Two questions below there is the same Q+A, slightly rephrased.
Originally committed as revision 24320 to svn://svn.ffmpeg.org/ffmpeg/trunk
The standard MSys install doesn't come with pr. You need to get it from the coreutils package.
-@section I tried to pass RTP packets into a decoder, but it doesn't work.
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-RTP is a container format like any other, you must first depacketize the
-codec frames/samples stored in RTP and then feed to the decoder.
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@section Where can I find libav* headers for Pascal/Delphi?
see @url{http://www.iversenit.dk/dev/ffmpeg-headers/}