ffmpeg: use one command to stream video/audio

http/route/nanokvm_ui.go

@@ -5,6 +5,7 @@ import (
 	"rkkvm/http/hw/stream"
 	"rkkvm/http/middleware"
 	"rkkvm/http/reqrsp"
+	"time"
 
 	"github.com/gin-gonic/gin"
 	log "github.com/sirupsen/logrus"
@@ -70,7 +71,12 @@ func SetScreen(c *gin.Context) {
 		})
 		return
 	}
+
+	log.Debug("Stopping ffmpeg SetScreen")
 	ffmpeg.Stop()
+	time.Sleep(100 * time.Millisecond)
+	ffmpeg.ApplyOptions()
+	log.Debug("Starting ffmpeg SetScreen")
 	ffmpeg.Start()
 
 	log.Debugf("update screen: %+v", req)