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-rw-r--r--demux/demux_lavf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/demux/demux_lavf.c b/demux/demux_lavf.c
index cea05634e9..374714b769 100644
--- a/demux/demux_lavf.c
+++ b/demux/demux_lavf.c
@@ -365,7 +365,7 @@ static void convert_charset(struct demuxer *demuxer)
{
lavf_priv_t *priv = demuxer->priv;
char *cp = priv->opts->sub_cp;
- if (!cp || mp_charset_is_utf8(cp))
+ if (!cp || !cp[0] || mp_charset_is_utf8(cp))
return;
bstr data = stream_read_complete(priv->stream, NULL, 128 * 1024 * 1024);
if (!data.start) {