Replying to myself because I have just realized that the issue is with my own code. I had code in the function starting (i.e. resuming after a pause) the pipeline, which tested whether the pipeline was already running. So the error message came from my own logic and makes perfect sense now. Sorry for spamming. Andreas <div class="gmail_quote">On Wed, Apr 30, 2008 at 12:04 PM, Andreas Schuler <<a href="mailto:andreas@neokast.com" target="_blank">andreas@neokast.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi all, I have been struggling with this issue for some time now. My setup looks as follows: <ul><li>2 fakesrc components, which are injecting encoded audio and video data</li><li>Sources are connected to a multiqueue</li> <li>Queue is connected to two decoding bins</li><li>Standard audio and video rendering tails (i.e. convert filters, rendering sinks etc.) are connected to decoding bin source pads </li></ul> I am starting the pipeline using the following command (m_bin is of type GstPipeline): gst_element_set_state (m_bin, GST_STATE_PLAYING); This works fine and my content is getting played back. Then I am attempting to pause the pipeline using this code: gst_element_set_state (m_bin, GST_STATE_PAUSED); I have a bus listener and can confirm that I get the state change on the pipeline itself. About 3 seconds after getting that message, I get another one on the bus of type GST_MESSAGE_ERROR. The message reads (there are no debug details provided): "Pipeline is still running, stop first or wait for pending stop." I have been grepping the GStreamer code for some time now but could not find that (or parts of) string. After this error it seems impossible to restart the pipeline. I was wondering whether anyone could tell me what I am missing. Thanks, Andreas </blockquote></div>