AV (RCA) Cable in Ubuntu and Linux?

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http://askubuntu.com – So here's the thing: Few days ago, I bought a projector, and this projector has two entrances: 1) Mini USB 2) AV IN The mini USB only lets you connect an USB Drive via an adapter and read the data from it, you can't use it to connect your PC to the projector via USB cable, the projector doesn't recognize that connection as a usb device itself, The AV Connection uses a female RCA Cable like this one: http://bit.ly/HrV0KV (The small black one goes to the projector and the other three females are free) So what I tried basically was to connect that cable to the projector and then used thi (HowTos)