Formula
Capacity becomes bits, then hours:
hours = gigabytes × 1,000,000,000 × 8 / Mbps / 1,000,000 / 3,600
The file-size page is one recording. This page is the drive.
Assumptions
- The bitrate stays constant.
- The capacity is entirely available to video.
- Units are decimal.
Worked example
1,000 GB at 8 Mbps holds 277.78 h of video.
Input definitions
- Capacity
- Decimal gigabytes free for the recordings.
- Bitrate
- Megabits per second of the video you intend to store.
Limitations
This is a planning figure from the numbers you type. It is not a measurement of a network, a camera, a printer, or a power supply.
Questions
Where is a single file?
On the video file-size page, which multiplies one bitrate by one duration.
Does audio need its own bitrate?
Add it to the megabits before you type them, or use the recording-time page, which has a separate audio field.