creating bins and ghostpads
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Hi all, I am obviously doing something wrong here, but cannot figure out what. Essentially the pipeline is the same as the receiver but I have broken it into bins. I seem to be having problems with the ghostpad, because I get this error: (stream_receiver.py:1914): GStreamer-WARNING **: Trying to connect elements that don't share a common ancestor: vidsource and vidbin Traceback (most recent call last): File "stream_receiver.py", line 118, in <module> server() File "stream_receiver.py", line 27, in __init__ vidsource.link(vidbin) gst.LinkError: failed to link vidsource with vidbin Here is the code: ---------------------------------------------------------------------- #!/bin/env python # The gst pipeline # pipe="udpsrc port=5000 ! smokedec ! autovideosink" # # audio # pipe="$pipe tcpclientsrc host=127.0.0.1 port=5001 ! " # pipe="$pipe speexdec ! queue ! alsasink sync=false " import sys,os import gobject import pygst pygst.require("0.10") import gst class server (object): def __init__(self): # start with video self.pipe = gst.Pipeline("player") # video source vidsource = gst.element_factory_make("udpsrc", "vidsource") vidsource.set_property("port", 5000) vidbin = self.buildvid() self.pipe.add(vidbin) vidsource.link(vidbin) self.pipe.set_state(gst.STATE_PLAYING) def buildvid(self): bin = gst.Bin("vidbin") queue = gst.element_factory_make("queue") smokedec = gst.element_factory_make("smokedec") vidsink = gst.element_factory_make("autovideosink") bin.add(queue, smokedec, vidsink) gst.element_link_many(queue, smokedec, vidsink) # ghostpad binsink = gst.GhostPad("binsink", queue.get_pad("sink")) bin.add_pad(binsink) return bin if __name__ == "__main__": server() loop = gobject.MainLoop() loop.run() ---------------------------------------------------------------------------- What is driving me slightly nuts is that if I put all the buildvid code into init and have a long series of object instatiations with add to pipeline and link it works, but as soon as I started messing with ghostpads and bin (which makes the code much more manageable when adding functionality for windows and macs) this messed up. Below is more code that works, and I cannot figure out why this and why not that. And the other thing is this does work in a commandline pipeline such as the one sitting at the top of the script in comments. I am using the same system for the sender, but I'll only include the local display. This sends an image happily, using the build_localvid bin, and linking it to the camera. ----------------------------------------------------------------------------- #!/bin/env python import sys, os import gobject import pygst pygst.require("0.10") import gst class client(object): def __init__(self): self.pipe = gst.Pipeline("sender") # Initial video input camera = gst.element_factory_make("v4l2src", "camera") vidtee = gst.element_factory_make("tee", "vidtee") self.pipe.add(camera, vidtee) camera.link(vidtee) # local video localvidbin = self.build_localvid() self.pipe.add(localvidbin) vidtee.link(localvidbin) self.pipe.set_state(gst.STATE_PLAYING) def build_localvid(self): """This bin takes a camera (video) stream and produces a live image locally.""" bin = gst.Bin("localvid") queue = gst.element_factory_make("queue") out = gst.element_factory_make("xvimagesink") bin.add(out, queue) queue.link_pads("src", out, "sink") binsink = gst.GhostPad("binsink", queue.get_pad("sink")) bin.add_pad(binsink) return bin if __name__ == '__main__': client() loop = gobject.MainLoop() loop.run() --------------------------------------------------------------------------- This does the correct thing, and I get a live image from the camera. I am completely stumped on this one, and have resorted to using gst.parse_bin_from_description() with the gst-launch pipeline, but this is far from ideal from a maintenance perspective. :) I am sure I am missing something pretty obvious, but so far flailing around in my ignorance has not let me stumble on a solution. Thanks for any help, Rohan ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: creating bins and ghostpads
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Add vidsource in pipeline ?
Rohan a écrit : > Hi all, > > I am obviously doing something wrong here, but cannot figure out > what. > > Essentially the pipeline is the same as the receiver but I have broken > it into bins. I seem to be having problems with the ghostpad, because > I get this error: > > (stream_receiver.py:1914): GStreamer-WARNING **: Trying to connect elements that > don't share a common ancestor: vidsource and vidbin > > Traceback (most recent call last): > File "stream_receiver.py", line 118, in <module> > server() > File "stream_receiver.py", line 27, in __init__ > vidsource.link(vidbin) > gst.LinkError: failed to link vidsource with vidbin > > Here is the code: > > ---------------------------------------------------------------------- > #!/bin/env python > > # The gst pipeline > # pipe="udpsrc port=5000 ! smokedec ! autovideosink" > # # audio > # pipe="$pipe tcpclientsrc host=127.0.0.1 port=5001 ! " > # pipe="$pipe speexdec ! queue ! alsasink sync=false " > > import sys,os > import gobject > import pygst > pygst.require("0.10") > import gst > > class server (object): > def __init__(self): > # start with video > > self.pipe = gst.Pipeline("player") > > # video source > vidsource = gst.element_factory_make("udpsrc", "vidsource") > vidsource.set_property("port", 5000) > > vidbin = self.buildvid() > self.pipe.add(vidbin) > vidsource.link(vidbin) > > > self.pipe.set_state(gst.STATE_PLAYING) > > def buildvid(self): > bin = gst.Bin("vidbin") > queue = gst.element_factory_make("queue") > smokedec = gst.element_factory_make("smokedec") > vidsink = gst.element_factory_make("autovideosink") > bin.add(queue, smokedec, vidsink) > gst.element_link_many(queue, smokedec, vidsink) > > # ghostpad > binsink = gst.GhostPad("binsink", queue.get_pad("sink")) > bin.add_pad(binsink) > return bin > > if __name__ == "__main__": > server() > loop = gobject.MainLoop() > loop.run() > > ---------------------------------------------------------------------------- > > What is driving me slightly nuts is that if I put all the buildvid code > into init and have a long series of object instatiations with add to > pipeline and link it works, but as soon as I started messing with > ghostpads and bin (which makes the code much more manageable when > adding functionality for windows and macs) this messed up. Below is > more code that works, and I cannot figure out why this and why not > that. > > And the other thing is this does work in a commandline pipeline such > as the one sitting at the top of the script in comments. > > I am using the same system for the sender, but I'll only include the > local display. This sends an image happily, using the build_localvid > bin, and linking it to the camera. > > ----------------------------------------------------------------------------- > #!/bin/env python > > import sys, os > import gobject > import pygst > pygst.require("0.10") > import gst > > class client(object): > > def __init__(self): > self.pipe = gst.Pipeline("sender") > > # Initial video input > camera = gst.element_factory_make("v4l2src", "camera") > vidtee = gst.element_factory_make("tee", "vidtee") > self.pipe.add(camera, vidtee) > camera.link(vidtee) > > # local video > localvidbin = self.build_localvid() > self.pipe.add(localvidbin) > vidtee.link(localvidbin) > > self.pipe.set_state(gst.STATE_PLAYING) > > def build_localvid(self): > """This bin takes a camera (video) stream and produces a live image > locally.""" > bin = gst.Bin("localvid") > queue = gst.element_factory_make("queue") > out = gst.element_factory_make("xvimagesink") > bin.add(out, queue) > queue.link_pads("src", out, "sink") > binsink = gst.GhostPad("binsink", queue.get_pad("sink")) > bin.add_pad(binsink) > return bin > > if __name__ == '__main__': > client() > loop = gobject.MainLoop() > loop.run() > > --------------------------------------------------------------------------- > > This does the correct thing, and I get a live image from the camera. > > I am completely stumped on this one, and have resorted to using > gst.parse_bin_from_description() with the gst-launch pipeline, but > this is far from ideal from a maintenance perspective. :) > > I am sure I am missing something pretty obvious, but so far flailing > around in my ignorance has not let me stumble on a solution. > > Thanks for any help, > > Rohan > > > ------------------------------------------------------------------------------ > Come build with us! The BlackBerry® Developer Conference in SF, CA > is the only developer event you need to attend this year. Jumpstart your > developing skills, take BlackBerry mobile applications to market and stay > ahead of the curve. Join us from November 9-12, 2009. Register now! > http://p.sf.net/sfu/devconf > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > > > ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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Aurelien Grimaud wrote:
> Add vidsource in pipeline ? > Oh lord, how embarrassing. Thanks, that is exactly what the problem was. Thanks again, Rohan > Rohan a écrit : >> Hi all, >> >> I am obviously doing something wrong here, but cannot figure out >> what. >> >> Essentially the pipeline is the same as the receiver but I have broken >> it into bins. I seem to be having problems with the ghostpad, because >> I get this error: >> >> (stream_receiver.py:1914): GStreamer-WARNING **: Trying to connect elements that >> don't share a common ancestor: vidsource and vidbin >> >> Traceback (most recent call last): >> File "stream_receiver.py", line 118, in <module> >> server() >> File "stream_receiver.py", line 27, in __init__ >> vidsource.link(vidbin) >> gst.LinkError: failed to link vidsource with vidbin >> >> Here is the code: >> >> ---------------------------------------------------------------------- >> #!/bin/env python >> >> # The gst pipeline >> # pipe="udpsrc port=5000 ! smokedec ! autovideosink" >> # # audio >> # pipe="$pipe tcpclientsrc host=127.0.0.1 port=5001 ! " >> # pipe="$pipe speexdec ! queue ! alsasink sync=false " >> >> import sys,os >> import gobject >> import pygst >> pygst.require("0.10") >> import gst >> >> class server (object): >> def __init__(self): >> # start with video >> >> self.pipe = gst.Pipeline("player") >> >> # video source >> vidsource = gst.element_factory_make("udpsrc", "vidsource") >> vidsource.set_property("port", 5000) >> >> vidbin = self.buildvid() >> self.pipe.add(vidbin) >> vidsource.link(vidbin) >> >> >> self.pipe.set_state(gst.STATE_PLAYING) >> >> def buildvid(self): >> bin = gst.Bin("vidbin") >> queue = gst.element_factory_make("queue") >> smokedec = gst.element_factory_make("smokedec") >> vidsink = gst.element_factory_make("autovideosink") >> bin.add(queue, smokedec, vidsink) >> gst.element_link_many(queue, smokedec, vidsink) >> >> # ghostpad >> binsink = gst.GhostPad("binsink", queue.get_pad("sink")) >> bin.add_pad(binsink) >> return bin >> >> if __name__ == "__main__": >> server() >> loop = gobject.MainLoop() >> loop.run() >> >> ---------------------------------------------------------------------------- >> >> What is driving me slightly nuts is that if I put all the buildvid code >> into init and have a long series of object instatiations with add to >> pipeline and link it works, but as soon as I started messing with >> ghostpads and bin (which makes the code much more manageable when >> adding functionality for windows and macs) this messed up. Below is >> more code that works, and I cannot figure out why this and why not >> that. >> >> And the other thing is this does work in a commandline pipeline such >> as the one sitting at the top of the script in comments. >> >> I am using the same system for the sender, but I'll only include the >> local display. This sends an image happily, using the build_localvid >> bin, and linking it to the camera. >> >> ----------------------------------------------------------------------------- >> #!/bin/env python >> >> import sys, os >> import gobject >> import pygst >> pygst.require("0.10") >> import gst >> >> class client(object): >> >> def __init__(self): >> self.pipe = gst.Pipeline("sender") >> >> # Initial video input >> camera = gst.element_factory_make("v4l2src", "camera") >> vidtee = gst.element_factory_make("tee", "vidtee") >> self.pipe.add(camera, vidtee) >> camera.link(vidtee) >> >> # local video >> localvidbin = self.build_localvid() >> self.pipe.add(localvidbin) >> vidtee.link(localvidbin) >> >> self.pipe.set_state(gst.STATE_PLAYING) >> >> def build_localvid(self): >> """This bin takes a camera (video) stream and produces a live image >> locally.""" >> bin = gst.Bin("localvid") >> queue = gst.element_factory_make("queue") >> out = gst.element_factory_make("xvimagesink") >> bin.add(out, queue) >> queue.link_pads("src", out, "sink") >> binsink = gst.GhostPad("binsink", queue.get_pad("sink")) >> bin.add_pad(binsink) >> return bin >> >> if __name__ == '__main__': >> client() >> loop = gobject.MainLoop() >> loop.run() >> >> --------------------------------------------------------------------------- >> >> This does the correct thing, and I get a live image from the camera. >> >> I am completely stumped on this one, and have resorted to using >> gst.parse_bin_from_description() with the gst-launch pipeline, but >> this is far from ideal from a maintenance perspective. :) >> >> I am sure I am missing something pretty obvious, but so far flailing >> around in my ignorance has not let me stumble on a solution. >> >> Thanks for any help, >> >> Rohan >> >> >> ------------------------------------------------------------------------------ >> Come build with us! The BlackBerry® Developer Conference in SF, CA >> is the only developer event you need to attend this year. Jumpstart your >> developing skills, take BlackBerry mobile applications to market and stay >> ahead of the curve. Join us from November 9-12, 2009. Register now! >> http://p.sf.net/sfu/devconf >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel >> >> >> > > > ------------------------------------------------------------------------------ > Come build with us! The BlackBerry® Developer Conference in SF, CA > is the only developer event you need to attend this year. Jumpstart your > developing skills, take BlackBerry mobile applications to market and stay > ahead of the curve. Join us from November 9-12, 2009. Register now! > http://p.sf.net/sfu/devconf > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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