Hi,

in file ext/smoothstreaming/gstmssdemux.c func:gst_mss_demux_stream_select_bitrate() line 571 and 583

Unref a GstCaps missed when an error case.

Please check and share feedback

code:
caps = gst_mss_stream_get_caps (mssstream->manifest_stream);

    GST_DEBUG_OBJECT (stream->pad,
        "Starting streams reconfiguration due to bitrate changes");

    if (protected) {
      const gchar *sys_ids[2] = { protection_system_id, NULL };
      const gchar *selected_system = gst_protection_select_system (sys_ids);

      if (!selected_system) {
        GST_ERROR_OBJECT (mssdemux, "stream is protected, but no "
            "suitable decryptor element has been found");
        return FALSE;
      }

      gst_mss_demux_apply_protection_system (caps, selected_system);
    }

sol:
gst_caps_unref (caps);

Thanks