From 106536426132e29e5352b572a0f173d925ca342c Mon Sep 17 00:00:00 2001
From: dailz <dailz@example.com>
Date: Wed, 15 Apr 2026 14:41:58 +0800
Subject: [PATCH] fix(avhw): add missing mut on video_filter for buffersink
 access

---
 src/avhw.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/avhw.rs b/src/avhw.rs
index a6e48b8..a048575 100644
--- a/src/avhw.rs
+++ b/src/avhw.rs
@@ -165,7 +165,7 @@ impl EncState {
 
         // 3. Filter graph — must be built BEFORE encoder config so we can derive
         //    hw_frames_ctx from the buffersink output (correct surface pool dimensions).
-        let video_filter = build_filter_graph(
+        let mut video_filter = build_filter_graph(
             &hw_device_ctx,
             &frames_rgb,
             width,