Data sizing is used for calculating the size of a video or movie. There a some calculation needed to be done before you can determine the size of a data. In order to calculate the size of a video, you must calculate the picture/frame rate of the video and the audio size.
Calculating the File Size of an Uncompressed Digital Video
- Raw video data size = frame size (width X height) * frame rate (fps) * colour depth (in bytes) * time (in seconds)
8 bits = 1 byte
1 kilo(bit/byte) = 1,024 (bits/bytes)
1 mega(bit/bytes) = 1,048,576 (bits/bytes)
1 giga(bit/bytes) = 1,073,741,824 (bits/bytes)
The formula is as follows
8-bit mono Seconds x kHz = Size
16 - bit mono (Seconds x kHz) x 2 = Size
8 - bit stereo (Seconds x kHz) x 2 = Size
16 - bit stereo ([Seconds x kHz] x 2) x 2 = Size
16 - bit 5.1 ([Seconds x kHz] x 2) x 6 = Size
Eg. The file size for a 30 seconds of 16-bit, 11kHz mono audio is: (30 X 11) X 2 = 660KB
Factors to consider when selecting graphics to be used in a multimedia project
- Purpose
- Quality
- Cost
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