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-rw-r--r--libavformat/asf-enc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/asf-enc.c b/libavformat/asf-enc.c
index ef2dd278a9..5121965b25 100644
--- a/libavformat/asf-enc.c
+++ b/libavformat/asf-enc.c
@@ -584,6 +584,8 @@ static void flush_packet(AVFormatContext *s)
ASFContext *asf = s->priv_data;
int packet_hdr_size, packet_filled_size;
+ assert(asf->packet_timestamp_end >= asf->packet_timestamp_start);
+
if (asf->is_streamed) {
put_chunk(s, 0x4424, asf->packet_size, 0);
}