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-rw-r--r--tools/ismindex.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/ismindex.c b/tools/ismindex.c
index 46333680fa..67a1927379 100644
--- a/tools/ismindex.c
+++ b/tools/ismindex.c
@@ -132,7 +132,8 @@ static int write_fragments(struct Tracks *tracks, int start_index,
struct Track *track = tracks->tracks[i];
const char *type = track->is_video ? "video" : "audio";
snprintf(dirname, sizeof(dirname), "QualityLevels(%d)", track->bitrate);
- mkdir(dirname, 0777);
+ if (mkdir(dirname, 0777) == -1)
+ return AVERROR(errno);
for (j = 0; j < track->chunks; j++) {
snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
dirname, type, track->offsets[j].time);