mp4 mvhd syntax

src/muxer/hls/mp4/atoms.rs

@@ -0,0 +1,34 @@
+struct WindowMatrix {
+    A: u32,
+    B: u32,
+    U: u32,
+    C: u32,
+    D: u32,
+    V: u32,
+    X: u32,
+    Y: u32,
+    W: u32,
+}
+
+struct MOOV {
+    mvhd: MVHD,
+    traks: [TRAK; 2],
+    mvex: MVEX,
+}
+
+struct MVHD {
+    version: u8,
+    flags: u32,
+    create_time: u64,
+    modify_time: u64,
+    time_scale: u32,
+    duration: u64,
+    playrate: u32,
+    volume: u16,
+    matrix: WindowMatrix,
+    next_track_id: u32,
+}
+
+struct TRAK;
+
+struct MVEX;

src/muxer/hls/mp4/mod.rs

@@ -1,4 +1,5 @@
 mod mp4muxer;
+mod atoms;
 
 use std::sync::{mpsc, Arc};
 use std::error::Error;