diff --git a/config/ini/streaming-audio b/config/ini/streaming-audio
index 65e4152..fff712e 100644
--- a/config/ini/streaming-audio
+++ b/config/ini/streaming-audio
@@ -152,7 +152,7 @@ audio mixer verbose 0
 audio sink verbose 0
 
 audio feed add 1 Audio 1
-audio feed channels 1 1
+audio feed channels 1 2
 audio feed rate 1 44100
 audio feed format 1 16 signed
 audio feed mute off 1
@@ -161,7 +161,7 @@ audio feed mute off 1
 audio feed delay 1 50
 
 audio feed add 2 Audio 2
-audio feed channels 2 1
+audio feed channels 2 2
 audio feed rate 2 44100
 audio feed format 2 16 signed
 audio feed mute off 2
diff --git a/config/ini/videomixer.ini b/config/ini/videomixer.ini
index d75962e..0114932 100644
--- a/config/ini/videomixer.ini
+++ b/config/ini/videomixer.ini
@@ -85,7 +85,7 @@ tcl eval set scene(setactivesilent) 1
 tcl eval SceneSetBackground 0 1
 
 # Scene 1
-tcl eval SceneCreate "Fullscreen" 1
+tcl eval SceneCreate "Fullscreen 1" 1
 #tcl eval SceneAddFrame 1 1 0 0 1280 720
 tcl eval SceneAddFrame 1 2 1410 20 480 270
 tcl eval SceneSetFrameSource 1 1 feed 2 0 1
@@ -93,6 +93,15 @@ tcl eval SceneSetFrameSource 1 1 feed 1 1 1
 tcl eval SceneSetFrameSource 1 2 feed 2 1 1
 tcl eval SceneSetBackground 1 1
 
+# Scene 2
+tcl eval SceneCreate "Fullscreen 2" 2
+tcl eval SceneAddFrame 2 1 0 0 1920 1080
+tcl eval SceneAddFrame 2 2 1410 20 480 270
+tcl eval SceneSetFrameSource 2 1 feed 2 0 1
+tcl eval SceneSetFrameSource 2 1 feed 1 1 1
+tcl eval SceneSetFrameSource 2 2 feed 2 1 1
+tcl eval SceneSetBackground 2 1
+
 tcl eval SceneSetState 0 1
 
 include ini/streaming-audio
diff --git a/docker-compose.yml b/docker-compose.yml
index fcd83df..4637009 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -32,10 +32,11 @@ services:
     volumes:
     - sockets:/run/snowmix
     - ./tools:/tools:ro
+    - /storage:/storage
     environment:
     - SNOWMIX_YOUTUBE_SECRET
     ports:
-    - 20001:20001
+    - 20000-20010:20000-20010
     command: /tools/output2cdn-base
     ipc: host
     # FIXME workaround for janus staying in host network ;_;
@@ -101,17 +102,17 @@ services:
     network_mode: host
     ipc: host
 
-  sound-capture:
-    build: .
-    restart: unless-stopped
-    volumes:
-    - sockets:/run/snowmix
-    - ./tools:/tools
-    command: /tools/pulse2feed 3 'alsa_output.pci-0000_00_0f.0.analog-stereo.monitor'
-    network_mode: host
-    ipc: host
-    environment:
-    - SNOWMIX_IP=10.8.0.95
-    - PULSE_SERVER=sound.waw.hackerspace.pl
+    #  sound-capture:
+    # build: .
+    #restart: unless-stopped
+    #volumes:
+    #- sockets:/run/snowmix
+    #- ./tools:/tools
+    #command: /tools/pulse2feed 3 'alsa_output.pci-0000_00_0f.0.analog-stereo.monitor'
+    #network_mode: host
+    #ipc: host
+    #environment:
+    #- SNOWMIX_IP=10.8.0.95
+    #- PULSE_SERVER=sound.waw.hackerspace.pl
 volumes:
   sockets:
diff --git a/tools/output2cdn-base b/tools/output2cdn-base
index 3aba816..d17dfdd 100755
--- a/tools/output2cdn-base
+++ b/tools/output2cdn-base
@@ -159,13 +159,17 @@ echo SINK: $SINK
             queue                                   !\
             $audioencoder                           !\
             $ENCAUDIOFORMAT                         !\
+	    tee name=encaudio ! \
             queue                                   !\
             flvmux streamable=true name=mux         !\
 			tee name=mirror !\
             queue                                   !\
 	    $SINK \
             encvid. ! queue ! rtph264pay config-interval=1 pt=96 ! udpsink host=janus port=8004 \
-	    mirror. ! queue ! tcpserversink port=20001 host=0.0.0.0
+	    mirror. ! queue ! tcpserversink port=20001 host=0.0.0.0 \
+	    encvid. ! queue ! previewmux. encaudio. ! queue ! previewmux. \
+	    matroskamux name=previewmux streamable=true ! tee name=mkvdump ! queue ! tcpserversink port=20002 host=0.0.0.0 \
+	    mkvdump. ! queue ! filesink location="/storage/streamdump-$(date +%Y%m%d_%H%M%S).mkv"
      exit 1
     )
             #fakesink \
diff --git a/tools/pulse2feed b/tools/pulse2feed
index 205b18d..17b3918 100755
--- a/tools/pulse2feed
+++ b/tools/pulse2feed
@@ -72,7 +72,7 @@ snowmix=snowmix
     if [ X$snowmix != X ] ; then
         (
 	  echo 'audio feed ctr isaudio '$feed_id
-	  $gstlaunch -q $SRC ! queue ! audioconvert ! audioresample ! audiorate ! $AUDIOFORMAT ! fdsink fd=1 sync=true
+	  $gstlaunch -q $SRC ! queue ! audioconvert ! audioresample ! audiorate ! $AUDIOFORMAT ! queue ! fdsink fd=1 sync=false
         ) | nc $SNOWMIX_IP $SNOWMIX_PORT
     else
       echo Snowmix is not running. Quitting $0