collectpads: Don't initially send an invalid DTS

Sending a possibly invalid DTS may confuse the muxers, which will
then think the DTS is going backward.

https://bugzilla.gnome.org/show_bug.cgi?id=740575

diff --git a/libs/gst/base/gstcollectpads.c b/libs/gst/base/gstcollectpads.c
index 1973cdb..1ce1591 100644 (file)
--- a/libs/gst/base/gstcollectpads.c
+++ b/libs/gst/base/gstcollectpads.c
@@ -1642,7 +1642,7 @@ gst_collect_pads_clip_time (GstCollectPads * pads, GstCollectData * data,
   if (pads->priv->clip_func) {
     in = gst_buffer_new ();
     GST_BUFFER_PTS (in) = time;
-    GST_BUFFER_DTS (in) = time;
+    GST_BUFFER_DTS (in) = GST_CLOCK_TIME_NONE;
     pads->priv->clip_func (pads, data, in, &out, pads->priv->clip_user_data);
     if (out) {
       otime = GST_BUFFER_PTS (out);