diff --git a/src/main.rs b/src/main.rs
index 1efb7c8..6369296 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -199,9 +199,9 @@ struct Controller
 	gui_rgba_gen: Instant,
     gui_needs_frame: bool,
     
-    capture: task::Task <(), ()>,
+    capture_is_running: bool,
     
-    jpeg_decoder: task::Task <(), Instant>,
+    jpeg_decoder_is_running: bool,
     jpeg_needs_frame: bool,
     
     rgba_frame: (Vec <u8>, Instant),
@@ -217,9 +217,8 @@ impl Controller
             gui_needs_frame: false,
             gui_rgba_gen: now,
             
-            capture: ().into (),
-            
-            jpeg_decoder: ().into (),
+            capture_is_running: false,
+            jpeg_decoder_is_running: false,
             jpeg_needs_frame: false,
             
             rgba_frame: (Default::default (), now),
@@ -233,13 +232,13 @@ impl Controller
     
 	fn handle_rgba_frame (&mut self, data: Vec <u8>, gen: Instant)
 	{
-        self.jpeg_decoder.stop (()).unwrap ();
+        self.jpeg_decoder_is_running = false;
 		self.rgba_frame = (data, gen);
 	}
 	
 	fn handle_capture (&mut self, jpeg: JpegFrame)
 	{
-        self.capture.stop (()).unwrap ();
+        self.capture_is_running = false;
 		self.jpeg_frame = jpeg;
 	}
 	
@@ -257,15 +256,15 @@ impl Controller
             
 			Some (MsgFromController::RepaintGui (self.rgba_frame.clone ()))
 		}
-		else if self.gui_needs_frame && ! self.jpeg_decoder.is_running () && self.jpeg_frame.time > self.rgba_frame.1
+		else if self.gui_needs_frame && ! self.jpeg_decoder_is_running  && self.jpeg_frame.time > self.rgba_frame.1
 		{
-			self.jpeg_decoder.start (self.jpeg_frame.time).unwrap ();
+			self.jpeg_decoder_is_running = true;
 			self.jpeg_needs_frame = false;
 			Some (MsgFromController::StartJpegDecoder (self.jpeg_frame.clone ()))
 		}
-		else if self.jpeg_needs_frame && ! self.capture.is_running ()
+		else if self.jpeg_needs_frame && ! self.capture_is_running
 		{
-            self.capture.start (()).unwrap ();
+            self.capture_is_running = true;
 			Some (MsgFromController::StartCapture)
 		}
 		else if self.gui_needs_frame && self.jpeg_frame.time == self.rgba_frame.1