Trying to create Video iPod compatible videos, no audio :(

[Adz]

i'm using ffmpeg, windows build, to create mp4 files.

I think my settings are correct, and it produces an mp4 file with video and audio.

I'm using:

ffmpeg.exe -i input.mpg -vcodec xvid -b 150 -ar 48000 -acodec aac -ab 96 -s 320x240 -g 150 -qmin 10 -qmax 50 output.mp4

I can play the resulting file no problem with MPClassic.

Problem I have is once its on a video ipod, there is no audio.

I have tried bitrates from 32kbps to 128kbps, mono and stereo, different sample rates. It just doesnt want to know.

I've used mp4box to remux, this doesnt help either.

tried various different source files too, although this shouldnt matter.

The Video plays as expected.

Any help of this appreciated :)

[siddharthagandhi]

there are plenty of free ipod compatible encoders out there

just get one of them

i suggest veodora's one (google it)

[Adz]

needs to be command line, as I have to automate this on a windows web server :)

[smok3]

Adz, maybe some sort of wrong mpeg flag happens somewhere on the path, for fun you could try faac with something like, 4 example:

faac -b 128 --mpeg-vers 4 input.wav

and then mux that with mp4box, like:

mp4box -add "input.aac" "video.mp4"

[Adz]

worked a treat, thanks :)

[smok3]

cool, now you could also use itunes via itunesencode.exe:
http://rarewares.org/aac.html

(but if course this gets bulky since you have to have itunes installed..., the quality is better than faac thought.)