[MPlayer-users] Why create video in 1st pass?

[Kichigai Mentat]

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On Nov 24, 2005, at 03.34, Stefan Sassenberg wrote:

> Mustafa Abbasi wrote:
>> oh crap.
>> is this why everytime i enabled 2 pass it created a video file.
>> i asummed i was doing something wrong so i did not use 2 pass
>> damn. why is this not mentioned in the man pages clearly.
> The documentation says "you can delete the AVI" which implies that  
> there is an AVI created in the first pass. And you can delete it.
Why even do that much work? Why not output directly to /dev/null?  
Saves time and space, since (I'm assuming by now we've tweaked  
everything) we don't need the 1st pass output file?

I generally just use, once I'm satisfied, a command like this:
$ mencoder <input> -o /dev/null -ovc lavc -oac null -lavcopts  
vcodec=mpeg4:vbitrate=<appropriate bitrate>:vpass=1:<all other  
options> && cp divx2pass.log (or whatever the file's called)  
divx2pass.pass1 && mencoder <input> -o <output> -ovc lavc -oac null - 
lavcopts vcodec=mpeg4:vbitrate=<appropriate bitrate>:vpass=2:<all  
other options>

And that can easily be modified for three (or more) pass encoding  
too. Then, you can just let your system sit over night, while at  
work, off wherever, and produce the video you want. Of course, this  
only works if you've already tweaked your options.
>
> But never mind. For you, mplayer has just improved significantly  
> without doing any work :-)
>
> Stefan
>
>
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