1 files changed, 3 insertions, 1 deletions
diff --git a/libavformat/file.c b/libavformat/file.c
index ee1f72a00c..b1d61caf89 100644
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -37,7 +37,9 @@ static int file_open(URLContext *h, const char *filename, int flags)
 
     strstart(filename, "file:", &filename);
 
-    if (flags & URL_WRONLY) {
+    if (flags & URL_RDWR) {
+        access = O_CREAT | O_TRUNC | O_RDWR;
+    } else if (flags & URL_WRONLY) {
         access = O_CREAT | O_TRUNC | O_WRONLY;
     } else {
         access = O_RDONLY;