[MEncoder-users] Mencoder for iPod?

Aaron Digulla digulla at hepe.com
Sat Aug 26 20:10:13 CEST 2006

Jim Driscoll wrote:
> I create ipod Compatible Files with:
> -af volume=13:1 -aspect 16:9 -of lavf -lavfopts
> format=psp:i_certify_that_my_video_stream_does_not_use_b_frames  -oac lavc
> -ovc lavc -lavcopts
> aglobal=1:vglobal=1:coder=1:vcodec=mpeg4:acodec=aac:vbitrate=640:abitrate=12
> 8 -vf scale=374:214,crop=368:208:3:3,pp=fa,harddup -info name="": -ofps
> 24000/1001 
> The volume is in there for DVD sources.

I guess "-af volume=13:1" is to fix the low volume of most DVDs?

> And obviously this is for a 16:9 source.
> Mencoder doesn't seem to set the bit rate correctly for AAC when combined
> with h264 for ipods.  If someone knows how to get aac and h264 to work with
> JUST Mencoder please reply.

Does that mean your command above will produce broken files without
sound? Or only if I would replace "vcodec=mpeg4" with "vcodec=h264"?

> Change the mpeg4 to h264 and you have a PSP compatible file, OR you can add
> -srate 24000, but you can get higher quality audio on the PSP with h264.

:-/ Why do you specify "format=psp" in your example? Is this a typo?

Do I have to use -ofps 24000/1001 or can I also use 30fps or 25fps (for
PAL TV shows)? What are the limits of an iPod?


Aaron "Optimizer" Digulla a.k.a. Philmann Dark
"It's not the universe that's limited, it's our imagination.
Follow me and I'll show you something beyond the limits."

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