2006-05-19 09:28:05 +00:00
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Asterisk and Video telephony
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----------------------------
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Asterisk supports video telephony in the core infrastructure. Internally, it's one audio stream
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and one video stream in the same call. Some channel drivers and applications has video support,
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but not all.
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Codecs and formats
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------------------
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Asterisk supports the following video codecs and file formats. There's no video
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transcoding so you have to make sure that both ends support the same video format.
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Codec Format
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----- ----------
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H.263 read/write
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H.264 read/write
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H.261 - Passthrough only
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Note that the file produced by Asterisk video format drivers is in no generic
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video format. Gstreamer has support for producing these files and converting from
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various video files to Asterisk video+audio files.
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Note that H.264 is not enabled by default. You need to add that in the channel
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configuration file.
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Channel drivers
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---------------
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SIP The SIP channel driver (chan_sip.so) has support for video
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2006-06-21 20:14:25 +00:00
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IAX2 Supports video calls (over trunks too)
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2006-05-19 09:28:05 +00:00
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Local Forwards video calls as a proxy channel
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2006-06-21 20:14:25 +00:00
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Agent Forwards video calls as a proxy channel
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2008-07-01 16:14:28 +00:00
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oss Has support for video display/decoding, see video_console.txt
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2006-05-19 09:28:05 +00:00
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Applications
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------------
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This is not yet a complete list. These dialplan applications are known to handle video:
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voicemail Video voicemail storage (does not attach video to e-mail)
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record Records audio and video files (give audio format as argument)
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playback Plays a video while being instructed to play audio
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echo Echos audio and video back to the user
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There is a development group working on enhancing video support for Asterisk.
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If you want to participate, join the asterisk-video mailing list on http://lists.digium.com
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---
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2006-06-21 20:14:25 +00:00
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Updates to this file are more than welcome!
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