diff --git a/demos/real_time_stream_analysis/python/client.py b/demos/real_time_stream_analysis/python/client.py
index 00e76e6561..62e6ab9557 100755
--- a/demos/real_time_stream_analysis/python/client.py
+++ b/demos/real_time_stream_analysis/python/client.py
@@ -23,6 +23,8 @@
 
 parser = argparse.ArgumentParser()
 parser.add_argument('--grpc_address', required=False, default='localhost:9022', help='Specify url to grpc service')
+parser.add_argument('--ffmpeg_output_width', required=False, default=None, type=int, help='Width of the rtsp output channel window')
+parser.add_argument('--ffmpeg_output_height', required=False, default=None, type=int, help='Height of the rtsp output channel window')
 parser.add_argument('--input_stream', required=False, default="rtsp://localhost:8080/channel1", type=str, help='Url of input rtsp stream')
 parser.add_argument('--output_stream', required=False, default="rtsp://localhost:8080/channel2", type=str, help='Url of output rtsp stream')
 parser.add_argument('--model_name', required=False, default="holisticTracking", type=str, help='Name of the model')
@@ -54,6 +56,17 @@ def postprocess(frame, result):
     backend = StreamClient.OutputBackends.cv2
     exact = True
 
-client = StreamClient(postprocess_callback = postprocess, preprocess_callback=preprocess, output_backend=backend, source=args.input_stream, sink=args.output_stream, exact=exact, benchmark=args.benchmark, verbose=args.verbose)
+client = StreamClient(
+    postprocess_callback=postprocess,
+    preprocess_callback=preprocess,
+    output_backend=backend,
+    source=args.input_stream,
+    sink=args.output_stream,
+    exact=exact,
+    benchmark=args.benchmark,
+    verbose=args.verbose,
+    ffmpeg_output_width=args.ffmpeg_output_width,
+    ffmpeg_output_height=args.ffmpeg_output_height,
+)
 client.start(ovms_address=args.grpc_address, input_name=args.input_name, model_name=args.model_name, datatype = StreamClient.Datatypes.uint8, batch = False, limit_stream_duration = args.limit_stream_duration, limit_frames = args.limit_frames, streaming_api=True)