MPEG-4 files and sound

[David Ing]

I can't answer your question about the MPEG-4 and AC3, but I can tell you
that `gst-inspect-1.0 faac` finds nothing on my Ubuntu 18.04 system.
However it does find the "faad" plugin
here:  /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstfaad.so

One approach is to use the "avenc_aac" plugin instead.

If you really need "faac" then you can build gstreamer yourself using
gst-build, but you will need to install a couple of libraries before the
build.

   - libfaac-dev
   - libfaad-dev

You should also look at Thibault's suggestion for installing packages
before you run the build (OP =
https://s-opensource.org/author/thibaultsauniersamsungcom/).  He basically
suggests running this before you build:

sudo apt-get build-dep gstreamer1.0-plugins-{base,good,bad,ugly}


Once built you can copy libgstfaac.so into
/usr/lib/x86_64-linux-gnu/gstreamer-1.0 ... and it should just work (I
think).

On Sat, Dec 22, 2018 at 11:47 PM Russel Winder <russel at winder.org.uk> wrote:

> At the risk of exposing my ignorance publicly…
>
> I had thought that the MPEG-4 standard specified that AAC audio was
> supposed
> to be used, yet the mp4mux only seems to allow AC3. I tried using voaacenc
> instead of avenc_ac3 but it isn't allowed to be part of the pipeline,
> which on
> inspection of mp4mux makes sense, but is it right? (Should I be using
> avenc_ac3_fixed instead of avenc_ac3? What's fixed about it?)
>
> From what I can tell the faac encoder is not available in Debian packages
> even
> though the faad is. There doesn't seem to be a GStreamer plugin that works
> with fdk-aac, but is that a historical thing re licencing?
>
> --
> Russel.
> ===========================================
> Dr Russel Winder      t: +44 20 7585 2200
> 41 Buckmaster Road    m: +44 7770 465 077
> London SW11 1EN, UK   w: www.russel.org.uk
>
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