placeholder for FLV demuxing

src/demux/flv.rs

@@ -0,0 +1,23 @@
+use std::error::Error;
+use std::io;
+use std::io::Read;
+
+use crate::util;
+use crate::demux::input;
+
+pub struct FLVReader {
+    stdin: io::Stdin
+}
+
+impl input::FileReader for FLVReader {
+    fn init(&mut self) -> Result<util::Metadata, Box<dyn Error>> {
+        todo!();
+    }
+    fn read_nalu(&mut self) -> Result<util::NALUPacket, Box<dyn Error>> {
+        todo!();
+    }
+}
+
+pub fn new_reader(stdin: io::Stdin) -> Result<FLVReader, Box<dyn Error>> {
+    todo!();
+}