How to obtain Audio tracks file size ?

[Kariboupseudo]

Hello,

I would like to encode some video files with muxed audio tracks in it but i just want the video to be encoded and keep the audio tracks as it is.

In order to calculate the appropriate bitrate for my encoder to proceed the video file i would like to know the audio tracks file size in my source file.

I thought it would be easy to figure it out but i can't find any tool who whould provide this basic information.
For exemple in Media Infos i've got the bitrate of the audio track but not the actual size in Mb.

I know that i could figure out the size by myself with the bitrate and the duration information but i'd like to know if there is a tool that provide the info directly please.

Thanks for your tips !

[jagabo]

As with video:

size = bitrate * running time

[Cornucopia]

Yes, and also, for LPCM audio raw streams:

bitrate = running time * samplerate * bitdepth * #channels

Scott

[Lowlander]

MediaInfo will give you the size of each individual stream. Be sure to select one of the more verbose output formats.

[Kariboupseudo]

Thanks, i didn't saw that mediainfo could be more verbose, that'll do the trick !
Cheers !