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RTP clarifications
Originally committed as revision 9722 to svn://svn.ffmpeg.org/ffmpeg/trunk
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doc/faq.texi
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doc/faq.texi
@ -406,10 +406,8 @@ The standard MSys bash (2.04) is broken. You need to install 2.05 or later.
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@section I tried to pass RTP packets into a decoder, but it doesn't work.
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Of course not, you MUST strip ALL RTP headers and assemble valid packets
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first, an MP3 decoder decodes MP3 packets not bastardized MP3 packets
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encapsulated in RTP. The same applies to all decoders, this is not specific
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to ffmpeg or libavcodec.
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RTP is a container format like any other, you must first depacketize the
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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?
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@ -419,12 +417,10 @@ see @url{http://www.iversenit.dk/dev/ffmpeg-headers/}
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see @url{http://svn.mplayerhq.hu/michael/trunk/docs/}
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@section how do I feed H.263-RTP (and likely other RTP bastardizations of codecs) to libavcodec?
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@section how do I feed H.263-RTP (and other codecs in rtp) to libavcodec?
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Remove _ALL_ RTP trash and either feed the fragments through an AVParser and
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then into the decoder or merge the fragments yourself into proper frames and
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feed them into the decoder. Note: The payload of H.263-RTP is not valid
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H.263 you at least have to merge the first and last bytes discarding RTP trash
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from them, possibly more. Also look at rfc 4629.
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Even if peculiar since it is network oriented, RTP is a container like any
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other. You have to DEMUX RTP before feeding the payload to libavcodec.
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In this specific case please look at rfc 4629 to see how it should be done.
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@bye
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