---
 libavformat/dashdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
index 693fc7372b..dc56e89f11 100644
--- a/libavformat/dashdec.c
+++ b/libavformat/dashdec.c
@@ -161,7 +161,7 @@ typedef struct DASHContext {
 static int ishttp(char *url)
 {
     const char *proto_name = avio_find_protocol_name(url);
-    return av_strstart(proto_name, "http", NULL);
+    return proto_name && av_strstart(proto_name, "http", NULL);
 }
  static int aligned(int val)
--
2.30.0

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