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[libvirt] VNC Server in libvirt

My name is Jaime Loureiro and I work in the Network & Applications area in University of Vigo. I am writing to you hoping you can help me with some libvirt graphics issues.

I was analysing the source code of the libvirt in order to find how to access the display of each virtual machine. We are trying to generate a video streaming from the graphics content, though it is not easy to find what function is the most appropriate to do that. We tried to use the screenshot feature, but the rate is to low to generate a smooth streaming. I suposse the vnc server is reading the graphics output of each virtual machine at a low level, however I cannot find the exact point where the server is.  Currently I am trying to understand the function "virDomainOpenGraphics" in libvirt.c and, at a lower level, the function "qemuProcessHandleGraphics" in qemu_process.c, but I 'm not sure if it is possible to get what we need from them. 

I would appreciate any help or clue you could provide regarding this issue.

Thank you very much in advance.

Best regards,

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