It seems solved just adding the property of async = true on all appsink elements of dsmcc part.. <div class="gmail_quote">El 1 / setembre / 2009 12:55, Miquel Àngel Farré <<a href="mailto:miquel.farre@gmail.com">miquel.farre@gmail.com</a>> ha escrit: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi, I am working on an application that starts with this pipeline: filesrc location = filename ! mpegtsparse ! mpegtsdemux when mpegtsdemux have a new pad, it calls the function on_new_pad: in case of video it completes the pipeline with: queue ! mpeg2dec ! videoscale ! capsfilter ! glupload ! fakesink (with sync=true) in case of dsmcc content: queue ! appsink The problem is that the video part plays faster than the usual, nevertheless if I comment all the dsmcc part on "on_pad_added" function, video part plays correctly. I can't found where is the problem, but I think it is related with the dsmcc part pipeline, here you can found the link to "on_pad_added" function: <a href="http://www.pastebin.ca/1550152" target="_blank">http://pastebin.ca/1550152</a> Thanks, Miquel </blockquote></div>