User`s manual

17
AXIS 241Q/S/QA/SA - Video and Audio Streams
Other MPEG-4 clients
Although it may be possible to use other clients to view the MPEG-4 stream, it is not
guaranteed to work in all cases.
For some other clients, e.g. QuickTime™ the Video Object Type must be set to Simple. It
may also be necessary to adjust the advanced MPEG-4 settings.
To assess the video stream from e.g. QuickTime™ the following path can be used:
rtsp://<ip>/mpeg4/#/media.amp
This path is for all supported methods, and the client will negotiate with the Video Server
to determine exactly which transport protocol to use.
Notes: • <ip> = IP address.
• # = video source number or the quad stream. This is set to 1 if omitted.
Audio transmission methods
The audio stream can be accessed in the Live View page when viewing either Motion JPEG
or MPEG-4.
Using Motion JPEG
The basic transmission method of audio used in conjunction with Motion JPEG video
streaming is transmission over HTTP. The video and audio streams are not synchronized
when using Motion JPEG so the streams may be slightly out of sync. The latency in any
stream should be low, but this will depend on the network infrastructure.
Using MPEG-4
When using MPEG-4, audio is streamed using the same protocol as the video stream.
When audio is transmitted using MPEG-4, the Axis product sends synchronization
information along with the streams to the client that is performing the synchronization.
Note: Audio is streamed from the client to the server over HTTP when using Motion JPEG and MPEG-4.
Accessing the Audio Streams
In addition to accessing audio in the Live View page using AMC, audio from the Video
Server can also be accessed in the following ways:
HTTP-API
You can read about accessing audio for the other protocols through the HTTP-API at
http://www.axis.com/techsup
QuickTime/Windows Media Player
It is possible to use QuickTime and Windows Media Player to listen to the audio stream
using the same methods to access video streams.