I've got everything downsampling correctly, finally!
I downsample everything to the Ogg Vorbis format using the FFmpeg
utility. To do this, I first add the following line to the end of
the /etc/gnump3d/mime.types file. It must be at the end so that it
overrides any settings earlier in the file:
application/ogg ogg flac wav m4a mpc wma mp3
Here are my default downsampling commands. I've tested them with file
types ogg, flac, wav, m4a, mpc, wma, and mp3. (I need the '-ac 2' option
in there because I have several mono recordings and FFmpeg can only
encode Vorbis in stereo right now.)
downsample_high = ffmpeg -i $FILENAME -acodec vorbis -f ogg -ac 2
-ab 96k -
downsample_medium = ffmpeg -i $FILENAME -acodec vorbis -f ogg -ac 2
-ab 64k -
downsample_low = ffmpeg -i $FILENAME -acodec vorbis -f ogg -ac 2
-ar 22050 -ab 32k -
To simplify things, I made a patch so that you can include default
downsampling commands to your /etc/gnump3d/gnump3d.conf file (as shown
above). The code to do this is available on my Gnump3d web page at
http://waxandwane.org/view.cgi/gnump3d .
Cheers! -Ross
P.S. I still need to look more at the security issue Jim Lucas brought
up last week!
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