[FFmpeg-user] Get the file size in advance when encoding from one another format

[Bouke (Edit 'B)]

> 
> Please help me do this; How do I get the file size in advance if I encode
> any media format to another format so that I can set the Header
> Content-Length in the header. What is the formula for this? I'm new to
> FFMpeg.

Didn’t you already get flamed on this very subject not very long ago?

Bouke