[MEncoder-users] Recoding RM files for iPod

[James Hastings-Trew]

Ulf Magnusson wrote:
> On Dec 26, 2007 11:10 PM, James Hastings-Trew <jimht at shaw.ca> wrote:
>   
>> Ulf Magnusson wrote:
>>     
>>>> ** MUXER_LAVF *****************************************************************
>>>> REMEMBER: MEncoder's libavformat muxing is presently broken and can generate
>>>> INCORRECT files in the presence of B frames. Moreover, due to bugs MPlayer
>>>> will play these INCORRECT files as if nothing were wrong!
>>>> ******************************************************************************
>>>>         
>> Try googling through the online archive of this mailing list - proper
>> "recipies" for ipod encoding have been posted here with fair regularity.
>>
>> _______________________________________________
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>> MEncoder-users at mplayerhq.hu
>> http://lists.mplayerhq.hu/mailman/listinfo/mencoder-users
>>
>>     
>
> I searched through the archive a bit before I posted. The problem is
> it's hard to get an overview of what's absolutely required for the
> conversion, and what of it is merely fine-tuning, especially since the
> commands are all quite complex. They also vary a lot. It'd be nice if
> there was an explanation of the bare minimum required, and some
> suggestions for further tweaking. I tried a few of the suggestions
> that don't depend on MP4Box or some other external mp4 muxers, but
> iTunes rejected them with the error I mentioned.
>   

iTunes won't download them to the ipod unless the "itunes" atom is set 
to the correct value. You can add the atom to the file with nicMP4Box ( 
http://nic.dnsalias.com/NicMP4Box.zip )

nicmp4box -add test.mp4 final.mp4

I've posted my own personal recipe for ipod encoding on the list before, but here it is again:

mencoder INPUT -sws 9 -of lavf -lavfopts format=mp4
/ -vf scale=576:320,dsize=576:320,harddup
/ -ovc x264
/ -x264encopts bitrate=1381:vbv_maxrate=1500:vbv_bufsize=2000:nocabac:me=umh:
/trellis=1:level_idc=30:global_header:threads=2:pass=1:turbo
/ -oac faac
/ -faacopts mpeg=4:object=2:br=160:raw -channels 2 -srate 48000 -o TEMP.mp4

mencoder INPUT -sws 9 -of lavf -lavfopts format=mp4
/ -vf scale=576:320,dsize=576:320,harddup
/ -ovc x264
/ -x264encopts bitrate=1381:vbv_maxrate=1500:vbv_bufsize=2000:nocabac:me=umh:
/subq=6:frameref=6:trellis=1:level_idc=30:global_header:threads=2:pass=2
/ -oac faac
/ -faacopts mpeg=4:object=2:br=160:raw -channels 2 -srate 48000 -o TEMP.mp4

nicmp4box -add TEMP.mp4 OUTPUT.mp4



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