Use this cinematography or projection calculation to plan image geometry, exposure, timing, storage, film footage, or presentation from explicitly stated camera and display parameters.

Total Bitrate Megabits Per Second (Mb/s)

Required number input.

Runtime Seconds (s)

Required number input.

Decimal gigabytes for a DCP or other constant-bitrate file from total Mb/s and running seconds; excludes filesystem overhead. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

File Gigabytes (GB)

The resulting file gigabytes returned as a number.

• Storage and bitrate estimates depend on codec, chroma sampling, bit depth, frame rate, audio, metadata, overhead, variable bitrate, compression settings, and DCP profile. Nominal rates do not predict image quality or exact package size.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Confirm critical values with the actual camera, lens, codec, projector, and delivery specification, then run a camera or projection test under representative conditions.

• DCP Bitrate

  Average total DCP bitrate in decimal Mb/s from decimal gigabytes and running seconds.

• File Size From Bitrate Runtime

  Decimal megabyte file size from constant total bitrate in Mb/s and runtime in seconds.

• Bitrate From File Size Runtime

  Average decimal megabits per second from a decimal megabyte file size and duration; includes any audio/container overhead already in the size.