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CGI Command Manual
15
3 Audio data request command
In terms of audio bit stream, the camera can also send it in the form of "HTTP bit stream", "RTP (UDP)
bit stream (unicast)" or "RTP (UDP) bit stream (multicast)" like MPEG-4 bit stream. You can refer to the
"Acquiring MPEG-4 bit stream" for the details of its sequence.
<Method>
GET
<Syntax>
http://ip_adr/audio
http://ip_adr/audio [?UdpMode=unicast&UdpPort=<UDP port number>]
http://ip_adr/audio [?UdpMode=multicast]
[HTTP bit stream]
The following example of response data shows how the HTTP bit stream will be acquired.
GET /audio HTTP/1.0¥r¥n
User-Agent: xxxxx¥r¥n
Host: 192.168.0.150¥r¥n
Accept: */*¥r¥n
Connection: Keep-Alive¥r¥n
¥r¥n
HTTP/1.0 200 OK¥r¥n
Content-Type: audio/16kadpcm¥r¥n
Cache-Control: no-cache¥r¥n
Pragma: no-cache¥r¥n
¥r¥n
<Audio data>
.
.
<Audio data>
In terms of <Audio data>, it is so-called raw data in the form of specified audio codec (G.711,G.726
(40kbps, 32kbps, 24kbps, 16kbps)). G.711 raw data complies with mu-law format.
[RTP bit stream (unicast)]
In terms of acquiring audio RTP bit stream (unicast), putting both UdpMode=unicast and UdpPort=<UDP
port number> parameters are required when it is requested via HTTP.