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[Linphone-developers] Re: mediastreamer2 and --disable-libv4l problem

From: Simon Morlat
Subject: [Linphone-developers] Re: mediastreamer2 and --disable-libv4l problem
Date: Fri, 26 Mar 2010 14:37:30 +0100

Oops, sorry for the stupid mistake. It is now fixed in git tree.
For the information of everyone, libv4l is a user-space library provided
by the video4linux project. It should be used instead of directly
calling ioctl() mmap() etc directly to the driver.
The goal of this library is to perform all pixel-space and resizing
conversions in user space (rather than in the kernel, re-implemented in
each driver).
Linphone could do without it since it is already able to perform most
common pixel space conversions, however there are new camera drivers
that haven't been tested without libv4l, and they simply cause the
calling process to crash (because they don't support some of the
standart ioctls() the old drivers did).
That's why it is really strongly recommended to have libv4l installed
while compiling linphone.


Le vendredi 26 mars 2010 à 11:04 +0000, Aurelien Bouin a écrit :
> Hi,
> It seems like there is a problem when mediastreamer2 do not find the library 
> v4l(what is that actually ?I mean does could exists ?) and we try 
> to disable it by the configure in passing --disable-libv4l...
> I am attaching a patch for mediastreamer2 that solve the problem...
> Thanks,
> Aurélien BOUIN

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