diff --git a/README.md b/README.md
index 09ffb9d..334d6c6 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ for video.Read() {
 
 ## `Camera`
 
-The `Camera` can read from any cameras on the device running Vidio. It takes in the stream index. On most machines the webcam device has index 0. Note that audio retrieval from the microphone is not yet supported.
+The `Camera` can read from any cameras on the device running Vidio. It takes in the stream index. The index corresponds to the order in which the devices names appear when running `ffmpeg -list_devices true -f dshow -i dummy`. Alternative device names are included On most machines the webcam device has index 0. Note that audio retrieval from the microphone is not yet supported.
 
 ```go
 Name() string