[MPlayer-users] to use b-frames with mencoder

[D Richard Felker III]

On Wed, Feb 12, 2003 at 02:59:02PM +0100, Betto Pinguino wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> hi, first at all sotty for my bad english
> a stupid question but b-frames with lavc are active by default or isn't?
> because in docs documents:
> 
> vmax_b_frames 0-4 (maximum number of B frames between non B frames)
> 	0 no b frames (default)
> 	0-2 is a sane range for mpeg4
> 
> and i think that is not active by default...but then there is this
> command line:
> 
> vb_strategy 0-1 for pass 2
> 	0 allways use the max number of B frames (default)
> 	1 avoid B frames in high motion scenes (this will cause bitrate
>           misprediction)

Umm what's the confusion here?? The default max bframes is 0, and the
default strategy is to always use the max. So if both are left at
default, it will always use 0. OK?

> so if i use this line i use or not b-frames?
> 
> mencoder -oac copy -o /mnt/divx/file_finale.avi -ovc lavc -lavcopts
> vcodec=mpeg4:vbitrate=10000:vhq:vpass=2:keyint=50 -vop
> scale=592:352,pp=0x20000 -mc 1 /mnt/divx/film.vob

It will not use b frames.

Rich