diff --git a/ts/Renderer/WebCodecsRendererCache.ts b/ts/Renderer/WebCodecsRendererCache.ts
index a5bf7feef..912a11255 100644
--- a/ts/Renderer/WebCodecsRendererCache.ts
+++ b/ts/Renderer/WebCodecsRendererCache.ts
@@ -76,7 +76,6 @@ export class WebCodecsRendererCache
       type: VideoStreamType.VideoStreamHigh,
       encodedFrameOnly: true,
     });
-    this._engine?.getMediaEngine().registerVideoEncodedFrameObserver(this);
   }
 
   public shouldFallback(frameInfo: EncodedVideoFrameInfo): boolean {
@@ -105,7 +104,6 @@ export class WebCodecsRendererCache
 
   public release(): void {
     logInfo('call_back_with_encoded_video_frame release');
-    this._engine?.getMediaEngine().unregisterVideoEncodedFrameObserver(this);
     this._decoder?.release();
     this._decoder = null;
     super.release();