First of all, I need to be able to buy my Raspberry

Thanks a lot for your very detailed answer.

I will post when my basic solution is ready (monochrome probably).

Thanks everybody.

You can see a diagram of what I try to explain here : http://flic.kr/p/bJSXXp

<t>tufty said: <br/> <br/> <br/> It's not a question of possible or impossible.  With an external genlock or video mixer, what you want to do is 100% possible using the Pi to generate video.  Unfortunately, external professional quality genlock / video mixer systems cost significant amounts of money...

<t>I'd like to make an OSD like this video shows.<br/> <br/> All graphics (text, lines, circles, animation, and so on) would be made by RaspBerry.<br/> <br/> Need to mix those graphics with live video coming from the video camera.<br/> <br/> Video composite signal is made of frames (look at wikipedi...

<t>Thanks for your answer, I already know LM1881.<br/> <br/> I used it with a dsPIC (for fine resolution).<br/> <br/> So, as I told earlier, I know how to do with dsPIC or µC and a LM1881.<br/> <br/> But it might be simpler if there is no extra electronic components.<br/> <br/> You answered "not Ras...

<t>Thanks for your answers.<br/> <br/> But those solutions are too much expensive.<br/> <br/> Few weeks ago, I programmed a dsPIC (a few dollars) that was able to add pixels on a live video (draw pixels, lines, circles, etc). Difficulty is to be synchronized with cam video frames.<br/> <br/> Some ci...

<t>I do know this. This is the reason why I spoke about USB Audio/Video converter in my first message (that is a USB video in).<br/> <br/> But this solution (using USB converter) maybe not the best one (in term of video processing time).<br/> <br/> This is why I spoke about another solution which ai...

Sorry, I did not answer previously : yes, it is live video.

I'd like to create text and graphism (circles, lines, animation) that would be surimpose on the camera video.

<t>In fact, I only need to surimpose pixels (monochrome is okay, colors would be better) on my video composite signal coming from the camera.<br/> <br/> 680 pounds is impossible.<br/> <br/> I know a few components would be enough (like a dsPIC), but it needs time to develop it although a trick may e...

<t>Hi,<br/> <br/> I need to make a screen overlay on video composite signal coming from a camera.<br/> <br/> All graphics would be made with Pi.<br/> <br/> But how to make overlay ?<br/> <br/> I can see two posibilites :<br/> <br/> 1/- use a USB AV converter, add overlay by software and use Video co...