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BitCalc Pro

BitCalc Pro is a bitrate calculator app for Android. BitCalc Pro allows you to quickly calculate duration,...

$ 1.00

Store review

BitCalc Pro is a bitrate calculator app for Android.


BitCalc Pro allows you to quickly calculate duration, file size and bitrate
for video encoding projects. Specify two of the parameters and BitCalc Pro
will calculate the third. This allows you to calculate bitrate from duration
and file size, calculate file size from duration and bitrate or calculate
duration from file size and bitrate.


BitCalc Pro will also calculate bitrates for a specified resolution and frame
rate for various "bits per pixel" values. This allows you determine a good
starting point for a specific video if you are unsure what bitrate to try
first. The results are calculated for a range of 0.09 bits per pixel through
to 0.2 bits per pixel. These values are used by many well known media
broadcasters.

It allows you to change the units used for time (seconds, minutes and hours),
size (kilobyte, megabyte, gigabyte) and rate (kilobits per second, megabits
per second, gigabits per second).

The latest version added a "Resolution" tab which calculates resolutions with
a set aspect ratio where the X and Y dimensions are divisible by 4,8,16 or 32.
These resolutions often make for more efficient encodes where the X dimension
is a multiple of 4 (this varies with codec).

These calculations are vital when you are encoding video and need to determine
what bitrate or file size you need to specify in your encoding settings.

In order to keep the app simple but versatile it deals with bitrate as a
total. Remember that your total bitrate is a combination of your audio and
video bitrates. BitCalc Pro calculates a total bitrate which you must split
into video and audio as required. For example if you calculate a bitrate of
800kbs you must subtract your audio bitrate to determine your video bitrate.


Most video formats will also include some header information so the total file
size generated by your encoding process may be slightly different to that
shown in BitCalc Pro.


I would always recommend encoding a few versions of your video at various
bitrates so you can compare the results as there is no right or wrong answer
when it comes to selecting a bitrate. Ultimately you have to decide what is
acceptable and what the audience of your video is going to accept.

Last update

Feb. 15, 2013

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