diff --git a/src/decode/codecs/audio.rs b/src/decode/codecs/audio.rs
index 877cf23..efab7a6 100644
--- a/src/decode/codecs/audio.rs
+++ b/src/decode/codecs/audio.rs
@@ -1,36 +1,34 @@
 use std::error::Error;
-use std::process::{ChildStdin, ChildStdout, Command, Stdio};
-use std::sync::Arc;
+use std::process::{Child, Command, Stdio};
+use std::sync::{Arc, Mutex};
 use std::io::{Read, Write};
+use std::fs::File;
 
 use crate::decode::codecs::Decoder;
 use crate::util;
 
 pub struct AACDecoder {
-    stdin: ChildStdin,
-    stdout: ChildStdout,
+    cmd: Child,
     metadata: Arc<util::Metadata>,
 }
 
-impl Decoder for AACDecoder {
-    fn write_nalu(&mut self, nalu: util::NALUPacket) -> Result<(), Box<dyn Error + Send + Sync>> {
-        self.stdin.write_all(nalu.packet_data.as_slice())?;
+impl Decoder for Arc<Mutex<AACDecoder>> {
+    fn write_nalu(&self, nalu: util::NALUPacket) -> Result<(), Box<dyn Error + Send + Sync>> {
+        let mut self_ptr = self.lock().unwrap();
+        let mut pipe = match &self_ptr.cmd.stdin {
+            Some(x) => x,
+            None => {return Err(Box::new(util::DecoderError::BrokenInPipe))}
+        };
+        pipe.write_all(nalu.packet_data.as_slice())?;
         Ok(())
     }
-    fn read_raw(&mut self) -> Result<util::RawMedia, Box<dyn Error + Send + Sync>> {
+    fn read_raw(&self) -> Result<util::RawMedia, Box<dyn Error + Send + Sync>> {
         todo!();
     }
 }
 
 pub fn new_aac(metadata: Arc<util::Metadata>) -> Result<AACDecoder, Box<dyn Error>> {
-    let cmd = Command::new("tee").stdin(Stdio::piped()).stdout(Stdio::piped()).spawn()?;
-    let stdin = match cmd.stdin {
-        Some(x) => x,
-        None => {return Err(Box::new(util::DecoderError::InvalidPipeInit))}
-    };
-    let stdout = match cmd.stdout {
-        Some(x) => x,
-        None => {return Err(Box::new(util::DecoderError::InvalidPipeInit))}
-    };
-    return Ok(AACDecoder {stdin: stdin, stdout: stdout, metadata: metadata})
+    let f = File::create("raw.aac")?;
+    let cmd = Command::new("tee").stdin(Stdio::piped()).stdout(f).spawn()?;
+    return Ok(AACDecoder {cmd: cmd, metadata: metadata})
 }
diff --git a/src/decode/codecs/video.rs b/src/decode/codecs/video.rs
index b26c929..7673deb 100644
--- a/src/decode/codecs/video.rs
+++ b/src/decode/codecs/video.rs
@@ -1,36 +1,34 @@
 use std::error::Error;
-use std::process::{ChildStdin, ChildStdout, Stdio, Command};
-use std::sync::Arc;
+use std::process::{Child, Stdio, Command};
+use std::sync::{Arc, Mutex};
 use std::io::{Read, Write};
+use std::fs::File;
 
 use crate::decode::codecs::Decoder;
 use crate::util;
 
 pub struct H264Decoder {
-    stdin: ChildStdin,
-    stdout: ChildStdout,
+    cmd: Child,
     metadata: Arc<util::Metadata>,
 }
 
-impl Decoder for H264Decoder {
-    fn write_nalu(&mut self, nalu: util::NALUPacket) -> Result<(), Box<dyn Error + Send + Sync>> {
-        self.stdin.write_all(nalu.packet_data.as_slice())?;
+impl Decoder for Arc<Mutex<H264Decoder>> {
+    fn write_nalu(&self, nalu: util::NALUPacket) -> Result<(), Box<dyn Error + Send + Sync>> {
+        let mut self_ptr = self.lock().unwrap();
+        let mut pipe = match &self_ptr.cmd.stdin {
+            Some(x) => x,
+            None => {return Err(Box::new(util::DecoderError::BrokenInPipe))}
+        };
+        pipe.write_all(nalu.packet_data.as_slice())?;
         Ok(())
     }
-    fn read_raw(&mut self) -> Result<util::RawMedia, Box<dyn Error + Send + Sync>> {
+    fn read_raw(&self) -> Result<util::RawMedia, Box<dyn Error + Send + Sync>> {
         todo!();
     }
 }
 
 pub fn new_h264(metadata: Arc<util::Metadata>) -> Result<H264Decoder, Box<dyn Error>> {
-    let cmd = Command::new("tee").stdin(Stdio::piped()).stdout(Stdio::piped()).spawn()?;
-    let stdin = match cmd.stdin {
-        Some(x) => x,
-        None => {return Err(Box::new(util::DecoderError::InvalidPipeInit))}
-    };
-    let stdout = match cmd.stdout {
-        Some(x) => x,
-        None => {return Err(Box::new(util::DecoderError::InvalidPipeInit))}
-    };
-    return Ok(H264Decoder {stdin: stdin, stdout: stdout, metadata: metadata});
+    let f = File::create("raw.h264")?;
+    let cmd = Command::new("tee").stdin(Stdio::piped()).stdout(f).spawn()?;
+    return Ok(H264Decoder {cmd: cmd, metadata: metadata});
 }