[MPlayer-users] mencoder parameters for iPod

[Rolf Ernst]

On Thu, Feb 4, 2010 at 12:32 PM, Andrew Daviel <advax at triumf.ca> wrote:

>
> My daughter recently got an iPod Nano, which is supposed to be able to play
> movies. Unlike my Nokia N810, the only format it seems to play is the one
> generated by its own camera.
>
> Does anyone have mencoder parameters to transcode movies for the Nano ?
> From playing back one of the captures, the format seems to be
>  Audio: FAAD 44100 Hz, 2 ch, s16le
>  Video: FFmpeg H.264 640x480  24bpp  30.083 fps
> but I'm not sure how to turn that into the right parameters.
>

If I am not mistaken it will take x264, ,peg4, xvid, 320x240, 480x270,
480x320 and 640x480, bitrate 256, 512, 768, 1000, 1500, 2000 , frame rate 8,
10, 12, 15, 23.976, 24, 25, 29.97 and 30fps, aac 32-320, , 48, 44.1. 32, 24,
22.05, 11.025, 8Khz, 1 or 2 channel.

At least this is what my reference tells me.

You may have to specify certain profile parameters, though, which is what I
found a lot for these devices.

Here is an example of a command line which should work:

-mc 0 -af volnorm -vf scale=320:-2,expand=:240:::,crop=320:240,harddup
-srate 44100 -ofps 25 -oac faac -faacopts br=160:mpeg=4:object=2 -ovc x264
-ffourcc H264 -x264encopts
bitrate=512:level_idc=13:nocabac:no8x8dct:ref=2:me=umh:bframes=0:subq=6:trellis=0


If you need more details for a specific encode, let me know and I'll give
you the command line...

/re