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-rw-r--r--libavformat/movenc.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 0327bdf797..1d3eb3fe5a 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -91,6 +91,7 @@ static int mov_write_stsz_tag(AVIOContext *pb, MOVTrack *track)
}
if (equalChunks) {
int sSize = track->cluster[0].size/track->cluster[0].entries;
+ sSize = FFMAX(1, sSize); // adpcm mono case could make sSize == 0
avio_wb32(pb, sSize); // sample size
avio_wb32(pb, entries); // sample count
}