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[Linphone-developers] about linphone-1.1.x branch experimental H.263 vid
[Linphone-developers] about linphone-1.1.x branch experimental H.263 video support
Thu, 25 Aug 2005 01:06:07 +0200
I've worked a lot on video recently and could make a lot of progresses.
It works with H263 only and cameras that have a Video4Linux compatible kernel
This video support uses the excellent ffmpeg library for the video codecs
part, and the excellent SDL library for on screen output (with optimized yuv
You can try it now following this build procedure:
- download ffmpeg from http://ffmpeg.sf.net, compile with ./configure
--prefix=/usr --enable-shared && make && make install
- download SDL from http://www.libsdl.org, compile with
./configure --prefix=/usr--disable-static --disable-nasm && make &&
The --disable-nasm is to avoid a known SDL bug with nasm when
rendering YUV images.
- download lastest linphone>=1.1.x from
and build like this: ./configure --prefix=/usr
--disable-static --enable-video && make && make install
Normally it should start by displaying the local view from your camera (should
be /dev/video0 ) . If no camera is detected, thus it displays stranges
coloured moving squares (I used this artificial image to do test as I had
only one webcam).
The H.263 over rtp stuff was contributed a long time ago by some people hired
by 1control.com for an old release, and I finally integrated it to the main
Note there is NO control on the gui concerning video features: it will come in
Compatibility with other implementations has to be tested,
I haven't tested with linphonec, only linphone.
I think linphone should work with itself, with other sip video phones it's a
complete new problem...
I'm interested in any feedback, fixes or improvement you may do.
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