fix crash by multi-sample descriptions (Close #1)

Fix a NULL pointer access in PrintVideoInfo().
k-takata · Nov 18, 2012 · 177894e · 177894e
1 parent 8df4104
commit 177894e
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/lib/mp4v2/src/mp4info.cpp b/src/lib/mp4v2/src/mp4info.cpp
@@ -315,7 +315,8 @@ static char* PrintVideoInfo(
 
     media_data_name = MP4GetTrackMediaDataName(mp4File, trackId);
     // encv 264b
-    if (strcasecmp(media_data_name, "encv") == 0) {
+    if ((media_data_name != NULL) &&
+        (strcasecmp(media_data_name, "encv") == 0)) {
         if (MP4GetTrackMediaDataOriginalFormat(mp4File,
                                                trackId,
                                                originalFormat,