Calculator (convert): this form computes the average bitrate of a file based on the length of a video (or audio) file and the file size, in Kilobytes.
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Last Updated: Jan 30, 2005

< back to format/bitrate checking applications view test version of this page to check totals against actual files >
Length of video:
hours : minutes : seconds
: :
File size, in kilobytes
enter total file size in KB: no spaces, no commas
(e.g. 1206544, not 1,206,544)


onClick: do javascript function "showTotals"

Total Length of Video, in Seconds:
totalSeconds.value = secTotal
You indicated a file size of (KB)
totalKilobytes.value = bytetotal

this equals (after padding subtracted) (Kb).
totalKilobits.value = bittotal
Estimated padding stream size:
paddingEst.value = PaddingFixed + " KB";

This means your file has an approximate bitrate of for the audio and video combined.

The encoding used for the audio part of your file makes this number vary widely. The "combined stream" value should only be used to compare files that you know have the same audio encoding applied (for example, comparing two video files with the same length, each with MP2 audio, or each with AC-3 audio.

If we assume only one video stream and one audio stream, and no subpictures,
and we assume a constant bitrate of 384 Kbps for audio,
your video stream has
an approximate average bitrate of
kpbs

If we assume a constant bitrate of 192 Kbps for AC-3 (Dolby Digital) audio, your video stream has
an approximate average bitrate of
kpbs

< back to format/bitrate checking applications view test version of this page to check totals against actual files >