updated to ubuntu 26

streaming-agent/gst_agent.py

@@ -4,14 +4,15 @@ GStreamer WebRTC Agent for CSS Streaming
 
 Two tracks published to Cloudflare Calls:
   - Video:      ximagesrc (Xwayland :99) → VP8 → webrtcbin
-  - Game audio: pulsesrc → Opus → webrtcbin
+  - Game audio: pipewiresrc → Opus → webrtcbin
 
 CSS renders via Wine Wayland driver → Weston (Vulkan/DXVK) → Xwayland → X11
 ximagesrc captures from Xwayland X11 display :99
 
 Dependencies:
   apt: python3-gst-1.0 gstreamer1.0-plugins-bad gstreamer1.0-plugins-good
-       gstreamer1.0-plugins-ugly gstreamer1.0-libav xdotool weston xwayland
+       gstreamer1.0-plugins-ugly gstreamer1.0-libav gstreamer1.0-pipewire
+       xdotool weston xwayland wireplumber pipewire pipewire-pulse
   pip: requests websockets
 """
 
@@ -109,19 +110,26 @@ class CSSStreamAgent:
 
     def build_pipeline(self):
         pipeline_str = (
-            # Video: ximagesrc from Xwayland display → VP8
+            # Video: ximagesrc → convert → scale → rate-enforce → VP8
+            # videoconvert must come before caps negotiation;
+            # videoscale enforces width/height; videorate enforces framerate.
             f'ximagesrc display-name={DISPLAY} use-damage=0 ! '
-            f'video/x-raw,framerate={CAP_FPS}/1,width={CAP_W},height={CAP_H} ! '
             f'videoconvert ! '
+            f'videoscale ! '
+            f'videorate ! '
+            f'video/x-raw,framerate={CAP_FPS}/1,width={CAP_W},height={CAP_H} ! '
             f'vp8enc deadline=1 target-bitrate=1500000 keyframe-max-dist=60 '
             f'error-resilient=partitions lag-in-frames=0 ! '
             f'rtpvp8pay pt=96 ! '
             f'application/x-rtp,media=video,encoding-name=VP8,payload=96 ! '
             f'webrtcbin. '
 
-            # Game audio: pulsesrc → Opus
-            f'pulsesrc ! '
-            f'audio/x-raw,rate=48000,channels=2 ! '
+            # Game audio: pipewiresrc → Opus
+            # pipewiresrc is the native PipeWire GStreamer source (Ubuntu 24+/26).
+            # It connects to the default audio output monitor via PipeWire directly,
+            # avoiding the PulseAudio compatibility layer entirely.
+            f'pipewiresrc ! '
+            f'audio/x-raw,format=F32LE,rate=48000,channels=2 ! '
             f'audioconvert ! '
             f'opusenc ! '
             f'rtpopuspay pt=97 ! '