From 85988c579eb8156bb87a1915a27675af77744f7e Mon Sep 17 00:00:00 2001
From: cnderrauber <zengjie9004@gmail.com>
Date: Fri, 15 Dec 2023 10:30:28 +0800
Subject: [PATCH] Add receiver video mimeType to receiver stats (#963)

* Add mimeType to receiver stats

* changset
---
 .changeset/flat-bananas-obey.md    | 5 +++++
 src/room/stats.ts                  | 2 ++
 src/room/track/RemoteVideoTrack.ts | 8 ++++++++
 3 files changed, 15 insertions(+)
 create mode 100644 .changeset/flat-bananas-obey.md

diff --git a/.changeset/flat-bananas-obey.md b/.changeset/flat-bananas-obey.md
new file mode 100644
index 0000000000..65623f0f51
--- /dev/null
+++ b/.changeset/flat-bananas-obey.md
@@ -0,0 +1,5 @@
+---
+'livekit-client': patch
+---
+
+Add receiver video mime type to stats
diff --git a/src/room/stats.ts b/src/room/stats.ts
index 49d3c434ea..3ceb658419 100644
--- a/src/room/stats.ts
+++ b/src/room/stats.ts
@@ -106,6 +106,8 @@ export interface VideoReceiverStats extends ReceiverStats {
   nackCount?: number;
 
   decoderImplementation?: string;
+
+  mimeType?: string;
 }
 
 export function computeBitrate<T extends ReceiverStats | SenderStats>(
diff --git a/src/room/track/RemoteVideoTrack.ts b/src/room/track/RemoteVideoTrack.ts
index ffb2e355d3..9448fe9c17 100644
--- a/src/room/track/RemoteVideoTrack.ts
+++ b/src/room/track/RemoteVideoTrack.ts
@@ -169,8 +169,11 @@ export default class RemoteVideoTrack extends RemoteTrack {
 
     const stats = await this.receiver.getStats();
     let receiverStats: VideoReceiverStats | undefined;
+    let codecID = '';
+    let codecs = new Map<string, any>();
     stats.forEach((v) => {
       if (v.type === 'inbound-rtp') {
+        codecID = v.codecId;
         receiverStats = {
           type: 'video',
           framesDecoded: v.framesDecoded,
@@ -188,8 +191,13 @@ export default class RemoteVideoTrack extends RemoteTrack {
           bytesReceived: v.bytesReceived,
           decoderImplementation: v.decoderImplementation,
         };
+      } else if (v.type === 'codec') {
+        codecs.set(v.id, v);
       }
     });
+    if (receiverStats && codecID !== '' && codecs.get(codecID)) {
+      receiverStats.mimeType = codecs.get(codecID).mimeType;
+    }
     return receiverStats;
   }