dvdemux: First query the peer duration in the requested format before converting...

Fixes usage of dvdemux after another demuxer, e.g. mxfdemux.
Fixes bug #650503.

diff --git a/ext/dv/gstdvdemux.c b/ext/dv/gstdvdemux.c
index 90a26511bc36cd78fc08fd084ab0c6608bc15c42..1eef31e3bb83cf35e0929bce9a3a0c1aecb00b73 100644 (file)
--- a/ext/dv/gstdvdemux.c
+++ b/ext/dv/gstdvdemux.c
@@ -574,26 +574,23 @@ gst_dvdemux_src_query (GstPad * pad, GstQuery * query)
       GstFormat format;
       GstFormat format2;
       gint64 end;
-      GstPad *peer;
 
-      /* get target format */
-      gst_query_parse_duration (query, &format, NULL);
+      /* First ask the peer in the original format */
+      if (!gst_pad_peer_query (dvdemux->sinkpad, query)) {
+        /* get target format */
+        gst_query_parse_duration (query, &format, NULL);
 
-      /* change query to bytes to perform on peer */
-      gst_query_set_duration (query, GST_FORMAT_BYTES, -1);
+        /* change query to bytes to perform on peer */
+        gst_query_set_duration (query, GST_FORMAT_BYTES, -1);
 
-      if ((peer = gst_pad_get_peer (dvdemux->sinkpad))) {
-        /* ask peer for total length */
-        if (!(res = gst_pad_query (peer, query))) {
-          gst_object_unref (peer);
+        /* Now ask the peer in BYTES format and try to convert */
+        if (!gst_pad_peer_query (dvdemux->sinkpad, query)) {
           goto error;
         }
 
         /* get peer total length */
         gst_query_parse_duration (query, NULL, &end);
 
-        gst_object_unref (peer);
-
         /* convert end to requested format */
         if (end != -1) {
           format2 = format;
@@ -601,11 +598,9 @@ gst_dvdemux_src_query (GstPad * pad, GstQuery * query)
                       GST_FORMAT_BYTES, end, &format2, &end))) {
             goto error;
           }
+          gst_query_set_duration (query, format, end);
         }
-      } else {
-        end = -1;
       }
-      gst_query_set_duration (query, format, end);
       break;
     }
     case GST_QUERY_CONVERT: