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-rw-r--r--libavformat/iss.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/libavformat/iss.c b/libavformat/iss.c
index c722f62d2b..0d24c96ce3 100644
--- a/libavformat/iss.c
+++ b/libavformat/iss.c
@@ -112,8 +112,8 @@ static int iss_read_packet(AVFormatContext *s, AVPacket *pkt)
IssDemuxContext *iss = s->priv_data;
int ret = av_get_packet(s->pb, pkt, iss->packet_size);
- if(ret < 0)
- return ret;
+ if(ret != iss->packet_size)
+ return AVERROR(EIO);
pkt->stream_index = 0;
pkt->pts = url_ftell(s->pb) - iss->sample_start_pos;