diff --git a/src/decode/mod.rs b/src/decode/mod.rs
index 72d9556..2117121 100644
--- a/src/decode/mod.rs
+++ b/src/decode/mod.rs
@@ -14,5 +14,8 @@ pub fn spawn(
         ),
         Box<dyn Error>
     > {
-    todo!();
+    let (_raw_v_in, raw_v_out) = mpsc::channel();
+    let (_raw_a_in, raw_a_out) = mpsc::channel();
+    let (_err_in, err_out) = mpsc::channel();
+    return Ok((raw_v_out, raw_a_out, err_out));
 }
diff --git a/src/encode/mod.rs b/src/encode/mod.rs
index 07fa3d6..6e3f157 100644
--- a/src/encode/mod.rs
+++ b/src/encode/mod.rs
@@ -15,5 +15,8 @@ pub fn spawn(
         ),
         Box<dyn Error>
     > {
-    todo!();
+    let (v_in, v_out) = mpsc::channel();
+    let (a_in, a_out) = mpsc::channel();
+    let (err_in, err_out) = mpsc::channel();
+    return Ok((v_out, a_out, err_out));
 }
diff --git a/src/main.rs b/src/main.rs
index 59f5411..9f4336c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -6,6 +6,8 @@ mod muxer;
 
 use std::process::exit;
 use std::sync::mpsc;
+use std::thread;
+use std::time::Duration;
 
 fn init() -> Result<[mpsc::Receiver<Box<dyn std::error::Error + Send + Sync>>; 4], Box<dyn std::error::Error>>{
     let (v_out, a_out, metadata, demux_err_recv) = demux::spawn()?;
@@ -16,7 +18,16 @@ fn init() -> Result<[mpsc::Receiver<Box<dyn std::error::Error + Send + Sync>>; 4
 }
 
 fn process(error_handles: [mpsc::Receiver<Box<dyn std::error::Error + Send + Sync>>; 4]) -> Result<(), Box<dyn std::error::Error>> {
-    todo!();
+    loop {
+        for i in 0..4 {
+            match error_handles[i].try_recv() {
+                Ok(err) => return Err(err),
+                Err(mpsc::TryRecvError::Empty) => (),
+                Err(err) => return Err(Box::new(util::ThreadError(i))),
+            }
+        }
+        thread::sleep(Duration::from_millis(100));
+    }
 }
 
 fn main() {
diff --git a/src/muxer/mod.rs b/src/muxer/mod.rs
index 6a9e922..110e4b9 100644
--- a/src/muxer/mod.rs
+++ b/src/muxer/mod.rs
@@ -11,5 +11,6 @@ pub fn spawn(
         mpsc::Receiver<Box<dyn Error + Send + Sync>>,
         Box<dyn Error>
     > {
-    todo!();
+    let (err_in, err_out) = mpsc::channel();
+    return Ok(err_out);
 }
diff --git a/src/util/mod.rs b/src/util/mod.rs
index 262af45..78550b1 100644
--- a/src/util/mod.rs
+++ b/src/util/mod.rs
@@ -49,11 +49,6 @@ impl Metadata {
     }
 }
 
-pub enum FileType {
-    FLV,
-    MPEGTS,
-}
-
 pub enum NALUPacketType {
     Audio,
     Video,
@@ -76,6 +71,23 @@ pub struct RawMedia {
 
 // Errors
 
+pub struct ThreadError(pub usize);
+
+impl Error for ThreadError {}
+
+impl fmt::Debug for ThreadError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "Disconnect Error in thread index {}, data pipe broken", self.0)
+    }
+}
+
+impl fmt::Display for ThreadError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Debug::fmt(self, f)
+    }
+}
+
+
 pub enum DemuxerError {
     UnknownSyncByte,
     FLVUnknownTagType,