[MEncoder-users] mencoder losing bits?

Jason Bodnar jason at shakabuku.org
Mon Apr 18 06:39:08 CEST 2005

On Wed, 13 Apr 2005 17:57:52 -0700, Corey Hickey wrote
> You're only using 1-pass encoding. With only one pass, mencoder's
> bitrate use is only an estimate based on vbitrate and what it thinks 
> it can use. If you use two or more passes (see the vpass= parameter) 
> mencoder knows how many bits to allocate to each frame in order to meet
> the target vbitrate.

Thank you. That seems to have worked.
> In general, you should always use more than one pass so that 
> mencoder is able to allocate bits more accurately.
> By the way, why are you using vcodec=msmpeg4v2 instead of mpeg4?
> vcodec=mpeg4 is better, unless you have some constraints with regard 
> to the playback software.

I'm building a test suite for our software so I have to encode a single clip
at a number of resolutions, bitrates and formats, one of which is msmpeg4v2.

Thanks again,


Jason Bodnar
jason at shakabuku.org

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