decodebin2: Don't reduce max-size-time of exposed groups. Fixes #579912

The 2s limit is way too small for a lot of files (which have an interleave
in time of between 3 and 5s). Instead, leave it to the initial 5s value
and reduce the other limits (allowing us to stay memory-efficient).

gst/playback/gstdecodebin2.c

@@ -2127,8 +2127,7 @@ gst_decode_group_expose (GstDecodeGroup * group)
     /* update runtime limits. At runtime, we try to keep the amount of buffers
      * in the queues as low as possible (but at least 5 buffers). */
     g_object_set (G_OBJECT (group->multiqueue),
-        "max-size-bytes", 2 * 1024 * 1024,
-        "max-size-time", 2 * GST_SECOND, "max-size-buffers", 5, NULL);
+        "max-size-bytes", 2 * 1024 * 1024, "max-size-buffers", 5, NULL);
     /* we can now disconnect any overrun signal, which is used to expose the
      * group. */
     if (group->overrunsig) {