Changes between Version 2 and Version 3 of RTPproxy/FAQ

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Timestamp:
03/14/09 16:25:15 (18 months ago)
Author:
sobomax
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  • RTPproxy/FAQ

    v2 v3  
    1111 
    1212In the RTP forwarding mode the RTPproxy is fully codec-agnostic, which means that it supports any voice/video codecs, including such royalty-based codecs as G.729 and G.723.1. It doesn't perform any encoding, decoding or transcoding, so that there is no need to posess a license. 
     13 
     14'''How can I extract audio from the recorded .pcap files?''' 
     15 
     16It is possible to extract audio using [http://xenion.reactive-search.com/?page_id=7 rtpbreak], sox and lame (for mp3). 
     17 
     18First, the conversion of each channel in the raw: 
     19 
     20{{{ 
     21rtpbreak -W -r longfilename_of_rtpproxy_record.a.rtp 
     22rtpbreak -W -r longfilename_of_rtpproxy_record.o.rtp 
     23}}} 
     24 
     25Then mix in the format wavpcm stereo: 
     26 
     27{{{ 
     28sox --combine merge -r 8k -A rtp.0.0.raw -r 8k -A rtp.1.0.raw -t wavpcm -s out.wav 
     29}}} 
     30 
     31and, finally, converting to mp3: 
     32 
     33{{{ 
     34lame out.wav out.mp3 
     35}}} 
    1336 
    1437== Performance ==