broadcast online video

we have got a camera ,and we want to broadcast online wh开发者_Go百科at we record. how should we do it by php? we want to broadcast it on Ubuntu server! with spacial thanks for your attention. (if I can't ask my question well,I'm so sorry,my English is not so well - please don't click on - vote:D)

That really depends on the type of output available from your camera.
If you have an IP camera (one that connects directly to the network):
If the camera has a public IP address, all you need to do is find the manufacturer's instruction for embedding images in an HTML page (no PHP required).
If the camera does not have a public IP address, then you need to configure your router (a separate topic) to port forward the video from your camera, then just follow the manufacturer's instructions.

If you have a camera attached to your computer by USB (or similar), then you will need an encoder on your computer that can convert the incoming video (or mjpeg stream) to a format that is compatible with being embedded in an HTML page (still no PHP involved.)
The only encoder I have experience with is Microsoft Expression Encoder which is for a Windows server only, so I can't give you a recommendation about that for Ubuntu.

You can use PHP's Ming extension to create a player and playlist dynamically, but I am not sure why you would want to do that here.