Merge pull request #5 from freddyaboulton/server-to-client-audio

Server to client audio

README.md

@@ -10,7 +10,7 @@ app_file: space.py
 ---
 
 # `gradio_webrtc`
-<img alt="Static Badge" src="https://img.shields.io/badge/version%20-%200.0.1%20-%20orange">  
+<a href="https://pypi.org/project/gradio_webrtc/" target="_blank"><img alt="PyPI - Version" src="https://img.shields.io/pypi/v/gradio_webrtc"></a>  
 
 Stream images in realtime with webrtc
 
@@ -358,6 +358,32 @@ float | None
 <td align="left"><code>None</code></td>
 <td align="left">None</td>
 </tr>
+
+<tr>
+<td align="left"><code>mode</code></td>
+<td align="left" style="width: 25%;">
+
+```python
+Literal["send-receive", "receive"]
+```
+
+</td>
+<td align="left"><code>"send-receive"</code></td>
+<td align="left">None</td>
+</tr>
+
+<tr>
+<td align="left"><code>modality</code></td>
+<td align="left" style="width: 25%;">
+
+```python
+Literal["video", "audio"]
+```
+
+</td>
+<td align="left"><code>"video"</code></td>
+<td align="left">None</td>
+</tr>
 </tbody></table>
 
 

backend/gradio_webrtc/utils.py

@@ -0,0 +1,63 @@
+import time
+import fractions
+import av
+import asyncio
+import threading
+from typing import Callable
+
+AUDIO_PTIME = 0.020
+
+
+def player_worker_decode(
+    loop,
+    callable: Callable,
+    stream,
+    queue: asyncio.Queue,
+    throttle_playback: bool,
+    thread_quit: threading.Event,
+):
+    audio_sample_rate = 48000
+    audio_samples = 0
+    audio_time_base = fractions.Fraction(1, audio_sample_rate)
+    audio_resampler = av.AudioResampler(
+        format="s16",
+        layout="stereo",
+        rate=audio_sample_rate,
+        frame_size=int(audio_sample_rate * AUDIO_PTIME),
+    )
+
+    frame_time = None
+    start_time = time.time()
+    generator = None
+
+    while not thread_quit.is_set():
+        if stream.latest_args == "not_set":
+            continue
+        if generator is None:
+            generator = callable(*stream.latest_args)
+        try:
+            frame = next(generator)
+        except Exception as exc:
+            if isinstance(exc, StopIteration):
+                print("Not iterating")
+                asyncio.run_coroutine_threadsafe(queue.put(None), loop)
+                thread_quit.set()
+            break
+
+        # read up to 1 second ahead
+        if throttle_playback:
+            elapsed_time = time.time() - start_time
+            if frame_time and frame_time > elapsed_time + 1:
+                time.sleep(0.1)
+        sample_rate, audio_array = frame
+        format = "s16" if audio_array.dtype == "int16" else "fltp"
+        frame = av.AudioFrame.from_ndarray(audio_array, format=format, layout="mono")
+        frame.sample_rate = sample_rate
+        for frame in audio_resampler.resample(frame):
+            # fix timestamps
+            frame.pts = audio_samples
+            frame.time_base = audio_time_base
+            audio_samples += frame.samples
+
+            frame_time = frame.time
+            asyncio.run_coroutine_threadsafe(queue.put(frame), loop)

backend/gradio_webrtc/webrtc.py

@@ -2,16 +2,20 @@
 
 from __future__ import annotations
 
+from abc import ABC, abstractmethod
 import asyncio
 from collections.abc import Callable, Sequence
 from typing import TYPE_CHECKING, Any, Literal, cast, Generator
-
+import fractions
+import threading
+import time
+from gradio_webrtc.utils import player_worker_decode
 
 from aiortc import RTCPeerConnection, RTCSessionDescription
 from aiortc.contrib.media import MediaRelay
-from aiortc import VideoStreamTrack
+from aiortc import VideoStreamTrack, AudioStreamTrack
 from aiortc.mediastreams import MediaStreamError
-from aiortc.contrib.media import VideoFrame  # type: ignore
+from aiortc.contrib.media import AudioFrame, VideoFrame  # type: ignore
 from gradio_client import handle_file
 import numpy as np
 
@@ -124,7 +128,6 @@ class ServerToClientVideo(VideoStreamTrack):
 
     async def recv(self):
         try:
-            
             pts, time_base = await self.next_timestamp()
             if self.latest_args == "not_set":
                 frame = self.array_to_frame(np.zeros((480, 640, 3), dtype=np.uint8))
@@ -132,17 +135,16 @@ class ServerToClientVideo(VideoStreamTrack):
                 frame.time_base = time_base
                 return frame
             elif self.generator is None:
-                self.generator = cast(Generator[Any, None, Any], self.event_handler(*self.latest_args))
+                self.generator = cast(
+                    Generator[Any, None, Any], self.event_handler(*self.latest_args)
+                )
 
             try:
                 next_array = next(self.generator)
             except StopIteration:
-                print("exception")
                 self.stop()
                 return
 
-            print("pts", pts)
-            print("time_base", time_base)
             next_frame = self.array_to_frame(next_array)
             next_frame.pts = pts
             next_frame.time_base = time_base
@@ -150,9 +152,132 @@ class ServerToClientVideo(VideoStreamTrack):
         except Exception as e:
             print(e)
             import traceback
+
             traceback.print_exc()
 
 
+class ServerToClientAudio(AudioStreamTrack):
+    kind = "audio"
+
+    def __init__(
+        self,
+        event_handler: Callable,
+    ) -> None:
+        self.generator: Generator[Any, None, Any] | None = None
+        self.event_handler = event_handler
+        self.current_timestamp = 0
+        self.latest_args = "not_set"
+        self.queue = asyncio.Queue()
+        self.thread_quit = threading.Event()
+        self.__thread = None
+        self._start: float | None = None
+        super().__init__()
+
+    def array_to_frame(self, array: tuple[int, np.ndarray]) -> AudioFrame:
+        frame = AudioFrame.from_ndarray(array[1], format="s16", layout="mono")
+        frame.sample_rate = array[0]
+        frame.time_base = fractions.Fraction(1, array[0])
+        self.current_timestamp += array[1].shape[1]
+        frame.pts = self.current_timestamp
+        return frame
+
+    async def empty_frame(self) -> AudioFrame:
+        sample_rate = 22050
+        samples = 100
+        frame = AudioFrame(format="s16", layout="mono", samples=samples)
+        for p in frame.planes:
+            p.update(bytes(p.buffer_size))
+        frame.sample_rate = sample_rate
+        frame.time_base = fractions.Fraction(1, sample_rate)
+        self.current_timestamp += samples
+        frame.pts = self.current_timestamp
+        return frame
+
+    def start(self):
+        if self.__thread is None:
+            self.__thread = threading.Thread(
+                name="generator-runner",
+                target=player_worker_decode,
+                args=(
+                    asyncio.get_event_loop(),
+                    self.event_handler,
+                    self,
+                    self.queue,
+                    False,
+                    self.thread_quit,
+                ),
+            )
+            self.__thread.start()
+
+    async def recv(self):
+        try:
+            if self.readyState != "live":
+                raise MediaStreamError
+
+            self.start()
+            data = await self.queue.get()
+            if data is None:
+                self.stop()
+                return
+
+            data_time = data.time
+
+            # control playback rate
+            if data_time is not None:
+                if self._start is None:
+                    self._start = time.time() - data_time
+                else:
+                    wait = self._start + data_time - time.time()
+                    await asyncio.sleep(wait)
+
+            return data
+        except Exception as e:
+            print(e)
+            import traceback
+
+            traceback.print_exc()
+
+    def stop(self):
+        self.thread_quit.set()
+        if self.__thread is not None:
+            self.__thread.join()
+            self.__thread = None
+        super().stop()
+
+        # next_frame = await super().recv()
+        # print("next frame", next_frame)
+        # return next_frame
+        # try:
+        # if self.latest_args == "not_set":
+        #     frame = await self.empty_frame()
+
+        #     # await self.modify_frame(frame)
+        #     await asyncio.sleep(100 / 22050)
+        #     print("next_frame not set", frame)
+        #     return frame
+        # if self.generator is None:
+        #     self.generator = cast(
+        #         Generator[Any, None, Any], self.event_handler(*self.latest_args)
+        #     )
+
+        # try:
+        #     next_array = next(self.generator)
+        #     print("iteration")
+        # except StopIteration:
+        #     print("exception")
+        #     self.stop()  # type: ignore
+        #     return
+        #     next_frame = self.array_to_frame(next_array)
+        #     # await self.modify_frame(next_frame)
+        #     print("next frame", next_frame)
+        #     return next_frame
+        # except Exception as e:
+        #     print(e)
+        #     import traceback
+
+        #     traceback.print_exc()
+
+
 class WebRTC(Component):
     """
     Creates a video component that can be used to upload/record videos (as an input) or display videos (as an output).
@@ -166,7 +291,9 @@ class WebRTC(Component):
 
     pcs: set[RTCPeerConnection] = set([])
     relay = MediaRelay()
-    connections: dict[str, VideoCallback | ServerToClientVideo] = {}
+    connections: dict[
+        str, VideoCallback | ServerToClientVideo | ServerToClientAudio
+    ] = {}
 
     EVENTS = ["tick"]
 
@@ -191,7 +318,8 @@ class WebRTC(Component):
         mirror_webcam: bool = True,
         rtc_configuration: dict[str, Any] | None = None,
         time_limit: float | None = None,
-        mode: Literal["video-in-out", "video-out"] = "video-in-out",
+        mode: Literal["send-receive", "receive"] = "send-receive",
+        modality: Literal["video", "audio"] = "video",
     ):
         """
         Parameters:
@@ -223,6 +351,9 @@ class WebRTC(Component):
             streaming: when used set as an output, takes video chunks yielded from the backend and combines them into one streaming video output. Each chunk should be a video file with a .ts extension using an h.264 encoding. Mp4 files are also accepted but they will be converted to h.264 encoding.
             watermark: an image file to be included as a watermark on the video. The image is not scaled and is displayed on the bottom right of the video. Valid formats for the image are: jpeg, png.
         """
+        if modality == "audio" and mode == "send-receive":
+            raise ValueError("Audio modality is not supported in send-receive mode")
+
         self.time_limit = time_limit
         self.height = height
         self.width = width
@@ -230,6 +361,7 @@ class WebRTC(Component):
         self.concurrency_limit = 1
         self.rtc_configuration = rtc_configuration
         self.mode = mode
+        self.modality = modality
         self.event_handler: Callable | None = None
         super().__init__(
             label=label,
@@ -268,9 +400,11 @@ class WebRTC(Component):
 
     def set_output(self, webrtc_id: str, *args):
         if webrtc_id in self.connections:
-            if self.mode == "video-in-out":
-                self.connections[webrtc_id].latest_args = ["__webrtc_value__"] + list(args)
-            elif self.mode == "video-out":
+            if self.mode == "send-receive":
+                self.connections[webrtc_id].latest_args = ["__webrtc_value__"] + list(
+                    args
+                )
+            elif self.mode == "receive":
                 self.connections[webrtc_id].latest_args = list(args)
 
     def stream(
@@ -296,9 +430,8 @@ class WebRTC(Component):
         )
         self.event_handler = fn
         self.time_limit = time_limit
-        
-        if self.mode == "video-in-out":
 
+        if self.mode == "send-receive":
             if cast(list[Block], inputs)[0] != self:
                 raise ValueError(
                     "In the webrtc stream event, the first input component must be the WebRTC component."
@@ -321,27 +454,29 @@ class WebRTC(Component):
                 time_limit=None,
                 js=js,
             )
-        elif self.mode == "video-out":
+        elif self.mode == "receive":
             if self in cast(list[Block], inputs):
                 raise ValueError(
-                    "In the video-out stream event, the WebRTC component cannot be an input."
+                    "In the receive mode stream event, the WebRTC component cannot be an input."
                 )
             if (
                 len(cast(list[Block], outputs)) != 1
                 and cast(list[Block], outputs)[0] != self
             ):
                 raise ValueError(
-                    "In the video-out stream, the only output component must be the WebRTC component."
+                    "In the receive mode stream, the only output component must be the WebRTC component."
                 )
             if trigger is None:
                 raise ValueError(
-                    "In the video-out stream event, the trigger parameter must be provided"
+                    "In the receive mode stream event, the trigger parameter must be provided"
                 )
             trigger(lambda: "start_webrtc_stream", inputs=None, outputs=self)
             self.tick(
-                self.set_output, inputs=[self] + inputs, outputs=None, concurrency_id=concurrency_id
+                self.set_output,
+                inputs=[self] + inputs,
+                outputs=None,
+                concurrency_id=concurrency_id,
             )
-            
 
     @staticmethod
     async def wait_for_time_limit(pc: RTCPeerConnection, time_limit: float):
@@ -350,6 +485,7 @@ class WebRTC(Component):
 
     @server
     async def offer(self, body):
+        print("starting")
         if len(self.connections) >= cast(int, self.concurrency_limit):
             return {"status": "failed"}
 
@@ -384,19 +520,31 @@ class WebRTC(Component):
             )
             self.connections[body["webrtc_id"]] = cb
             pc.addTrack(cb)
-        
-        if self.mode == "video-out":
+
+        if self.mode == "receive" and self.modality == "video":
             cb = ServerToClientVideo(cast(Callable, self.event_handler))
             pc.addTrack(cb)
             self.connections[body["webrtc_id"]] = cb
+            cb.on("ended", lambda: self.connections.pop(body["webrtc_id"], None))
+        if self.mode == "receive" and self.modality == "audio":
+            print("adding")
+            cb = ServerToClientAudio(cast(Callable, self.event_handler))
+            print("cb.recv", cb.recv)
+            # from aiortc.contrib.media import MediaPlayer
+            # player = MediaPlayer("/Users/freddy/sources/gradio/demo/audio_debugger/cantina.wav")
+            # pc.addTrack(player.audio)
+            pc.addTrack(cb)
+            self.connections[body["webrtc_id"]] = cb
+            cb.on("ended", lambda: self.connections.pop(body["webrtc_id"], None))
 
-
+        print("here")
         # handle offer
         await pc.setRemoteDescription(offer)
 
         # send answer
         answer = await pc.createAnswer()
         await pc.setLocalDescription(answer)  # type: ignore
+        print("done")
 
         return {
             "sdp": pc.localDescription.sdp,

demo/audio_out.py

@@ -0,0 +1,64 @@
+import gradio as gr
+import numpy as np
+from gradio_webrtc import WebRTC
+from twilio.rest import Client
+import os
+from pydub import AudioSegment
+
+
+
+account_sid = os.environ.get("TWILIO_ACCOUNT_SID")
+auth_token = os.environ.get("TWILIO_AUTH_TOKEN")
+
+if account_sid and auth_token:
+    client = Client(account_sid, auth_token)
+
+    token = client.tokens.create()
+
+    rtc_configuration = {
+        "iceServers": token.ice_servers,
+        "iceTransportPolicy": "relay",
+    }
+else:
+    rtc_configuration = None
+
+
+def generation(num_steps):
+    for _ in range(num_steps):
+        segment = AudioSegment.from_file("/Users/freddy/sources/gradio/demo/audio_debugger/cantina.wav")
+        yield (segment.frame_rate, np.array(segment.get_array_of_samples()).reshape(1, -1))
+
+
+css = """.my-group {max-width: 600px !important; max-height: 600 !important;}
+                      .my-column {display: flex !important; justify-content: center !important; align-items: center !important};"""
+
+
+with gr.Blocks(css=css) as demo:
+    gr.HTML(
+        """
+    <h1 style='text-align: center'>
+    Audio Streaming (Powered by WebRTC ⚡️)
+    </h1>
+    """
+    )
+    with gr.Column(elem_classes=["my-column"]):
+        with gr.Group(elem_classes=["my-group"]):
+            audio = WebRTC(label="Stream", rtc_configuration=rtc_configuration,
+                           mode="receive", modality="audio")
+            num_steps = gr.Slider(
+                label="Number of Steps",
+                minimum=1,
+                maximum=10,
+                step=1,
+                value=5,
+            )
+            button = gr.Button("Generate")
+
+        audio.stream(
+            fn=generation, inputs=[num_steps], outputs=[audio],
+            trigger=button.click
+        )
+
+
+if __name__ == "__main__":
+    demo.launch()

demo/video_out.py

@@ -0,0 +1,59 @@
+import gradio as gr
+from gradio_webrtc import WebRTC
+from twilio.rest import Client
+import os
+import cv2
+
+
+account_sid = os.environ.get("TWILIO_ACCOUNT_SID")
+auth_token = os.environ.get("TWILIO_AUTH_TOKEN")
+
+if account_sid and auth_token:
+    client = Client(account_sid, auth_token)
+
+    token = client.tokens.create()
+
+    rtc_configuration = {
+        "iceServers": token.ice_servers,
+        "iceTransportPolicy": "relay",
+    }
+else:
+    rtc_configuration = None
+
+
+def generation(input_video):
+    cap = cv2.VideoCapture(input_video)
+
+
+    iterating = True
+
+    while iterating:
+        iterating, frame = cap.read()
+
+        # flip frame vertically
+        frame = cv2.flip(frame, 0)
+        display_frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
+        yield display_frame
+
+with gr.Blocks() as demo:
+    gr.HTML(
+        """
+    <h1 style='text-align: center'>
+    Video Streaming (Powered by WebRTC ⚡️)
+    </h1>
+    """
+    )
+    with gr.Row():
+        with gr.Column():
+            input_video = gr.Video(sources="upload")
+        with gr.Column():
+            output_video = WebRTC(label="Video Stream", rtc_configuration=rtc_configuration,
+                           mode="receive", modality="video")
+            output_video.stream(
+                fn=generation, inputs=[input_video], outputs=[output_video],
+                trigger=input_video.upload
+            )
+
+
+if __name__ == "__main__":
+    demo.launch()

frontend/Index.svelte

@@ -6,6 +6,7 @@
 	import { StatusTracker } from "@gradio/statustracker";
 	import type { LoadingStatus } from "@gradio/statustracker";
 	import StaticVideo from "./shared/StaticVideo.svelte";
+	import StaticAudio from "./shared/StaticAudio.svelte";
 
 	export let elem_id = "";
 	export let elem_classes: string[] = [];
@@ -28,7 +29,8 @@
 	export let gradio;
 	export let rtc_configuration: Object;
 	export let time_limit: number | null = null;
-	export let mode: "video-in-out" | "video-out" = "video-in-out";
+	export let modality: "video" | "audio" = "video";
+	export let mode: "send-receive" | "receive" = "send-receive";
 
 	let dragging = false;
 
@@ -57,7 +59,7 @@
 		on:clear_status={() => gradio.dispatch("clear_status", loading_status)}
 	/>
 
-	{#if mode === "video-out"}
+	{#if mode === "receive" && modality === "video"}
 		<StaticVideo
 			bind:value={value}
 			{label}
@@ -67,7 +69,18 @@
 			on:tick={() => gradio.dispatch("tick")}
 			on:error={({ detail }) => gradio.dispatch("error", detail)}
 		/>
-	{:else}
+	{:else if mode == "receive" && modality === "audio"}
+		<StaticAudio
+			bind:value={value}
+			{label}
+			{show_label}
+			{server}
+			{rtc_configuration}
+			i18n={gradio.i18n}
+			on:tick={() => gradio.dispatch("tick")}
+			on:error={({ detail }) => gradio.dispatch("error", detail)}
+		/>
+	{:else if mode === "send-receive" && modality === "video"}
 		<Video
 			bind:value={value}
 			{label}

frontend/shared/AudioWave.svelte

@@ -0,0 +1,123 @@
+<script lang="ts">
+    import { onMount, onDestroy } from 'svelte';
+  
+    export let numBars = 16;
+    export let stream_state: "open" | "closed" = "closed";
+    export let audio_source: HTMLAudioElement;
+  
+    let audioContext: AudioContext;
+    let analyser: AnalyserNode;
+    let dataArray: Uint8Array;
+    let animationId: number;
+    let is_muted = false;
+  
+    $: containerWidth = `calc((var(--boxSize) + var(--gutter)) * ${numBars})`;
+
+    $: if(stream_state === "open") setupAudioContext()
+  
+    onDestroy(() => {
+      if (animationId) {
+        cancelAnimationFrame(animationId);
+      }
+      if (audioContext) {
+        audioContext.close();
+      }
+    });
+  
+    function setupAudioContext() {
+      console.log("set up")
+      audioContext = new (window.AudioContext || window.webkitAudioContext)();
+      analyser = audioContext.createAnalyser();
+      console.log("audio_source", audio_source.srcObject);
+      const source = audioContext.createMediaStreamSource(audio_source.srcObject);
+      source.connect(analyser);
+      analyser.connect(audioContext.destination);
+  
+      analyser.fftSize = 64;
+      dataArray = new Uint8Array(analyser.frequencyBinCount);
+  
+      updateBars();
+    }
+  
+    function updateBars() {
+      analyser.getByteFrequencyData(dataArray);
+      
+      const bars = document.querySelectorAll('.box');
+      for (let i = 0; i < bars.length; i++) {
+        const barHeight = (dataArray[i] / 255) * 2; // Amplify the effect
+        bars[i].style.transform = `scaleY(${Math.max(0.1, barHeight)})`;
+      }
+  
+      animationId = requestAnimationFrame(updateBars);
+    }
+  
+    function toggleMute() {
+        if (audio_source && audio_source.srcObject) {
+            const audioTracks = (audio_source.srcObject as MediaStream).getAudioTracks();
+            audioTracks.forEach(track => {
+            track.enabled = !track.enabled;
+            });
+            is_muted = !audioTracks[0].enabled;
+        }
+    }   
+
+  
+</script>
+  
+  <div class="waveContainer">
+    <div class="boxContainer" style:width={containerWidth}>
+      {#each Array(numBars) as _}
+        <div class="box"></div>
+      {/each}
+    </div>
+    <button class="muteButton" on:click={toggleMute}>
+      {is_muted ? '🔈' : '🔊'}
+    </button>
+  </div>
+  
+  <style>
+    .waveContainer {
+      position: relative;
+      display: flex;
+      flex-direction: column;
+      align-items: center;
+    }
+  
+    .boxContainer {
+      display: flex;
+      justify-content: space-between;
+      height: 64px;
+      --boxSize: 8px;
+      --gutter: 4px;
+    }
+  
+    .box {
+      height: 100%;
+      width: var(--boxSize);
+      background: var(--color-accent);
+      border-radius: 8px;
+      transition: transform 0.05s ease;
+    }
+  
+    .muteButton {
+      margin-top: 10px;
+      padding: 10px 20px;
+      font-size: 24px;
+      cursor: pointer;
+      background: none;
+      border: none;
+      border-radius: 5px;
+      color: var(--color-accent);
+    }
+  
+    :global(body) {
+      display: flex;
+      justify-content: center;
+      background: black;
+      margin: 0;
+      padding: 0;
+      align-items: center;
+      height: 100vh;
+      color: white;
+      font-family: Arial, sans-serif;
+    }

frontend/shared/StaticAudio.svelte

@@ -0,0 +1,126 @@
+<script lang="ts">
+	import { Empty } from "@gradio/atoms";
+	import {
+		BlockLabel,
+	} from "@gradio/atoms";
+	import { Music } from "@gradio/icons";
+	import type { I18nFormatter } from "@gradio/utils";
+	import { createEventDispatcher } from "svelte";
+    import { onMount } from "svelte";
+
+    import { start, stop } from "./webrtc_utils";
+    import AudioWave from "./AudioWave.svelte";
+
+
+    export let value: string | null = null;
+    export let label: string | undefined = undefined;
+    export let show_label = true;
+    export let rtc_configuration: Object | null = null;
+    export let i18n: I18nFormatter;
+    export let autoplay: boolean = true;
+    
+    export let server: {
+        offer: (body: any) => Promise<any>;
+    };
+
+    let stream_state = "closed";
+    let audio_player: HTMLAudioElement;
+    let pc: RTCPeerConnection;
+    let _webrtc_id = Math.random().toString(36).substring(2);
+
+
+    const dispatch = createEventDispatcher<{
+        tick: undefined;
+        error: string
+        play: undefined;
+        stop: undefined;
+	}>();
+
+
+    onMount(() => {
+        window.setInterval(() => {
+            if (stream_state == "open") {
+                dispatch("tick");
+            }
+        }, 1000);
+        }
+    )
+
+    $: if( value === "start_webrtc_stream") {
+        stream_state = "connecting";
+		value = _webrtc_id;
+		const fallback_config = {
+                iceServers: [
+                    {
+                        urls: 'stun:stun.l.google.com:19302'
+                    }
+                ]
+            };
+            pc = new RTCPeerConnection(rtc_configuration);
+            pc.addEventListener("connectionstatechange",
+                async (event) => {
+                   switch(pc.connectionState) {
+                        case "connected":
+                            console.log("connected");
+							stream_state = "open";
+                            break;
+                        case "disconnected":
+                            console.log("closed");
+							stop(pc);
+                            break;
+                        default:
+                            break;
+                   }
+                }
+            )
+		start(null, pc, audio_player, server.offer, _webrtc_id, "audio").then((connection) => {
+				pc = connection;
+			}).catch(() => {
+                console.log("catching")
+                dispatch("error", "Too many concurrent users. Come back later!");
+            });
+	}
+
+
+    
+</script>
+
+<BlockLabel
+	{show_label}
+	Icon={Music}
+	float={false}
+	label={label || i18n("audio.audio")}
+/>
+    
+<audio
+    class="standard-player"
+    class:hidden={value === "__webrtc_value__"}
+    on:load
+    bind:this={audio_player}
+    on:ended={() => dispatch("stop")}
+    on:play={() => dispatch("play")}
+/>
+{#if value !== "__webrtc_value__"}
+    <AudioWave audio_source={audio_player} {stream_state}/>
+{/if}
+{#if value === "__webrtc_value__"}
+	<Empty size="small">
+		<Music />
+	</Empty>
+{/if}
+
+
+<style>
+    :global(::part(wrapper)) {
+        margin-bottom: var(--size-2);
+    }
+
+    .standard-player {
+        width: 100%;
+        padding: var(--size-2);
+    }
+
+    .hidden {
+        display: none;
+    }
+</style>

frontend/shared/StaticVideo.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-	import { createEventDispatcher, afterUpdate, tick } from "svelte";
+	import { createEventDispatcher, onMount} from "svelte";
 	import {
 		BlockLabel,
 		Empty
@@ -29,15 +29,16 @@
 	}>();
 	
 	let stream_state = "closed";
-	window.setInterval(() => {
-        if (stream_state == "open") {
-            dispatch("tick");
-        }
-    }, 1000);
 
+	onMount(() => {
+		window.setInterval(() => {
+			if (stream_state == "open") {
+				dispatch("tick");
+			}
+   		}, 1000);
+		}
+	)
 
-
-	$: console.log("static video value", value);
 	$: if( value === "start_webrtc_stream") {
 		value = _webrtc_id;
 		const fallback_config = {
@@ -48,8 +49,7 @@
                 ]
             };
             const configuration = rtc_configuration || fallback_config;
-            console.log("config", configuration);
-            pc = new RTCPeerConnection(configuration);
+            pc = new RTCPeerConnection(rtc_configuration);
             pc.addEventListener("connectionstatechange",
                 async (event) => {
                    switch(pc.connectionState) {

frontend/shared/webrtc_utils.ts

@@ -27,17 +27,25 @@ export function createPeerConnection(pc, node) {
 	// connect audio / video from server to local
 	pc.addEventListener("track", (evt) => {
 		console.log("track event listener");
-		if (evt.track.kind == "video") {
+		if (node.srcObject !== evt.streams[0]) {
 			console.log("streams", evt.streams);
 			node.srcObject = evt.streams[0];
 			console.log("node.srcOject", node.srcObject);
+			if (evt.track.kind === 'audio') {
+				node.volume = 1.0;  // Ensure volume is up
+				node.muted = false;
+				node.autoplay = true;
+				
+				// Attempt to play (needed for some browsers)
+				node.play().catch(e => console.log("Autoplay failed:", e));
+			}
 		}
 	});
 
 	return pc;
 }
 
-export async function start(stream, pc, node, server_fn, webrtc_id) {
+export async function start(stream, pc: RTCPeerConnection, node, server_fn, webrtc_id, modality: "video" | "audio" = "video") {
 	pc = createPeerConnection(pc, node);
 	if (stream) {
 		stream.getTracks().forEach((track) => {
@@ -48,7 +56,7 @@ export async function start(stream, pc, node, server_fn, webrtc_id) {
 		});
 	} else {
 		console.log("Creating transceiver!");
-		pc.addTransceiver("video", { direction: "recvonly" });
+		pc.addTransceiver(modality, { direction: "recvonly" });
 	}
 
 	await negotiate(pc, server_fn, webrtc_id);