Hi all, I was wondering whether the following can work: - use a fakesrc connected to a capsfilter - Set the GstCaps on the caps filter to something like this: video/x-xvid, width=(int)256, height=(int)144, framerate=(fraction)23/1, format=(fourcc)XVID - Set the maxsize property to something large enough and use the handoff signal to fill in the buffer. Also set the following props:         "signal-handoffs", TRUE,         "is-live", TRUE,         "filltype", 1 /* don't fill */,         "sizemax", size,         "sizetype", 2 /* Makes all samples the same size */, The encoded raw data is provided by the app, which supports a pull model. I have tried out this combination by connecting the capsfilter to a decodebin. The first problem I ran into was the GstFindType element within the decode bin, which seemed to query the duration of the stream, which returned 0. This caused an error. I then connected a query function (using gst_pad_set_query_function) to the source pad on the caps filter (I also provided a gst_pad_set_query_type_function) to return a fake value for duration (I am getting my app data from a live source). I no longer got the previous error but the pipeline still wouldn't run, my handoff callback function never gets called. The question is: Does anyone else know what other properties or caps I would have to set to make this work? I saw some other post asking about the GstAppSrc element. Is this element already part of the latest release and how would I use it? Any help greatly appreciated, Andreas