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genlocking video on multiple PCs

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weka's picture

Nov 20, 2013 - 06:29am

  • Hi everyone,

    I'm looking for a way to have synchronous display refresh on multiple PCs. Looks like some guys already did some research and put it into a paper named Smart_Internet_Displays_DaaS.pdf

    But for me this quote from the paper seems not too encouraging concerning their results on PC Hardware:

    [quote]We have been able to modify the image dimensions (within any
    part of the total pixel area) as well as the pixelclock within the
    VBLANK pause using Intel integrated graphics platforms without
    resetting the whole display pipeline using Intel Linux graphics
    drivers [5]. But none of the tested displays tolerated ongoing modifications
    of image parameters without clearly visible artifacts.[/quote]

    Later they state, that the're using now a SetTopBox, where all the videoclocks are derived from a tuneable crystal oscillator - so they can tune the different oscillators on different boxes to sync.

    My Question: Does the intel hardware (or even better: the intel linux video drivers) provide anything similar to a fine tuneable clock - to be able to get multiple Displays connected to multiple PCs (e.g. NUCs, Zotacs,etc) in sync? It doesnt have to be pixel-exactly-genlock'ed; but in the long term (e.g. after some days of video playback) at least frame accurate...

    Every help would be appreciated.





    Nov 20, 2013 - 06:29am