From cfe31c7f487b595fdf94e9bff16d6ef5fb7a5d7a Mon Sep 17 00:00:00 2001 From: Andreas Rheinhardt Date: Fri, 30 Aug 2019 15:18:29 +0200 Subject: [PATCH] avformat/matroskadec: Use right number of tracks When demuxing a Matroska/WebM file, streams are added for tracks and for attachments, so that the array containing the former can be NULL even when the corresponding AVFormatContext has streams. So check for there to be tracks in the MatroskaDemuxContext instead of just streams in the AVFormatContext before dereferencing the pointer to the tracks. Signed-off-by: Andreas Rheinhardt (cherry picked from commit 1ef30571a0a7150cb20c580bfc52af2a7101c20d) Signed-off-by: Andreas Rheinhardt --- libavformat/matroskadec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c index f47ac31459..4427d3936c 100644 --- a/libavformat/matroskadec.c +++ b/libavformat/matroskadec.c @@ -3785,9 +3785,9 @@ static int webm_dash_manifest_read_header(AVFormatContext *s) av_log(s, AV_LOG_ERROR, "Failed to read file headers\n"); return -1; } - if (!s->nb_streams) { + if (!matroska->tracks.nb_elem || !s->nb_streams) { matroska_read_close(s); - av_log(s, AV_LOG_ERROR, "No streams found\n"); + av_log(s, AV_LOG_ERROR, "No track found\n"); return AVERROR_INVALIDDATA; }