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-rw-r--r--libavformat/alp.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/alp.c b/libavformat/alp.c
index 8c6066a59c..cc72279d78 100644
--- a/libavformat/alp.c
+++ b/libavformat/alp.c
@@ -134,6 +134,8 @@ static int alp_read_header(AVFormatContext *s)
par->bits_per_coded_sample;
avpriv_set_pts_info(st, 64, 1, par->sample_rate);
+ st->ts_flags = AVFORMAT_TS_FLAG_DURATION;
+
return 0;
}