from resolution × bytes/pixel (nominal). Details further down this page.
ProRes 422 Proxy: GB per hour
ProRes 422 Proxy is per-frame constant (0.77 MB per UHD frame per the spec) — the data rate scales linearly with frame rate and pixel count. That is why 50p is exactly twice 25p, and 8K four times UHD.
| Resolution | 24p | 25p | 30p | 50p | 60p |
|---|---|---|---|---|---|
| HD 1920×1080 | 16 | 17 | 20 | 34 | 40 |
| UHD 3840×2160 | 65 | 67 | 81 | 135 | 162 |
| 4K DCI 4096×2160 | 69 | 72 | 86 | 144 | 173 |
| 6K 6144×3240 | 155 | 162 | 194 | 324 | 388 |
| 8K 8192×4320 | 276 | 288 | 345 | 575 | 690 |
From GB to a shoot day
A typical shoot day produces 2–4 hours of footage per camera. At ProRes 422 Proxy in UHD 25p that is 135–270 GB per camera — before copies. With 3-2-1 backup (three copies) it multiplies to 0.6 TB per three hours of material. The table runs three full shoot-day scenarios:
| Footage | Raw data | 1 TB cards | 3-2-1 volume | Offload per copy (400 MB/s) |
|---|---|---|---|---|
| 2 h | 135 GB | 1 | 0.39 TB | 6 min |
| 4 h | 270 GB | 1 | 0.79 TB | 12 min |
| 8 h | 539 GB | 1 | 1.58 TB | 23 min |
Planning offload and backup
Cards are the second calculation: the calculator on the main page derives card count from daily volume and card size — including the spare that stays locked while offloading.
In the schedule this number belongs in two places: as a card budget on the equipment list and as an offload window in the day plan. TillyGen keeps both in the same plan — change the shooting hours and the offload window moves with them.
Frequently asked
How much storage does 1 hour of ProRes 422 Proxy need?
In UHD at 25p: 67 GB. At 50p, double that. Every resolution is in the table above.
Are the numbers exact?
ProRes/DNxHR are specified target rates; real files land within a few percent. For capacity planning, use the nominal value plus 10 % headroom.