H.264 ALL-I 400 Mbit/s storage requirements
One hour of H.264 ALL-I 400 Mbit/s in UHD at 25p takes 176 GB. The table below runs the numbers for the nominal bitrate 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.
H.264 ALL-I 400 Mbit/s: GB per hour
H.264 ALL-I 400 Mbit/s is bitrate-based: data volume follows the configured bitrate, not the resolution. The numbers use the preset's nominal rate.
| Resolution | 24p | 25p | 30p | 50p | 60p |
|---|---|---|---|---|---|
| UHD 3840×2160 | 169 | 176 | 211 | 352 | 422 |
From GB to a shoot day
A typical shoot day produces 2–4 hours of footage per camera. At H.264 ALL-I 400 Mbit/s in UHD 25p that is 352–703 GB per camera — before copies. With 3-2-1 backup (three copies) it multiplies to 1.5 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 | 352 GB | 1 | 1.03 TB | 15 min |
| 4 h | 703 GB | 1 | 2.06 TB | 30 min |
| 8 h | 1.37 TB | 2 | 4.12 TB | 1 h 0 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 H.264 ALL-I 400 Mbit/s need?
In UHD at 25p: 176 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.