Updated Usage and examples (markdown)

Usage-and-examples.md

@@ -1,11 +1,85 @@
-**In-progress**
-
 # Listening to events
 
+You can keep reading the global virtual camera events like device add, removal, and default picture changes with:
+
+```
+AkVCamManager listen-events
+```
+
+To stop listening to events, press Ctrl-C to stop the manager.
+
 # Virtual camera clients
 
+You can list all programs using the virtual camera with:
+
+```
+AkVCamManager clients
+```
+
+It will return a list of PIDs and the path of the executable using it.
+
 # Examples
 
+## Streaming
+
+The manager can read the raw video frames stream from the standard input as:
+
+```
+frame_producer_program | AkVCamManager stream AkVCamVideoDevice0 INPUT_FORMAT WIDTH HEIGHT
+```
+
 ## Streaming with FFmpeg
 
+You can stream to the virtual camera with:
+
+```
+ffmpeg -i video.webm -pix_fmt rgb24 -f rawvideo - | AkVCamManager stream AkVCamVideoDevice0 RGB24 480 360
+```
+
+The input format must be one of the supported ones, you can list them with:
+
+```
+AkVCamManager supported-formats --input
+```
+
+Since the manager will send the frames as fast as FFmpeg decode them, you can regulate the stream passing the **--fps** flag to set the input stream frame rate.
+
+```
+ffmpeg -i video.webm -pix_fmt rgb24 -f rawvideo - | AkVCamManager stream --fps 30 AkVCamVideoDevice0 RGB24 480 360
+```
+
 ## Capturing
+
+Any capture program will work just fine, here is an example with ffplay:
+
+**Mac**
+
+First at all you must list all AVFoundation devices:
+
+```
+ffmpeg -f avfoundation -list_devices true -i dummy
+```
+
+Then, once you in which DEVICE_INDEX is located your virtual camera, you can ply it with:
+
+```
+ffplay -f avfoundation -i DEVICE_INDEX -framerate 30
+```
+
+If you have any question, read the [FFmpeg's wiki](https://trac.ffmpeg.org/wiki/Capture/Webcam#AVFoundation).
+
+**Windows**
+
+First at all you must list all DirectShow devices:
+
+```
+ffmpeg -f dshow -list_devices true -i dummy
+```
+
+Then, play the virtual camera by it's name:
+
+```
+ffplay -f dshow -i video="Virtual Camera"
+```
+
+If you have any question, read the [FFmpeg's wiki](https://trac.ffmpeg.org/wiki/DirectShow).