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<TITLE> [Mageia-dev] cinelerra/audiokonverter/arista (war Re: rehashing the faac issue)
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<H1>[Mageia-dev] cinelerra/audiokonverter/arista (war Re: rehashing the faac issue)</H1>
<B>PhilippeDidier</B>
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TITLE="[Mageia-dev] cinelerra/audiokonverter/arista (war Re: rehashing the faac issue)">philippedidier at laposte.net
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<I>Thu Nov 1 21:01:23 CET 2012</I>
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<PRE>PhilippeDidier a écrit :
><i> Christiaan Welvaart a écrit :
</I>>><i> On Thu, 1 Nov 2012, PhilippeDidier wrote:
</I>>><i>
</I>>>><i> Christiaan Welvaart a écrit :
</I>>>>><i> On Wed, 31 Oct 2012, PhilippeDidier wrote:
</I>>>>><i>
</I>>>>>><i> I don't know actually how to create *.aac files or *.mp4 files with
</I>>>>>><i> Mageia... if you help me I will be happy...
</I>>>>><i>
</I>>>>><i> ffmpeg -i foo.mp3 -strict -2 -codec:a aac -format adts foo.aac
</I>>>>><i>
</I>>>>><i> But AFAIK this uses the ffmpeg internal aac codec which isn't very good.
</I>>>>><i> -codec:a libvo_aacenc produces garbage, no idea why
</I>>>>><i>
</I>>>>><i> About arista: someone decided to use the internal ffmpeg lib from
</I>>>>><i> gstreamer-ffmpeg for gstreamer0.10-ffmpeg which broke arista. Now arista
</I>>>>><i> must be ported to gstreamer1.0 .
</I>>><i>
</I>>>><i> You can understand, now, if you need to create aac or mpa or mp4 files :
</I>>>><i> that faac works
</I>>>><i> that softwares built with it work too
</I>>>><i> that nothing inside Mageia work (libvo_aacenc is really bad quality when
</I>>>><i> it doesn't produce garbages)
</I>>><i>
</I>>><i> It is a problem with the .aac file format combined with this codec. It
</I>>><i> works fine with bitrate 192kbit/s just not with anything lower. The
</I>>><i> codec also works with any bitrate when output to mp4 (aka quicktime
</I>>><i> movie) files. Or are you saying you do not like the audio quality of
</I>>><i> this codec?
</I>>><i>
</I>>>><i> What do you propose then ?
</I>>><i>
</I>>><i> Try it yourself and complain to ffmpeg developers if something you need
</I>>><i> doesn't work.
</I>>><i>
</I>>><i> There is now also fdk-aac which is supposed to be good. It has a special
</I>>><i> license that is somewhat similar to the GPL, may be compatible or not.
</I>>><i>
</I>>><i>
</I>It is not so clear :
<A HREF="http://opencore-amr.git.sourceforge.net/git/gitweb.cgi?p=opencore-amr/fdk-aac;a=blob;f=NOTICE">http://opencore-amr.git.sourceforge.net/git/gitweb.cgi?p=opencore-amr/fdk-aac;a=blob;f=NOTICE</A>
>><i> Christiaan
</I>>><i>
</I>><i> Yes fdk-aac replaces now vo-aacenc !
</I>><i> I'm trying to build a package for fdk-aac-0.1.0. ;)
</I>><i>
</I>><i>
</I>
I did it ...
Proposed a spec file and a patch
see bugzilla bug 7951
It may now be used for building ffmpeg (ready for this)
vlc (soon)
not yet for mplayer nor avidemux :(
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