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-rw-r--r--libavformat/wtvdec.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/libavformat/wtvdec.c b/libavformat/wtvdec.c
index 9157042d08..338eff8bfb 100644
--- a/libavformat/wtvdec.c
+++ b/libavformat/wtvdec.c
@@ -372,7 +372,11 @@ static int read_probe(AVProbeData *p)
static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
{
time_t t = (value / 10000000LL) - 11644473600LL;
- strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
+ struct tm *tm = gmtime(&t);
+ if (tm)
+ strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
+ else
+ buf[0] = '\0';
}
/**
@@ -381,7 +385,11 @@ static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
{
time_t t = (value / 10000000LL) - 719162LL*86400LL;
- strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
+ struct tm *tm = gmtime(&t);
+ if (tm)
+ strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
+ else
+ buf[0] = '\0';
}
/**