<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> <title></title> </head> <body bgcolor="#ffffff" text="#000000"> A little more information: src2 likes to have a higher priority that src1. If I remove the gnloperation completely and run only with gnlfilesources for src1 and src2, if src2 has a higher priority than src1, the pipeline hangs when src2 turns on. So if I then add the gnloperation with priority 0 and set src2 priority=1 and src1 priority=2, the pipeline hangs when the gnloperation turns on. I verify this by having src1 turn at time 0 second. Then src2 turns on at time 2 second, and it takes over as seen previously. Then I have gnloperation turn on at 3 seconds, and that is when the pipeline hangs. See the answers to questions below: On 01/04/2011 11:08 AM, Timothy Braun wrote: <blockquote cite="mid:AANLkTin4ZnYDbEW8ZFW9tWu5Q=Qp+h40avR+DXzGL+vg@mail.gmail.com" type="cite">What do you get when you set GST_DEBUG=2?  The pipeline is most likely freezing because of a caps filter or a pad issue.  </blockquote> Here is the output I get when I run wiht GST_DEBUG=2. This is the same output I get if I remove the gnloperation all together, so I am not sure it is related to the issue I am having. <tt>0:00:00.038328446  1353      0x1ed8af0 WARN               gnlsource gnlsource.c:545:gnl_source_change_state:<gnlfilesource0> Couldn't find a valid source pad 0:00:00.054148884  1353      0x22ccd20 WARN                 qtdemux qtdemux_types.c:170:qtdemux_type_get: unknown QuickTime node type avc1 0:00:00.054183522  1353      0x22ccd20 WARN                 qtdemux qtdemux_types.c:170:qtdemux_type_get: unknown QuickTime node type avcC 0:00:01.354701757  1353      0x1ed8af0 WARN               gnlsource gnlsource.c:545:gnl_source_change_state:<gnlfilesource1> Couldn't find a valid source pad 0:00:01.369736423  1353      0x20aad30 WARN                 qtdemux qtdemux_types.c:170:qtdemux_type_get: unknown QuickTime node type avc1 0:00:01.369785865  1353      0x20aad30 WARN                 qtdemux qtdemux_types.c:170:qtdemux_type_get: unknown QuickTime node type avcC</tt> <blockquote cite="mid:AANLkTin4ZnYDbEW8ZFW9tWu5Q=Qp+h40avR+DXzGL+vg@mail.gmail.com" type="cite">What is the pipeline connected to for output? </blockquote> The output is connected to a "queue" and an "autovideosink". The pipeline runs fine when no gnloperation is in place, and the second video takes priority. When I add the gnloperation but do not set any priorities, the pipeline runs as if the gnloperation is not there. When I set the priority on src2 to anything other than 1, then the pipeline hangs. By changing around the "start" time property on the gnloperation, the hanging seems to correspond to whenever the gnloperation starts up. Lane <blockquote cite="mid:AANLkTin4ZnYDbEW8ZFW9tWu5Q=Qp+h40avR+DXzGL+vg@mail.gmail.com" type="cite"> <div class="gmail_quote">On Tue, Jan 4, 2011 at 12:56 PM, Lane Brooks <<a moz-do-not-send="true" href="mailto:lane@brooks.nu">lane@brooks.nu</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <div class="im">On 01/04/2011 10:33 AM, Timothy Braun wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Make sure the gnl input sources have different priorities and set the gnloperations priority to 0. </blockquote> </div> Thanks for the idea. I tried setting the priority of the op to 0, src1 to 1, and src2 to 2. Now when I run it the stream hangs after 2 seconds, which is when the gnloperation and src2 are starting up. I did some testing and the hanging only occurs if I set the priority on src2 to anything other than 0. I can set the priorities on the op and src1 without hanging (it still doesn't work, however). Here is my code again with the updates: <div class="im">        comp = gst.element_factory_make("gnlcomposition")        src1 = gst.element_factory_make("gnlfilesource")        src2 = gst.element_factory_make("gnlfilesource")        comp.add(src1)        src1.set_property("location", "/test1.mp4")        src1.set_property("start",          0 * gst.SECOND)        src1.set_property("duration",       5 * gst.SECOND)        src1.set_property("media-start",    0 * gst.SECOND)        src1.set_property("media-duration", 5 * gst.SECOND) </div>        src1.set_property("priority",       1) <div class="im">        comp.add(src2)        src2.set_property("location", "/test2.mp4")        src2.set_property("start",          2 * gst.SECOND)        src2.set_property("duration",       5 * gst.SECOND)        src2.set_property("media-start",    0 * gst.SECOND)        src2.set_property("media-duration", 5 * gst.SECOND) </div>        src2.set_property("priority",       2) <div class="im">        op = gst.element_factory_make("gnloperation")        tran = gst.element_factory_make("smpte")        tran.set_property("type", 234)        tran.set_property("duration", 3 * gst.SECOND)        op.add(tran) </div> <div class="im">        op.set_property("start",          2 * gst.SECOND)        op.set_property("duration",       3 * gst.SECOND)        op.set_property("media-start",    0 * gst.SECOND)        op.set_property("media-duration", 3 * gst.SECOND) </div>        op.set_property("priority",       0)        comp.add(op) I can get the smpte transition to work correctly on these two streams when not using the gnonlin elements, but that is not very interesting as I have to run the two streams in parallel. Any other ideas? Lane <div> <div class="h5"> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> On Jan 4, 2011, at 12:01 PM, Lane Brooks<<a moz-do-not-send="true" href="mailto:lane@brooks.nu" target="_blank">lane@brooks.nu</a>>  wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> On 01/04/2011 05:39 AM, Edward Hervey wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> On Mon, 2011-01-03 at 23:23 -0700, Lane Brooks wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> I have a gnlcomposition containing two video sources. I would like to apply a smpte transition from one source to the next. I have tried overlapping the two gnlsources by 3 seconds. I then put a 'smpte' element in a 'gnloperation' and add the 'gnloperation' to the 'gnlcompostion'. The addition of the gnloperation doesn't seem to do anything. The resulting video is the same regardless of whether I add the gnloperation or not. The result is always that the second video takes over during the period of overlap. Here is code I have (in python):          comp = gst.element_factory_make("gnlcomposition")          src1 = gst.element_factory_make("gnlfilesource")          src2 = gst.element_factory_make("gnlfilesource")          comp.add(src1)          src1.set_property("location", "/test1.mp4")          src1.set_property("start",          0 * gst.SECOND)          src1.set_property("duration",       5 * gst.SECOND)          src1.set_property("media-start",    0 * gst.SECOND)          src1.set_property("media-duration", 5 * gst.SECOND)          comp.add(src2)          src2.set_property("location", "/test2.mp4")          src2.set_property("start",          2 * gst.SECOND)          src2.set_property("duration",       5 * gst.SECOND)          src2.set_property("media-start",    0 * gst.SECOND)          src2.set_property("media-duration", 5 * gst.SECOND)          op = gst.element_factory_make("gnloperation")          tran = gst.element_factory_make("smpte")          tran.set_property("type", 234)          tran.set_property("duration", 3 * gst.SECOND)          op.add(tran) </blockquote>   Set the [media-]{start|duration} propertie son op also </blockquote> I had already tried this as well.         op.set_property("start",          2 * gst.SECOND)         op.set_property("duration",       3 * gst.SECOND)         op.set_property("media-start",    0 * gst.SECOND)         op.set_property("media-duration", 3 * gst.SECOND) I am not sure what I should put the media-start at, but I have tried both 0 and 2 and neither works. Any other ideas? <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">          comp.add(op) Anyone know if using an smpte transition is possible, and if so, what I am doing wrong? Thanks, Lane </blockquote> </blockquote> </blockquote> </blockquote> </div> </div> </blockquote> </div> </blockquote> </body> </html>