<div dir="ltr"><div dir="ltr"><div dir="ltr">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</div><div dir="ltr"><br></div><div>One approach is to use the "avenc_aac" plugin instead.</div><div><br></div><div>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.</div><div><ul><li>libfaac-dev</li><li>libfaad-dev</li></ul><div>You should also look at Thibault's suggestion for installing packages before you run the build (OP = <a href="https://s-opensource.org/author/thibaultsauniersamsungcom/">https://s-opensource.org/author/thibaultsauniersamsungcom/</a>). He basically suggests running this before you build:</div></div></div><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div dir="ltr"><div><span style="color:rgb(26,26,26);font-family:Inconsolata,monospace">sudo apt-get build-dep gstreamer1.0-plugins-{base,good,bad,ugly}</span></div></div></blockquote><div><br></div><div>Once built you can copy libgstfaac.so into /usr/lib/x86_64-linux-gnu/gstreamer-1.0 ... and it should just work (I think).<br></div></div><br><div class="gmail_quote"><div dir="ltr">On Sat, Dec 22, 2018 at 11:47 PM Russel Winder <<a href="mailto:russel@winder.org.uk">russel@winder.org.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">At the risk of exposing my ignorance publicly…<br>
<br>
I had thought that the MPEG-4 standard specified that AAC audio was supposed<br>
to be used, yet the mp4mux only seems to allow AC3. I tried using voaacenc<br>
instead of avenc_ac3 but it isn't allowed to be part of the pipeline, which on<br>
inspection of mp4mux makes sense, but is it right? (Should I be using<br>
avenc_ac3_fixed instead of avenc_ac3? What's fixed about it?)<br>
<br>
>From what I can tell the faac encoder is not available in Debian packages even<br>
though the faad is. There doesn't seem to be a GStreamer plugin that works<br>
with fdk-aac, but is that a historical thing re licencing?<br>
<br>
-- <br>
Russel.<br>
===========================================<br>
Dr Russel Winder t: +44 20 7585 2200<br>
41 Buckmaster Road m: +44 7770 465 077<br>
London SW11 1EN, UK w: <a href="http://www.russel.org.uk" rel="noreferrer" target="_blank">www.russel.org.uk</a><br>
<br>
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</blockquote></div>