[MEncoder-users] So does "target size" in xvid actually do anything?

[Etienne Buira]

Hi.

On Fri, Sep 16, 2011 at 06:37:42PM +0100, Padraig Hogan wrote:
>  %2==2 "C:\mencoder\mencoder" %1.btw -oac copy -ovc xvid -xvidencopts 
> bitrate=-1024000:threads=2 -vf scale=720:-2 -sub %filename:~0,-4%srt" 
  ^^^^^^^
That's not target size, but bitrate (bits per second)

> -utf8 -subfont-text-scale 2.7 -o %1.avi
> del %1.btw
> 
> But it still just completely ignores the 1024,000 kb and it comes out as 800mb.

If your movie is about 110 minutes long, then it is correct.

To target a particular file size, you have to calculate yourself the
bitrate (which is total number of seconds/total number of bits).

Look in your favourite search engine for "calculate bitrate".

> Now the original file is 1054,859kb encoded with 192k audio, so it's not as though xvid is saying it has no use of any extra bits to improve it at 
> all. 
> 
> I've had similar problems with it before. It's almost as though it doesn't even matter what size you put it, mencoder will just choose it's own size that's around 750mb for a typicalk movie. 
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