README.md

@@ -183,7 +183,6 @@ Valid top-level keys and their expected values are:
    video. Relative to `upload_dir`.
    Details under the heading [Slides](#slides).
 
-
 ### Subtitles
 
 There are two top-level keys that deal with subtitles: `subtitles` and
@@ -265,13 +264,18 @@ These are the valid keys for a source object:
    only have a `true` value for one stream per presentation. If omitted on
    stream creation, this will defauilt to `false`.
 
+ * `enabled`: `bool`  
+   Whether this stream will be displayed in the player. At least one stream
+   must be enabled. If omitted on stream creation, this will deafult to `true`.
+
 A `sources` object would look like this:
 ```json
 {
   "asourcename": {
     "video": "some/path",
     "poster": "some/other/path",
-    "playAudio": someBool
+    "playAudio": someBool,
+    "enabled": somebool,
   },
   "anothersource": {...},
   ...
@@ -377,12 +381,14 @@ This is a job specification that has all keys and values:
         "main": {
             "video": "videos/myvideo.mp4",
             "poster": "aposter.jpg",
-            "playAudio": true
+            "playAudio": true,
+            "enabled": true
         },
         "second": {
             "video": "myothervideo.mp4",
             "poster": "anotherposter.jpg",
-            "playAudio": false
+            "playAudio": false,
+            "enabled": false
         }
     },
     "slides": {
@@ -580,3 +586,7 @@ A source definition is a JSON object with the following keys:
  * `playAudio`: `bool`  
    A boolean value denoting whether to this stream's audio track. This will
    only be set to `true` for one source in a given package.
+
+ * `enabled`: `bool`
+   Whether this stream will be displayed in the player. At least one stream
+   will be enabled.