From 165ffc1925eb2cf888d8f2a1b37ba986cb8864d0 Mon Sep 17 00:00:00 2001
From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Tue, 19 May 2026 06:28:09 +0200
Subject: [PATCH] avimuxer: pad odd-sized chunks

---
 nihav-commonfmt/src/muxers/avi.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/nihav-commonfmt/src/muxers/avi.rs b/nihav-commonfmt/src/muxers/avi.rs
index c91f2b5..aec5baf 100644
--- a/nihav-commonfmt/src/muxers/avi.rs
+++ b/nihav-commonfmt/src/muxers/avi.rs
@@ -135,7 +135,10 @@ impl<'a> AVIMuxer<'a> {
 
 fn patch_size(bw: &mut dyn ByteIO, pos: u64) -> MuxerResult<()> {
     let size = bw.tell() - pos;
-    bw.seek(SeekFrom::Current(-((size + 4) as i64)))?;
+    if (bw.tell() & 1) != 0 {
+        bw.write_byte(0)?;
+    }
+    bw.seek(SeekFrom::Current(-((((size + 1) & !1) + 4) as i64)))?;
     bw.write_u32le(size as u32)?;
     bw.seek(SeekFrom::End(0))?;
     Ok(())
-- 
2.39.5