more seeking code + expire cookies

1 files changed, 7 insertions, 1 deletions

diff --git a/matroska/src/write.rs b/matroska/src/write.rs
index 2555380..8fc17c3 100644
--- a/matroska/src/write.rs
+++ b/matroska/src/write.rs
@@ -76,7 +76,13 @@ impl<W: Write> EbmlWriter<W> {
 
 impl<W: Seek> Seek for EbmlWriter<W> {
     fn seek(&mut self, pos: std::io::SeekFrom) -> std::io::Result<u64> {
-        self.inner.seek(pos)
+        self.inner.seek(pos)?;
+        match pos {
+            std::io::SeekFrom::Start(s) => self.position = s as usize,
+            std::io::SeekFrom::End(_) => unimplemented!(),
+            std::io::SeekFrom::Current(s) => self.position += s as usize,
+        }
+        Ok(self.position as u64)
     }
 }