[MEncoder-users] Re: mp4/h264 encoding status

[Jon Drukman]

Jeff Clagg wrote:
> On Tue, Oct 31, 2006 at 10:44:22AM -0800, Jon Drukman wrote:
>> (if someone can figure out how to use mencoder to 
>> generate just an .aac audio stream (no video) then you can replace the 
>> ffmpeg step with that and save yourself compiling yet another app.)
> 
> -of rawaudio

yeah, with this command line:

mencoder "$infile" -of rawaudio -o audio.aac -oac faac -ovc copy

the resulting muxed mp4 doesn't play in QuickTime.  i don't know what 
ffmpeg does differently but i haven't had luck with aac streams 
generated by mencoder or the faac command line interface.

here's the ffmpeg command (which works):

ffmpeg -y -i "$1" -vn -f aac -ar 48000 -ab 128 -coder 0 -ac 2 -acodec 
aac audio.aac

-jsd-