[Asterisk-video] app_transcoder and videocalls

[Sergio Garcia Murillo]

  El 21/08/2010 0:24, João Serra escribió:
> Hi, currently playing with SofiaSIP library and i'm thinking in coding
> a video capable(via gstreamer) SIP UA for a Linux STB connected to a
> USB Webcam.
> However, all consumer-level webcams output only MJPEG video and i
> cannot afford to do any kind of video transcoding on the STB
> itself(the STB has a 300mhz mips cpu)
>
> So, can i use Asterisk with app_transcoder to transcode mjpeg
> videocalls to/from h263 or h264. Also, what delay will app_transcoder
> introduce?
>
> Thanks.
>
Hi Joao,

Currently app_transcoder does not support mjpeg decoder, it could 
support it easily, but you would also need to patch asterisk to support it.
The delay introduced by the app_transcoder is minumun, jsut the cpu time 
needed to decode and re-encode the frame, so it varies depending on the 
video codec, cpu and size of the frame.

Best regards
Sergio