1 files changed, 27 insertions, 0 deletions
diff --git a/src/boxes/mvex.rs b/src/boxes/mvex.rs
new file mode 100644
index 0000000..ede5da1
--- /dev/null
+++ b/src/boxes/mvex.rs
@@ -0,0 +1,27 @@
+use four_cc::FourCC;
+
+use bytes::BytesMut;
+
+use crate::{Mp4Box, Mp4BoxError};
+
+use super::{MovieExtendsHeaderBox, TrackExtendsBox};
+
+pub struct MovieExtendsBox {
+    pub mehd: MovieExtendsHeaderBox,
+    pub trex: TrackExtendsBox,
+}
+
+impl Mp4Box for MovieExtendsBox {
+    const NAME: FourCC = FourCC(*b"mvex");
+
+    fn content_size(&self) -> u64 {
+        self.mehd.size() + self.trex.size()
+    }
+
+    fn write_box_contents(&self, writer: &mut BytesMut) -> Result<(), Mp4BoxError> {
+        self.mehd.write(writer)?;
+        self.trex.write(writer)?;
+
+        Ok(())
+    }
+}