Gnolin/Python - decoding 2 video streams
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Gnolin/Python - decoding 2 video streams
 
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Hi,
I am now trying to get 2 video streams connected end to end in gnolin and I am still missing a some pieces. I have 2 streams. Each in a "gnlfilesource". Each filesource in "gnlcomposition". I have a callback for "pad-added" to each composition. From what I have found and read. "gnlfilesource" handles its own decodebin. The callback is never called in the case of 2 video streams. I get a decodebin error. Below... 'gstdecodebin2.c(3135): gst_decode_bin_expose (): /GstPipeline:mypipeline/GnlComposition:gnlcomposition1/GnlFileSource:gnlfilesource1/GstURIDecodeBin:internal-uridecodebin/GstDecodeBin2:decodebin20:\nno suitable plugins found' If I do the 2 audio streams this works. And I can connect this to an "input-selector" If I use just gnlfilesource without the compositions I have the same problem as well. It still seems like I am missing something fundamental. Do I need to build my own input's using "gnlsource" and not "gnlfilesource"? Thanks, Matt _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Gnolin/Python - decoding 2 video streams
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An update. If I put both "gnlfilesource" in one "gnlcomposition". I
get further. - The first "pad-added" is called. - Gstreamer handles the first 5 seconds of the first stream. - Finally I get the an error at the end/start of the second streams time. This got me thinking my pipeline is wrong. And I have tried quite a few variations with no success. (queue, multiqueue, input-selector) Here is a sample code (not perfectly complete) Thanks again # create an video input selector self.video_input = gst.element_factory_make('input-selector') self.pipeline.add(self.video_input) # create an video queue self.video_queue = gst.element_factory_make('queue') # self.video_queue = gst.element_factory_make('multiqueue') self.pipeline.add(self.video_queue) # create an videoconverter self.videoconvert = gst.element_factory_make("ffmpegcolorspace") self.pipeline.add(self.videoconvert) self.video_encoder = gst.element_factory_make('theoraenc') self.pipeline.add(self.video_encoder) # create an mux self.mux = gst.element_factory_make('oggmux', 'mv_mux') self.pipeline.add(self.mux) # create an fakesink self.sink = gst.element_factory_make("fakesink", "fakesink") self.sink = gst.element_factory_make('filesink') self.sink.set_property("location", "/transcoder/samples/pygst_out.ogg") self.pipeline.add(self.sink) self.mux.link(self.sink) # link video pipe self.video_input.link(self.video_queue) self.video_queue.link(self.videoconvert) self.videoconvert.link(self.video_encoder) self.video_encoder.link(self.mux) # ----------------------- stream 1 --------------------------- # create a comp for each file self.comp1 = gst.element_factory_make("gnlcomposition") self.pipeline.add(self.comp1) self.comp1.connect("pad-added", self.OnPad) self.stream1 = gst.element_factory_make("gnlfilesource") self.comp1.add(self.stream1) self.stream1.set_property("location", "/transcoder/samples/media/example.ogg") self.stream1.set_property("caps", gst.caps_from_string("video/x-raw-yuv")) self.stream1.set_property("start", 0 * gst.SECOND) self.stream1.set_property("duration", 5 * gst.SECOND) self.stream1.set_property("media-start", 0 * gst.SECOND) self.stream1.set_property("media-duration", 5 * gst.SECOND) # ----------------------- stream 2 --------------------------- # create a gnlfilesource self.stream2 = gst.element_factory_make("gnlfilesource") self.comp1.add(self.stream2) # set the gnlfilesource properties self.stream2.set_property("location", "/transcoder/samples/media/ANML_06_sort.ogg") self.stream2.set_property("caps", gst.caps_from_string("audio/x-raw-yuv")) self.stream2.set_property("start", 5 * gst.SECOND) self.stream2.set_property("duration", 5 * gst.SECOND) self.stream2.set_property("media-start", 0 * gst.SECOND) self.stream2.set_property("media-duration", 5 * gst.SECOND) self.pipeline.set_state(gst.STATE_PLAYING) self.mainloop.run() def OnPadLog(self, element, pad): aCaps = pad.get_caps() aName = aCaps[0].get_name() print "OnPadLog added:", aName if aName == 'video/x-raw-yuv': # aPad = self.video_queue.get_compatible_pad(pad, pad.get_caps()) aPad = self.video_input.get_compatible_pad(pad, pad.get_caps()) if not aPad.is_linked(): # Only link once print "linking video pads" pad.link(aPad) # self.video_queue.link(self.videoconvert) # for multiqueue print "linking video pads done" On Tue, Feb 15, 2011 at 1:07 PM, Matt Veenstra <[hidden email]> wrote: > Hi, > > I am now trying to get 2 video streams connected end to end in gnolin > and I am still missing a some pieces. > > I have 2 streams. Each in a "gnlfilesource". Each filesource in > "gnlcomposition". I have a callback for "pad-added" to each > composition. From what I have found and read. "gnlfilesource" > handles its own decodebin. > > The callback is never called in the case of 2 video streams. I get a > decodebin error. Below... > 'gstdecodebin2.c(3135): gst_decode_bin_expose (): > /GstPipeline:mypipeline/GnlComposition:gnlcomposition1/GnlFileSource:gnlfilesource1/GstURIDecodeBin:internal-uridecodebin/GstDecodeBin2:decodebin20:\nno > suitable plugins found' > > If I do the 2 audio streams this works. And I can connect this to an > "input-selector" > If I use just gnlfilesource without the compositions I have the same > problem as well. > > It still seems like I am missing something fundamental. Do I need to > build my own input's using "gnlsource" and not "gnlfilesource"? > > Thanks, > Matt > gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Gnolin/Python - decoding 2 video streams
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In reply to this post by Matt Veenstra
Solved. My bug. Copy and paste error on the caps.
self.stream1.set_property("caps", gst.caps_from_string("video/x-raw-yuv")) self.stream2.set_property("caps", gst.caps_from_string("audio/x-raw-yuv")) I am sure there will be more questions. On Tue, Feb 15, 2011 at 1:07 PM, Matt Veenstra <[hidden email]> wrote: > Hi, > > I am now trying to get 2 video streams connected end to end in gnolin > and I am still missing a some pieces. > > I have 2 streams. Each in a "gnlfilesource". Each filesource in > "gnlcomposition". I have a callback for "pad-added" to each > composition. From what I have found and read. "gnlfilesource" > handles its own decodebin. > > The callback is never called in the case of 2 video streams. I get a > decodebin error. Below... > 'gstdecodebin2.c(3135): gst_decode_bin_expose (): > /GstPipeline:mypipeline/GnlComposition:gnlcomposition1/GnlFileSource:gnlfilesource1/GstURIDecodeBin:internal-uridecodebin/GstDecodeBin2:decodebin20:\nno > suitable plugins found' > > If I do the 2 audio streams this works. And I can connect this to an > "input-selector" > If I use just gnlfilesource without the compositions I have the same > problem as well. > > It still seems like I am missing something fundamental. Do I need to > build my own input's using "gnlsource" and not "gnlfilesource"? > > Thanks, > Matt > gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Gnolin/Python - decoding 2 video streams
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On Tue, Feb 15, 2011 at 11:25 PM, Matt Veenstra <[hidden email]> wrote:
> Solved. My bug. Copy and paste error on the caps. > > self.stream1.set_property("caps", gst.caps_from_string("video/x-raw-yuv")) > self.stream2.set_property("caps", gst.caps_from_string("audio/x-raw-yuv")) > > I am sure there will be more questions. > > On Tue, Feb 15, 2011 at 1:07 PM, Matt Veenstra <[hidden email]> wrote: >> Hi, >> >> I am now trying to get 2 video streams connected end to end in gnolin >> and I am still missing a some pieces. >> >> I have 2 streams. Each in a "gnlfilesource". Each filesource in >> "gnlcomposition". I have a callback for "pad-added" to each >> composition. From what I have found and read. "gnlfilesource" >> handles its own decodebin. >> >> The callback is never called in the case of 2 video streams. I get a >> decodebin error. Below... >> 'gstdecodebin2.c(3135): gst_decode_bin_expose (): >> /GstPipeline:mypipeline/GnlComposition:gnlcomposition1/GnlFileSource:gnlfilesource1/GstURIDecodeBin:internal-uridecodebin/GstDecodeBin2:decodebin20:\nno >> suitable plugins found' >> >> If I do the 2 audio streams this works. And I can connect this to an >> "input-selector" >> If I use just gnlfilesource without the compositions I have the same >> problem as well. >> >> It still seems like I am missing something fundamental. Do I need to >> build my own input's using "gnlsource" and not "gnlfilesource"? >> >> Thanks, >> Matt Glad we could help ;) just kidding, good that you got it solved. Luis _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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In reply to this post by Matt Veenstra
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Luis de Bethencourt <[hidden email]> wrote: >On Tue, Feb 15, 2011 at 11:25 PM, Matt Veenstra <[hidden email]> wrote: >> Solved. My bug. Copy and paste error on the caps. >> >> self.stream1.set_property("caps", gst.caps_from_string("video/x-raw-yuv")) >> self.stream2.set_property("caps", gst.caps_from_string("audio/x-raw-yuv")) >> >> I am sure there will be more questions. >> >> On Tue, Feb 15, 2011 at 1:07 PM, Matt Veenstra <[hidden email]> wrote: >>> Hi, >>> >>> I am now trying to get 2 video streams connected end to end in gnolin >>> and I am still missing a some pieces. >>> >>> I have 2 streams. Each in a "gnlfilesource". Each filesource in >>> "gnlcomposition". I have a callback for "pad-added" to each >>> composition. From what I have found and read. "gnlfilesource" >>> handles its own decodebin. >>> >>> The callback is never called in the case of 2 video streams. I get a >>> decodebin error. Below... >>> 'gstdecodebin2.c(3135): gst_decode_bin_expose (): >>> /GstPipeline:mypipeline/GnlComposition:gnlcomposition1/GnlFileSource:gnlfilesource1/GstURIDecodeBin:internal-uridecodebin/GstDecodeBin2:decodebin20:\nno >>> suitable plugins found' >>> >>> If I do the 2 audio streams this works. And I can connect this to an >>> "input-selector" >>> If I use just gnlfilesource without the compositions I have the same >>> problem as well. >>> >>> It still seems like I am missing something fundamental. Do I need to >>> build my own input's using "gnlsource" and not "gnlfilesource"? >>> >>> Thanks, >>> Matt > >Glad we could help ;) >just kidding, good that you got it solved. > >Luis >_______________________________________________ >gstreamer-devel mailing list >[hidden email] >http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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Hi,
I am wondering if there is a chance to change the rank of a plugin by some configuration without modifying code and rebuilding. Thanks a lot! Cheers. Long _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: How to change rank of a plugin by configuration(without change code and recompile)
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Here is how it's done in Moovida :
bp_enable_factory (const gchar *name, gboolean enable) { GstRegistry *registry = NULL; GstElementFactory *factory = NULL;
registry = gst_registry_get_default (); if (G_UNLIKELY (!registry)) { bp_debug ("failed retrieving default registry"); goto beach;
} factory = gst_element_factory_find (name); if (G_UNLIKELY (!factory)) { bp_debug ("unable to locate the %s factory", name); goto beach;
} // Raise Rank to Primary + 2 as Fluendo codecs use Primary + 1. if (enable) { gst_plugin_feature_set_rank (GST_PLUGIN_FEATURE (factory), GST_RANK_PRIMARY + 2);
} else { // Or set it back to NONE. gst_plugin_feature_set_rank (GST_PLUGIN_FEATURE (factory), GST_RANK_NONE); } beach: if (factory && registry) {
gst_registry_add_feature (registry, GST_PLUGIN_FEATURE (factory)); } return; }
Julien Moutte www.fluendo.com & www.moovida.com P Please consider the environment before printing this e-mail. On Fri, Feb 25, 2011 at 10:36 AM, Bu, Long <[hidden email]> wrote: Hi, _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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Mmm.., thanks for your sharing. But What I what is something like configuration files that gstreamer can read to set ranks automatically. Cheers. Long From: gstreamer-devel-bounces+long.bu=[hidden email] [mailto:gstreamer-devel-bounces+long.bu=[hidden email]] On Behalf Of Julien Moutte Here is how it's done in Moovida : bp_enable_factory (const gchar *name, gboolean enable) { GstRegistry *registry = NULL; GstElementFactory *factory = NULL; registry = gst_registry_get_default (); if (G_UNLIKELY (!registry)) { bp_debug ("failed retrieving default registry"); goto beach; } factory = gst_element_factory_find (name); if (G_UNLIKELY (!factory)) { bp_debug ("unable to locate the %s factory", name); goto beach; } // Raise Rank to Primary + 2 as Fluendo codecs use Primary + 1. if (enable) { gst_plugin_feature_set_rank (GST_PLUGIN_FEATURE (factory), GST_RANK_PRIMARY + 2); } else { // Or set it back to NONE. gst_plugin_feature_set_rank (GST_PLUGIN_FEATURE (factory), GST_RANK_NONE); } beach: if (factory && registry) { gst_registry_add_feature (registry, GST_PLUGIN_FEATURE (factory)); } return; } Julien Moutte www.fluendo.com & www.moovida.com P Please consider the environment before printing this e-mail. On Fri, Feb 25, 2011 at 10:36 AM, Bu, Long <[hidden email]> wrote: Hi, _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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