diff --git a/src/backend/media/biz-media/src/main/kotlin/com/tencent/bkrepo/media/stream/Mux.kt b/src/backend/media/biz-media/src/main/kotlin/com/tencent/bkrepo/media/stream/Mux.kt
index 126f4c00a3..61393d6fca 100644
--- a/src/backend/media/biz-media/src/main/kotlin/com/tencent/bkrepo/media/stream/Mux.kt
+++ b/src/backend/media/biz-media/src/main/kotlin/com/tencent/bkrepo/media/stream/Mux.kt
@@ -82,17 +82,16 @@ class Mux {
                 )
                 ifmtCtx!!.pb(avio)
             }
-            check(avformat.avformat_open_input(ifmtCtx, fileName, null, null) >= 0) { "open failed" }
-            check(avformat.avformat_find_stream_info(ifmtCtx, null as? PointerPointer<*>) >= 0) {
-                "can't find stream info"
-            }
+            var ret = avformat.avformat_open_input(ifmtCtx, fileName, null, null)
+            check(ret >= 0) { "open failed [$ret]" }
+            ret = avformat.avformat_find_stream_info(ifmtCtx, null as? PointerPointer<*>)
+            check(ret >= 0) { "can't find stream info [$ret]" }
             if (logger.isDebugEnabled) {
                 avformat.av_dump_format(ifmtCtx, 0, fileName, 0)
             }
             val outputFilePath = outputFile!!.absolutePath
-            check(avformat.avformat_alloc_output_context2(ofmtCtx, null, null, outputFilePath) >= 0) {
-                "create output ctx error"
-            }
+            ret = avformat.avformat_alloc_output_context2(ofmtCtx, null, null, outputFilePath)
+            check(ret >= 0) { "create output ctx error [$ret]" }
             val streamMapping = mutableMapOf<Int, Int>()
             var streamIndex = 0
 
@@ -271,6 +270,7 @@ class Mux {
             val b = ByteArray(buf_size)
             val size = inputStream.read(b)
             return if (size < 0) {
+                logger.info("input end")
                 avutil.AVERROR_EOF
             } else {
                 buf.put(b, 0, size)