video4linux stream sharing with a server daemon



Video devices currently can only be open by one process at a time. This makes it impossible to do necessary things like software auto-focus or recording video while using ekiga.


Last year Brandon presented on the need for a video4linux server and some details on how it might be done. This session will build on that initial discussion and will include details and research done by Hans and Brandon about specific approaches over the coming months before the conference.


video4linux, server, v4l, libv4l


  • Hansdegoede

    Hans de Goede



    I’ve been a FOSS developer for 10+ years. I started writing
    kernel drivers when I got a motherboard with an unsupported
    hardware monititoring IC (The Abit ┼│Guru).

    End 2007 I wanted to do something for the greater good of Linux,
    I decided to start working on webcam compatibility as many webcams
    did have drivers floating around, but of mixed quality and most
    where outside the mainline tree because they did decompression
    of various cam specific format inside the kernel which was not
    acceptable in the mainline kernel.

    So I started working on getting drivers into the mainline kernel,
    for which I soon joined forces with Jean-Francois Moine, who was at that time porting the usb webcam driver framework gspca to v4l2
    and cleaning it up for the mainline kernel, and started rewriting existing drivers using that framework.

    I’m probably best known in v4l land for libv4l, the userspace library I wrote to more or less transparently handle the decompression of many proprietary webcam video formats in userspace, fixing the decompression part of the problem.

  • Me


    Brandon is a Kernel developer at Novell/SuSE Labs. He has presented at several technical conferences in the past including FreedomHEC Taipei, Linux Plumbers Conf and Ignite Portland 2 . In his spare time he tinkers with electronics and software, bikes, hikes and builds robots. For more information checkout his site.

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