use RTCEncodedVideoFrameType

Author: fippo

index.bs

@@ -382,6 +382,16 @@ interface RTCEncodedVideoFrame {
 <dl data-link-for="RTCEncodedVideoFrame"
         data-dfn-for="RTCEncodedVideoFrame"
         class="dictionary-members">
+    <dt>
+        <dfn>type</dfn> of type <span class="idlMemberType">RTCEncodedVideoFrameType</span>
+    </dt>
+    <dd>
+        <p>
+            The type attribute allows the application to determine when a key frame is being
+            sent or received.
+        </p>
+    </dd>
+
     <dt>
         <dfn>timestamp</dfn> of type <span class="idlMemberType">unsigned long</span>
     </dt>
@@ -603,7 +613,7 @@ The <dfn>generate key frame algorithm</dfn>, given |promise|, |encoder| and |rid
 For any {{RTCRtpScriptTransformer}} named |transformer|, the following steps are run just before any |frame| is enqueued in |transformer|.`[[readable]]`:
 1. Let |encoder| be |transformer|.`[[encoder]]`.
 1. If |encoder| or |encoder|.`[[pendingKeyFrameTasks]]` is undefined, abort these steps.
-1. If |frame| is not a video key frame, abort these steps.
+1. If |frame| is not a video {{RTCEncodedVideoFrameType/"key"}} frame, abort these steps.
 1. For each |task| in |encoder|.`[[pendingKeyFrameTasks]]`, run the following steps:
     1. If |frame| was generated by a video encoder identified by |task|.`[[rid]]`, run the following steps:
         1. Remove |task| from |encoder|.`[[pendingKeyFrameTasks]]`.