reduce playout latency

scripts/playout-fb.sh

 #!/bin/bash
-#!/bin/sh
 
 port=$1
 
@@ -10,5 +9,11 @@ export SDL_AUDIODRIVER="alsa"
 export AUDIODEV="hdmi:CARD=PCH,DEV=0"
 ffplay \
     -v verbose \
-    -analyzeduration 1000 \
-    -i tcp://localhost:${port}
+    -fflags nobuffer \
+    -flags low_delay \
+    -probesize 32 \
+    -analyzeduration 50 \
+    -framedrop \
+    -f matroska \
+    -i tcp://localhost:${port} \
+    -vf "setpts=0"