From ec59dc73f0cc8930bf5dae389cd76d049d537ca7 Mon Sep 17 00:00:00 2001 From: Andreas Rheinhardt Date: Thu, 9 Jul 2020 12:07:28 +0200 Subject: [PATCH] avformat/mm: Check for existence of audio stream No audio stream is created unconditionally and if none has been created, no packet with stream_index 1 may be returned. This fixes an assert in ff_read_packet() in libavformat/utils reported in ticket #8782. Reviewed-by: Michael Niedermayer Signed-off-by: Andreas Rheinhardt --- libavformat/mm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavformat/mm.c b/libavformat/mm.c index d40fd12acc..02ffbcd824 100644 --- a/libavformat/mm.c +++ b/libavformat/mm.c @@ -175,6 +175,8 @@ static int read_packet(AVFormatContext *s, return 0; case MM_TYPE_AUDIO : + if (s->nb_streams < 2) + return AVERROR_INVALIDDATA; if ((ret = av_get_packet(s->pb, pkt, length)) < 0) return ret; pkt->stream_index = 1;