<html> <head> <style> P { margin:0px; padding:0px } body { FONT-SIZE: 10pt; FONT-FAMILY:Tahoma } </style> </head> <body> Ok, I'm terminally frustrated. I have an element that's trying to play nice with decodebin (yes, I posted a similar question before, but I have more details now).  The element is a demuxer.. typefind works, the element loads, I parse the input file and then generate a NEWSEGMENT event to push out.  Immediately on sending the NEWSEGMENT I see: decodebin gstdecodebin.c:664:pad_probe:<d>[00m Pad probe on pad <mydecoder0:src> but pad <mydecoder0:src> still needs data. The command line is: gst-launch filesrc location=/mytestfiles/test001.vid ! decodebin name=d d. ! myoverlaysink The pipeline proceeds to play, I don't see any error messages or warnings anywhere, yet the playback is garbled. Not using decodebin and specifying the pipeline explicitly, thus, works without garbled playback: gst-launch filesrc location=/mytestfiles/test001.vid ! mydemux name=q q. ! queue ! mydecoder ! myoverlaysink q. ! myaudiosink Does this possibly have something to do with the MIME type I'm returning from my demuxers typefind function?  I notice that qtdemux does NOT have a typefind, so past this point it's kind of useless as a template. All assistance appreciated before I tear out what's left of my hair. ..ed.. </body> </html>