MPEG-4 files and sound

[Tim-Philipp Müller]

On Tue, 2018-12-25 at 11:29 +0000, Russel Winder wrote:

Hi Russel,

> I believe that will fail as the mp4mux appears not to have an AAC
> sink pad.

Here

  gst-inspect-1.0 mp4mux

shows:

  SINK template: 'audio_%u'
    Availability: On request
    Capabilities:
      ...
      audio/mpeg
            mpegversion: 4
          stream-format: raw
               channels: [ 1, 8 ]
                   rate: [ 1, 2147483647 ]

There is also a plugin for fdk-aac in gst-plugins-bad, but it looks
like it's not shipped by the debian packages at the moment.

Since this is a request pad you may have to create it (request it) in
your application explicitly.

Cheers
 Tim