confirmed issue #2935 is false report, set_bitrate was called, and

bandwidth has obvious change if you watch car game video

src/server/video_service.rs

@@ -498,7 +498,7 @@ fn run(sp: GenericService) -> ResultType<()> {
                 video_qos.target_bitrate,
                 video_qos.fps
             );
-            encoder.set_bitrate(video_qos.target_bitrate).unwrap();
+            allow_err!(encoder.set_bitrate(video_qos.target_bitrate));
             spf = video_qos.spf();
         }
         drop(video_qos);