celtenc: do not use invalid buffer timestamps

https://bugzilla.gnome.org/show_bug.cgi?id=659087

diff --git a/ext/celt/gstceltenc.c b/ext/celt/gstceltenc.c
index 5579bef..e602e09 100644 (file)
--- a/ext/celt/gstceltenc.c
+++ b/ext/celt/gstceltenc.c
@@ -970,6 +970,7 @@ gst_celt_enc_chain (GstPad * pad, GstBuffer * buf)
   /* Check if we have a continous stream, if not drop some samples or the buffer or
    * insert some silence samples */
   if (enc->next_ts != GST_CLOCK_TIME_NONE &&
+      GST_BUFFER_TIMESTAMP_IS_VALID (buf) &&
       GST_BUFFER_TIMESTAMP (buf) < enc->next_ts) {
     guint64 diff = enc->next_ts - GST_BUFFER_TIMESTAMP (buf);
     guint64 diff_bytes;