[MEncoder-users] Re: quicktime compatible mp4 using x264encopts?

[Jon Drukman]

Jon Drukman wrote:
> Jon Drukman wrote:
>> here's what i have at the moment.  one thing to note is that sometimes 
>> it will still generate files that don't play in quicktime.  (they will 
>> play in other mp4/h.264 capable apps though)
> 
> one of my colleagues informs me that muxing with mp4creator (from the 
> mpeg4ip project) creates files that work in quicktime, although the 
> audio and video lose sync over time.

actually i've solved the a/v sync issue by specifying -ofps 29.97 in the 
mencoder command line.  previously i specified 30000/1001 and that 
caused the sync error.

so let's recap for the archives:

rm -f "$infile.264"

mencoder "$infile" -vf lavcdeint,scale=640:-10 -ovc x264 -x264encopts 
bitrate=1750 -ofps 29.97-nosound -of rawvideo -o "$infile.264"

rm -f "$infile.aac"

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

rm -f "$infile.mp4"

mp4creator -c "$infile.aac" "$infile.mp4"
mp4creator -rate 29.97 -c "$infile.264" "$infile.mp4"


you can of course change the vf and x264encopts options to mencoder to 
tradeoff picture quality/encoding time.  it should work just fine with 
no vf or x264encopts at all.