feat: Configure video tracks for high bitrate and prefer VP8/H264 codecs.

public/app.js

@@ -25,7 +25,18 @@ socket.on('viewer', id => {
     peerConnections[id] = peerConnection;
 
     activeStream.getTracks().forEach(track => {
-        peerConnection.addTrack(track, activeStream);
+        const sender = peerConnection.addTrack(track, activeStream);
+        
+        // Force high bitrate for best possible 1080p60 quality
+        if (track.kind === 'video') {
+            const params = sender.getParameters();
+            if (!params.encodings) params.encodings = [{}];
+            
+            // Set max bandwidth to 10 Mbps (10,000,000 bps)
+            params.encodings[0].maxBitrate = 10000000; 
+            
+            sender.setParameters(params).catch(e => console.error("Could not set high bitrate:", e));
+        }
     });
 
     peerConnection.onicecandidate = event => {
@@ -36,7 +47,32 @@ socket.on('viewer', id => {
 
     peerConnection
         .createOffer()
-        .then(sdp => peerConnection.setLocalDescription(sdp))
+        .then(sdp => {
+            // Force VP8/H264 on the SDP offer to maximize compatibility with Chromium
+            const RTCRtpSender = RTCRtpSender || window.RTCRtpSender;
+            if (RTCRtpSender && RTCRtpSender.getCapabilities) {
+                const capabilities = RTCRtpSender.getCapabilities('video');
+                if (capabilities && capabilities.codecs) {
+                    const preferredCodecs = capabilities.codecs.filter(c => 
+                        c.mimeType.toLowerCase() === 'video/vp8' || 
+                        c.mimeType.toLowerCase() === 'video/h264'
+                    );
+                    if (preferredCodecs.length > 0) {
+                        const transceivers = peerConnection.getTransceivers();
+                        transceivers.forEach(transceiver => {
+                            if (transceiver.receiver.track.kind === 'video') {
+                                try {
+                                    transceiver.setCodecPreferences(preferredCodecs);
+                                } catch (e) {
+                                    console.warn('Failed to set codec preferences:', e);
+                                }
+                            }
+                        });
+                    }
+                }
+            }
+            return peerConnection.setLocalDescription(sdp);
+        })
         .then(() => {
             socket.emit('offer', id, peerConnection.localDescription);
         });