Signed-off-by: Paul B Mahol <one...@gmail.com>
---
libavformat/tty.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/libavformat/tty.c b/libavformat/tty.c
index 60f7e9f87e..61e9f3e95c 100644
--- a/libavformat/tty.c
+++ b/libavformat/tty.c
@@ -53,7 +53,13 @@ static int read_probe(const AVProbeData *p)
{
int cnt = 0;
- for (int i = 0; i < p->buf_size; i++)
+ for (int i = 0; i < 8 && i < p->buf_size; i++)
+ cnt += !!isansicode(p->buf[i]);
+
+ if (cnt != 8)
+ return 0;
+
+ for (int i = 8; i < p->buf_size; i++)
cnt += !!isansicode(p->buf[i]);
return (cnt * 100LL / p->buf_size) * (cnt > 400) *
--
2.17.1
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