[Sugar-devel] mp3 etc.

Jerry Vonau jvonau at shaw.ca
Sat Aug 24 03:15:06 EDT 2013


On Sat, 2013-08-24 at 08:43 +0200, Tony Anderson wrote:
> Hi,
> 
> De facto, users can install the codecs as I understand it. The problem 
> is distribution.
> 
> The problem is not simple.
> 
> The following files are needed:
> 
> These two decode mp3
> 
> libgstmad.so
> libmad.so
> 
> These two decode AAC (the audio stream in mp4 video)
> 
> libgstfaad.so
> libfaad.so
> 
> 
> This handles the video.
> 
> gstreamer-ffmpeg-0.10.13-8.fc18.i686.rpm
> 
> The rpm is available freely and handles webm. This is one of the two 
> formats that IIAB used for the Khan Academy videos. Jukebox should 
> probably include webm support out of the box.
> 
> The other four are required to handle mp3 and mp4 (audio). They can be 
> obtained by installing the 'gstreamer ugly' rpm and then copying from
> /usr/lib and /usr/lib/gstreamer-0.10.
> 
> Including mime-types for these in the Jukebox activity even though the 
> codecs are not installed has no serious consequences. The Journal will 
> show an option to start a file but then simply doesn't play the file.
> 

Great feedback.

> However, a deployment can unzip the xo file, edit the mime-types, zip 
> (or use setup.py) the xo, and install from the modified xo file.
> 

I would suggest an increment to the activity_version by .1 to show that
the activity is revised.

Jerry

> Tony
> 
> 
> 
> On 08/24/2013 02:17 AM, Gonzalo Odiard wrote:
> > Part of the problem is legal.
> > OLPC or Fedora can't distribute legally software to play mp3 without
> > pay royalties. But in many countries in the world, the software patents
> > are not applicable, then, maybe you can install the software without
> > problem.
> > In the XO-4, the payment is already done, then is a issue solved,
> > but not in the older models.
> >
> > Gonzalo
> >
> 
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