enhanced com

src/bot/audioProcedure.ts

@@ -105,12 +105,18 @@ export class AudioProcedure {
           }
         })();
         const rr: any = r || {};
+        const vsArr = (rr.videoStats || []) as any[];
+        const vs = vsArr.length
+          ? vsArr.map(v => `${v.kind}:b=${v.bytes},p=${v.packets},fEnc=${v.framesEncoded},fSent=${v.framesSent},fps=${v.fps},${v.w}x${v.h}`).join(' | ')
+          : 'none';
         parts.push(
           `[${shortUrl}] r=${rr.replaced ?? 0} add=${rr.added ?? 0} pcs=${rr.pcs ?? 0} `
           + `tx=${rr.totalTransceivers ?? 0} vidTx=${rr.videoTransceivers ?? 0} `
           + `vidWith=${rr.videoSendersWithTrack ?? 0} vidNoTrack=${rr.videoSendersWithoutTrack ?? 0} `
           + `dirB=[${(rr.directionsBefore || []).join(',')}] dirA=[${(rr.directionsAfter || []).join(',')}] `
-          + `${rr.reason || ''}`.trim(),
+          + `cd=[${(rr.currentDirections || []).join(',')}] `
+          + `track=${rr.trackId || 'n/a'}(en=${rr.trackEnabled},rs=${rr.trackReady},mu=${rr.trackMuted}) `
+          + `vstats=[${vs}] ${rr.reason || ''}`.trim(),
         );
       } catch (e: any) {
         parts.push(`err=${String(e?.message || e).slice(0, 64)}`);

src/bot/mediaGetUserMediaPatch.ts

@@ -19,12 +19,20 @@ export const poweronMediaPatchInstall = (opts: MediaGetUserMediaPatchOptions) =>
     w.__gumChromium = (navigator.mediaDevices as any).getUserMedia.bind(navigator.mediaDevices);
   }
 
-  // Patch RTCPeerConnection.prototype methods once per realm to observe + react to Teams' track placement.
+  // Patch RTCPeerConnection.prototype methods once per realm to observe Teams'
+  // track placement + SDP negotiation. We DO NOT modify any tracks here; gUM
+  // already returns the canvas video track to Teams, so the right track is
+  // placed on the sender automatically. We only OBSERVE so we can diagnose
+  // what Teams does (or fails to do).
   if (!w.__poweronRtcPatched && (window as any).RTCPeerConnection) {
     w.__poweronRtcPatched = true;
     const RTCProto: any = (window as any).RTCPeerConnection.prototype;
     const _origAddTrack = RTCProto.addTrack;
     const _origAddTransceiver = RTCProto.addTransceiver;
+    const _origRemoveTrack = RTCProto.removeTrack;
+    const _origReplaceTrackProto = (window as any).RTCRtpSender?.prototype?.replaceTrack;
+    const _origSetLocalDescription = RTCProto.setLocalDescription;
+    const _origSetRemoteDescription = RTCProto.setRemoteDescription;
     RTCProto.addTrack = function (track: MediaStreamTrack, ...streams: MediaStream[]) {
       try {
         // eslint-disable-next-line no-console
@@ -36,28 +44,16 @@ export const poweronMediaPatchInstall = (opts: MediaGetUserMediaPatchOptions) =>
       } catch {
         // ignore
       }
-      let useTrack: MediaStreamTrack = track;
+      const sender = _origAddTrack.call(this, track, ...streams);
       try {
         if (useCanvasVideo && track && track.kind === 'video') {
-          if (typeof w.__startBotAvatarStream === 'function') {
+          const list = (w.__poweronVideoSenders = w.__poweronVideoSenders || []);
-            w.__startBotAvatarStream();
+          list.push({ sender, originalTrackId: track.id });
-          }
-          const av: MediaStreamTrack | undefined = w.__botAvatarVideoTrack;
-          if (av && av.readyState === 'live') {
-            try {
-              track.stop();
-            } catch {
-              // ignore
-            }
-            useTrack = av.clone();
-            // eslint-disable-next-line no-console
-            console.log('[AudioPlayback] pc.addTrack swapped video -> avatar id=' + useTrack.id);
-          }
         }
       } catch {
         // ignore
       }
-      return _origAddTrack.call(this, useTrack, ...streams);
+      return sender;
     };
     RTCProto.addTransceiver = function (trackOrKind: any, init?: any) {
       try {
@@ -72,6 +68,86 @@ export const poweronMediaPatchInstall = (opts: MediaGetUserMediaPatchOptions) =>
       }
       return _origAddTransceiver.call(this, trackOrKind, init);
     };
+    if (_origRemoveTrack) {
+      RTCProto.removeTrack = function (sender: any) {
+        try {
+          // eslint-disable-next-line no-console
+          console.log(
+            '[AudioPlayback] pc.removeTrack senderTrackKind='
+            + (sender && sender.track && sender.track.kind)
+            + ' senderTrackId=' + (sender && sender.track && sender.track.id),
+          );
+        } catch {
+          // ignore
+        }
+        return _origRemoveTrack.call(this, sender);
+      };
+    }
+    if (_origReplaceTrackProto) {
+      (window as any).RTCRtpSender.prototype.replaceTrack = function (track: any) {
+        try {
+          // eslint-disable-next-line no-console
+          console.log(
+            '[AudioPlayback] sender.replaceTrack(by=teams?) currentKind='
+            + (this.track && this.track.kind)
+            + ' newKind=' + (track && track.kind)
+            + ' newId=' + (track && track.id),
+          );
+        } catch {
+          // ignore
+        }
+        return _origReplaceTrackProto.call(this, track);
+      };
+    }
+    const _logSdp = (label: string, sdp?: string) => {
+      try {
+        if (!sdp) {
+          // eslint-disable-next-line no-console
+          console.log('[AudioPlayback] ' + label + ' sdp=<none>');
+          return;
+        }
+        const lines = sdp.split(/\r?\n/);
+        const interesting: string[] = [];
+        let curM = '';
+        for (const ln of lines) {
+          if (ln.startsWith('m=')) {
+            curM = ln.slice(2, 7);
+            interesting.push('M:' + ln);
+          } else if (
+            ln.startsWith('a=sendrecv')
+            || ln.startsWith('a=sendonly')
+            || ln.startsWith('a=recvonly')
+            || ln.startsWith('a=inactive')
+          ) {
+            interesting.push(curM + ':' + ln);
+          } else if (ln.startsWith('a=mid:')) {
+            interesting.push(curM + ':' + ln);
+          }
+        }
+        // eslint-disable-next-line no-console
+        console.log('[AudioPlayback] ' + label + ' ' + interesting.join(' | '));
+      } catch {
+        // ignore
+      }
+    };
+    RTCProto.setLocalDescription = function (desc?: any) {
+      try {
+        const t = desc && (desc.type || desc.sdp ? desc.type : 'auto');
+        _logSdp('setLocalDescription type=' + t, desc && desc.sdp);
+      } catch {
+        // ignore
+      }
+      return _origSetLocalDescription.call(this, desc);
+    };
+    RTCProto.setRemoteDescription = function (desc?: any) {
+      try {
+        const t = desc && desc.type;
+        _logSdp('setRemoteDescription type=' + t, desc && desc.sdp);
+      } catch {
+        // ignore
+      }
+      return _origSetRemoteDescription.call(this, desc);
+    };
   }
 
   if (!w.__ttsStreamDest) {
@@ -113,8 +189,10 @@ export const poweronMediaPatchInstall = (opts: MediaGetUserMediaPatchOptions) =>
     canvas.width = 640;
     canvas.height = 360;
     canvas.setAttribute('data-poweron-avatar', '1');
+    // Render at a real size so the compositor produces frames in headless mode.
+    // captureStream() in headless Chromium can stall when the canvas is 0/invisible.
     canvas.style.cssText =
-      'position:fixed;right:0;bottom:0;width:4px;height:4px;z-index:2147483646;opacity:1;pointer-events:none;';
+      'position:fixed;left:0;top:0;width:160px;height:90px;z-index:2147483646;opacity:0.99;pointer-events:none;background:#000;';
     (document.body || document.documentElement).appendChild(canvas);
     w.__botAvatarCanvas = canvas;
     const c2d = canvas.getContext('2d');
@@ -157,9 +235,11 @@ export const poweronMediaPatchInstall = (opts: MediaGetUserMediaPatchOptions) =>
       c2d.fillRect(0, hPx - 6, wPx, 6);
     };
     draw();
-    w.__botAvatarDrawInterval = window.setInterval(draw, 1000 / _fps);
+    // Capture at fps for compositor-driven frames AND also push manual frames
-    const cap = canvas.captureStream(_fps);
+    // via requestFrame() each tick for headless reliability.
+    const cap = (canvas as any).captureStream(_fps) as MediaStream;
     w.__botAvatarVideoTrack = cap.getVideoTracks()[0];
+    w.__botAvatarStreamObj = cap;
     if (w.__botAvatarVideoTrack) {
       w.__botAvatarVideoTrack.enabled = true;
       try {
@@ -168,6 +248,22 @@ export const poweronMediaPatchInstall = (opts: MediaGetUserMediaPatchOptions) =>
         // ignore
       }
     }
+    const _tickAndPush = () => {
+      try {
+        draw();
+      } catch {
+        // ignore
+      }
+      try {
+        const tr: any = w.__botAvatarVideoTrack;
+        if (tr && typeof tr.requestFrame === 'function') {
+          tr.requestFrame();
+        }
+      } catch {
+        // ignore
+      }
+    };
+    w.__botAvatarDrawInterval = window.setInterval(_tickAndPush, 1000 / _fps);
     // eslint-disable-next-line no-console
     console.log(
       '[AudioPlayback] canvas avatar stream (re)built, videoTrack=',
@@ -196,7 +292,17 @@ export const poweronMediaPatchInstall = (opts: MediaGetUserMediaPatchOptions) =>
     for (const pc of pcs) {
       const transceivers = (pc as any).getTransceivers?.() || [];
       totalTransceivers += transceivers.length;
-      let pcHasVideoSender = false;
+      // Snapshot signaling/connection state for diagnostics.
+      try {
+        // eslint-disable-next-line no-console
+        console.log(
+          '[AudioPlayback] pc state sig=' + (pc as any).signalingState
+          + ' conn=' + (pc as any).connectionState
+          + ' ice=' + (pc as any).iceConnectionState,
+        );
+      } catch {
+        // ignore
+      }
       for (const t of transceivers) {
         const sender = t.sender;
         if (!sender) {
@@ -209,13 +315,25 @@ export const poweronMediaPatchInstall = (opts: MediaGetUserMediaPatchOptions) =>
           continue;
         }
         videoTransceivers++;
-        pcHasVideoSender = true;
         directionsBefore.push(t.direction);
         if (sender.track) {
           videoSendersWithTrack++;
         } else {
           videoSendersWithoutTrack++;
         }
+        // Only replace the track if Teams has fully negotiated the video sender.
+        // Touching it before currentDirection is set can abort the in-flight
+        // SDP renegotiation and leave the stream stuck.
+        const cd = (t as any).currentDirection;
+        const alreadyOurs = sender.track && sender.track.id === src.id;
+        if (!cd || cd === 'inactive') {
+          directionsAfter.push('skip(cd=' + (cd || 'null') + ')');
+          continue;
+        }
+        if (alreadyOurs) {
+          directionsAfter.push('keep(' + t.direction + ')');
+          continue;
+        }
         try {
           // eslint-disable-next-line no-await-in-loop
           await sender.replaceTrack(src.clone());
@@ -224,29 +342,50 @@ export const poweronMediaPatchInstall = (opts: MediaGetUserMediaPatchOptions) =>
           if (tr && !tr.enabled) {
             tr.enabled = true;
           }
-          if (t.direction === 'inactive' || t.direction === 'recvonly') {
-            try {
-              t.direction = 'sendrecv';
-            } catch {
-              // ignore
-            }
-          }
           directionsAfter.push(t.direction);
         } catch (err: any) {
           directionsAfter.push('err:' + String(err && err.message ? err.message : err).slice(0, 32));
         }
       }
-      if (!pcHasVideoSender) {
+    }
+    // Read outbound stats unconditionally so we can see what RTP streams exist.
+    const videoStats: any[] = [];
+    const currentDirections: string[] = [];
+    for (const pc of pcs) {
       try {
-          const newSender = (pc as any).addTrack(src.clone(), w.__botAvatarCanvas?.captureStream
+        const transceivers = (pc as any).getTransceivers?.() || [];
-            ? w.__botAvatarCanvas.captureStream(15)
+        for (const t of transceivers) {
-            : new MediaStream([src.clone()]));
+          const sender = t.sender;
-          if (newSender) {
+          const txKind =
-            added++;
+            (t as any).kind
+            || sender?.track?.kind
+            || t.receiver?.track?.kind
+            || null;
+          if (txKind === 'video') {
+            currentDirections.push(`d=${t.direction}/cd=${(t as any).currentDirection || 'n/a'}`);
           }
-        } catch (err) {
+          if (!sender) {
-          directionsAfter.push('addTrack-err:' + String((err as any)?.message || err).slice(0, 32));
+            continue;
           }
+          // eslint-disable-next-line no-await-in-loop
+          const stats = await sender.getStats();
+          stats.forEach((r: any) => {
+            if (r.type === 'outbound-rtp') {
+              videoStats.push({
+                kind: r.kind || r.mediaType || 'unknown',
+                bytes: r.bytesSent || 0,
+                packets: r.packetsSent || 0,
+                framesEncoded: r.framesEncoded || 0,
+                framesSent: r.framesSent || 0,
+                fps: r.framesPerSecond || 0,
+                w: r.frameWidth || 0,
+                h: r.frameHeight || 0,
+              });
+            }
+          });
+        }
+      } catch {
+        // ignore
       }
     }
     return {
@@ -260,6 +399,12 @@ export const poweronMediaPatchInstall = (opts: MediaGetUserMediaPatchOptions) =>
       totalTransceivers,
       directionsBefore,
       directionsAfter,
+      currentDirections,
+      videoStats,
+      trackId: src.id,
+      trackEnabled: src.enabled,
+      trackReady: src.readyState,
+      trackMuted: src.muted,
     };
   };
 

src/config.ts

@@ -16,9 +16,14 @@ export const config = {
   botHeadless: process.env.BOT_HEADLESS !== 'false',
   /**
    * Replace Chromium's fake test-pattern video with a canvas stream (gradient + label).
-   * Unset in production with BOT_USE_CANVAS_VIDEO=false if you need camera off / profile tile only.
+   * Default OFF: in tests with the poweron tenant the Teams SFU rejects all
+   * outbound video m-lines (port=0/inactive) regardless of which track we send,
+   * so enabling video just costs CPU + adds a misleading "camera on" indicator
+   * for other participants without ever transmitting frames. Set
+   * BOT_USE_CANVAS_VIDEO=true if a future tenant policy permits IP video and
+   * you want to push the canvas stream.
    */
-  botUseCanvasVideo: process.env.BOT_USE_CANVAS_VIDEO !== 'false',
+  botUseCanvasVideo: process.env.BOT_USE_CANVAS_VIDEO === 'true',
 
   // Logging
   logLevel: process.env.LOG_LEVEL || 'info',