diff --git a/.changeset/slow-walls-reply.md b/.changeset/slow-walls-reply.md
new file mode 100644
index 00000000..c2b4b600
--- /dev/null
+++ b/.changeset/slow-walls-reply.md
@@ -0,0 +1,5 @@
+---
+'@webav/av-cliper': patch
+---
+
+fix: decoder queue size maybe too large
diff --git a/packages/av-cliper/src/clips/mp4-clip.ts b/packages/av-cliper/src/clips/mp4-clip.ts
index a8ccd09a..8f34e075 100644
--- a/packages/av-cliper/src/clips/mp4-clip.ts
+++ b/packages/av-cliper/src/clips/mp4-clip.ts
@@ -685,11 +685,13 @@ class VideoFrameFinder {
 
   #decoding = false;
   #startDecode = async (dec: VideoDecoder) => {
-    if (this.#decoding) return;
-    this.#decoding = true;
+    if (this.#decoding || dec.decodeQueueSize > 600) return;
 
     // 启动解码任务，然后重试
     let endIdx = this.#videoDecCusorIdx + 1;
+    if (endIdx > this.samples.length) return;
+
+    this.#decoding = true;
     // 该 GoP 时间区间有时间匹配，且未被删除的帧
     let hasValidFrame = false;
     for (; endIdx < this.samples.length; endIdx++) {