MPEG-4 files and sound
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MPEG-4 files and sound
 
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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 _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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Re: MPEG-4 files and sound
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Re: MPEG-4 files and sound
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On Sun, 2018-12-23 at 11:05 -0800, David Ing wrote:
> 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 This is what is strange. faac and faad are listed as plugins, but whilst faad is in Debian (and thus Ubuntu, Mint, etc.), faac appears not to be. > One approach is to use the "avenc_aac" plugin instead. I believe that will fail as the mp4mux appears not to have an AAC sink pad. However, I hadn't about that element, so good the read about. :-) Merry Christmas! -- 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 _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: MPEG-4 files and sound
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Re: MPEG-4 files and sound
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Re: MPEG-4 files and sound
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In reply to this post by David Ing
On Tue, 2018-12-25 at 08:31 -0800, David Ing wrote:
> Maybe try voaacenc > Trying that is what led me to discovering that mp4mux appears not to support AAC as an input format. AC3 seems to be working well, so this is not a Big Issue™ for me, it's mostly that the MPEG-4 standard seems to emphasise AAC, but the mp4mux doesn't seem to support it. I guess it is really me trying to ascertain if the problem is my misunderstanding or there is an issue with mp4mux. -- 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 _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: MPEG-4 files and sound
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In reply to this post by Tim-Philipp Müller-2
On Tue, 2018-12-25 at 18:30 +0100, Tim-Philipp Müller wrote:
> […] > > 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. It does seem like the faac and fdk-aac plugins are documented in the Debian Bad plugins packages, just not actually present. A tad frustrating I have to admit to be able to read about things that aren't actually there. But for the moment x264enc and avenc_ac3 are doing the job for me, so I am not blocked in any way. > Since this is a request pad you may have to create it (request it) in > your application explicitly. I saw the word "raw" and assumed it wasn't relevant. I guess I am just showing my lack of knowledge of the pad system! -- 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 _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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