Using a Bin
Locked
 
|
Hello!
I'm trying to build a pipeline using an element and a Bin. I can connect both (videotestsrc to a bin with decodebi2 and autovideosink inside). I add both (decodebin2 and autovideosink) to the bin, and then, added videotestsrc and the bin to a pipeline. At the end, I link the videotestsrc to the bin, and it doesn't work. If I create the bin usign the "normal" way (declare the bin, the elements, add it to the bin...) it simply can't link the videotestsrc to the bin. If I create the bin using parse_bin_from_description, all goes fine, but the image of the videotestsrc "freeze". I suppose that I'm missing some step... Can you help me? Best regards and thanks in advance! ------------------------------------------------------------------------------ Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! http://p.sf.net/sfu/adobe-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
|
|
On Fri, 2010-10-15 at 18:25 +0200, José Luis Segura Lucas wrote:
> If I create the bin usign the "normal" way (declare the bin, the > elements, add it to the bin...) it simply can't link the videotestsrc > to the bin. When creating your bin you need to create a ghost pad targeting the decodebin2 sink pad, so you can link the videotestsrc to the bin. Other than that, you also need to connect to "new-decoded-pad" signal from decodebin2 and link the pad to autovideosink in you callback. > If I create the bin using parse_bin_from_description, all goes fine, > but the image of the videotestsrc "freeze". I suppose that I'm missing > some step... Can you help me? I don't know what may be causing that. Check if that happens when you do it the "normal" way too. But it's a little odd to use decodebin2 in that pipeline. Why are you doing that? Regards, Luciana Fujii ------------------------------------------------------------------------------ Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! http://p.sf.net/sfu/adobe-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
|
|
El Fri, 15 Oct 2010 14:23:07 -0300
Luciana Fujii Pontello <[hidden email]> escribió: > On Fri, 2010-10-15 at 18:25 +0200, José Luis Segura Lucas wrote: > > > If I create the bin usign the "normal" way (declare the bin, the > > elements, add it to the bin...) it simply can't link the > > videotestsrc to the bin. > > When creating your bin you need to create a ghost pad targeting the > decodebin2 sink pad, so you can link the videotestsrc to the bin. > Other than that, you also need to connect to "new-decoded-pad" signal > from decodebin2 and link the pad to autovideosink in you callback. > > > If I create the bin using parse_bin_from_description, all goes fine, > > but the image of the videotestsrc "freeze". I suppose that I'm > > missing some step... Can you help me? > > I don't know what may be causing that. Check if that happens when you > do it the "normal" way too. Doing it the normal way (videotestsrc -> decodebin2 -> autovideosink) works perfect (without using Bin) > But it's a little odd to use decodebin2 > in that pipeline. Why are you doing that? Well, I know. It is only an example. I use the decodebin2 because I need two elements inside the bin and one outside. My problem is in another program, but this is the smallest snippet I can imagine to show the problem to you :-) > > Regards, Thanks for your time! ------------------------------------------------------------------------------ Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! http://p.sf.net/sfu/adobe-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
|
|
I just try to use gst.Bin directly and it works (using ghost pads and
so...). The only way I can't get it working is creating the Bin using the function parse_bin_from_description. :-( El Sat, 16 Oct 2010 00:13:48 +0200 José Luis Segura Lucas <[hidden email]> escribió: > El Fri, 15 Oct 2010 14:23:07 -0300 > Luciana Fujii Pontello <[hidden email]> escribió: > > On Fri, 2010-10-15 at 18:25 +0200, José Luis Segura Lucas wrote: > > > > > If I create the bin usign the "normal" way (declare the bin, the > > > elements, add it to the bin...) it simply can't link the > > > videotestsrc to the bin. > > > > When creating your bin you need to create a ghost pad targeting the > > decodebin2 sink pad, so you can link the videotestsrc to the bin. > > Other than that, you also need to connect to "new-decoded-pad" > > signal from decodebin2 and link the pad to autovideosink in you > > callback. > > > > > If I create the bin using parse_bin_from_description, all goes > > > fine, but the image of the videotestsrc "freeze". I suppose that > > > I'm missing some step... Can you help me? > > > > I don't know what may be causing that. Check if that happens when > > you do it the "normal" way too. > > Doing it the normal way (videotestsrc -> decodebin2 -> autovideosink) > works perfect (without using Bin) > > > > But it's a little odd to use decodebin2 > > in that pipeline. Why are you doing that? > > Well, I know. It is only an example. I use the decodebin2 because I > need two elements inside the bin and one outside. My problem is in > another program, but this is the smallest snippet I can imagine to > show the problem to you :-) > > > > > Regards, > > Thanks for your time! > ------------------------------------------------------------------------------ Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! http://p.sf.net/sfu/adobe-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
|
|
El día 16 de octubre de 2010 00:28, José Luis Segura Lucas
<[hidden email]> escribió: > I just try to use gst.Bin directly and it works (using ghost pads and > so...). > > The only way I can't get it working is creating the Bin using the > function parse_bin_from_description. :-( You need to set the second argument to True, this will automatically create a ghost pad for unliked pad in the bin. Andoni > > El Sat, 16 Oct 2010 00:13:48 +0200 > José Luis Segura Lucas <[hidden email]> escribió: >> El Fri, 15 Oct 2010 14:23:07 -0300 >> Luciana Fujii Pontello <[hidden email]> escribió: >> > On Fri, 2010-10-15 at 18:25 +0200, José Luis Segura Lucas wrote: >> > >> > > If I create the bin usign the "normal" way (declare the bin, the >> > > elements, add it to the bin...) it simply can't link the >> > > videotestsrc to the bin. >> > >> > When creating your bin you need to create a ghost pad targeting the >> > decodebin2 sink pad, so you can link the videotestsrc to the bin. >> > Other than that, you also need to connect to "new-decoded-pad" >> > signal from decodebin2 and link the pad to autovideosink in you >> > callback. >> > >> > > If I create the bin using parse_bin_from_description, all goes >> > > fine, but the image of the videotestsrc "freeze". I suppose that >> > > I'm missing some step... Can you help me? >> > >> > I don't know what may be causing that. Check if that happens when >> > you do it the "normal" way too. >> >> Doing it the normal way (videotestsrc -> decodebin2 -> autovideosink) >> works perfect (without using Bin) >> >> >> > But it's a little odd to use decodebin2 >> > in that pipeline. Why are you doing that? >> >> Well, I know. It is only an example. I use the decodebin2 because I >> need two elements inside the bin and one outside. My problem is in >> another program, but this is the smallest snippet I can imagine to >> show the problem to you :-) >> >> > >> > Regards, >> >> Thanks for your time! >> > > > ------------------------------------------------------------------------------ > Download new Adobe(R) Flash(R) Builder(TM) 4 > The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly > Flex(R) Builder(TM)) enable the development of rich applications that run > across multiple browsers and platforms. Download your free trials today! > http://p.sf.net/sfu/adobe-dev2dev > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > -- Andoni Morales Alastruey LongoMatch:The Digital Coach http://www.longomatch.ylatuya.es ------------------------------------------------------------------------------ Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! http://p.sf.net/sfu/adobe-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
|
|
El Sat, 16 Oct 2010 01:30:17 +0200
Andoni Morales <[hidden email]> escribió: > > The only way I can't get it working is creating the Bin using the > > function parse_bin_from_description. :-( > You need to set the second argument to True, this will automatically > create a ghost pad for unliked pad in the bin. I tried, and it make no difference (only that I need to create the ghost pad by hand if the second argument is false). When I create the bin with that function, the bin is freeze and only show one frame, not a video. ------------------------------------------------------------------------------ Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! http://p.sf.net/sfu/adobe-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
|
|
In reply to this post by José Luis Segura Lucas
On 16/10/2010, at 2:25 AM, José Luis Segura Lucas wrote:
> Hello! > > I'm trying to build a pipeline using an element and a Bin. > > I can connect both (videotestsrc to a bin with decodebi2 and > autovideosink inside). > > I add both (decodebin2 and autovideosink) to the bin, and then, added > videotestsrc and the bin to a pipeline. > > At the end, I link the videotestsrc to the bin, and it doesn't work. The pipeline you describe doesn't actually work (connecting a videotestsrc to decodebin2), i.e.: Daves-MacBook-Pro:bin dave$ gst-launch videotestsrc ! bin. \( decodebin2 ! autovideosink \) Setting pipeline to PAUSED ... Pipeline is PREROLLING ... ERROR: from element /GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0: Internal data flow error. Additional debug info: gstbasesrc.c(2543): gst_base_src_loop (): /GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0: streaming task paused, reason not-linked (-1) ERROR: pipeline doesn't want to preroll. Setting pipeline to NULL ... Freeing pipeline ... Daves-MacBook-Pro:bin dave$ However, if you provide an encoded media file then it works fine: Daves-MacBook-Pro:videos dave$ gst-launch filesrc location=Jumper.mov ! bin. \( decodebin2 name=a a. ! audioconvert ! audioresample ! autoaudiosink a. ! ffmpegcolorspace ! autovideosink \) Setting pipeline to PAUSED ... Pipeline is PREROLLING ... Pipeline is PREROLLED ... Setting pipeline to PLAYING ... New clock: GstAudioSinkClock [snip] Cheers, - Dave L ------------------------------------------------------------------------------ Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! http://p.sf.net/sfu/adobe-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
|
|
I just test it on my Debian unstable and it works perfectly (your
command, copy and pasted). I don't understand what is the difference between create the bin by hand or using the function parse_bin_from_description. A little example in Python: import gobject import gst def connection(element, pad, next_element): print pad.get_name() if pad.get_name() == 'src0': element.link(next_element) pipe = gst.Pipeline() src = gst.element_factory_make('videotestsrc', 'src_element') dec = gst.element_factory_make('decodebin2', 'dec_element') sink = gst.element_factory_make('xvimagesink', 'sink_element') bin = gst.Bin('my_bin') bin.add(dec, sink) bin.add_pad(gst.GhostPad('bin_sink', dec.get_static_pad('sink'))) dec.connect('pad-added', connection, sink) pipe.add(src, bin) src.link(bin) pipe.set_state(gst.STATE_PLAYING) gobject.MainLoop().run() This example works fine, but if I change: dec = gst.element_factory_make('decodebin2', 'dec_element') sink = gst.element_factory_make('xvimagesink', 'sink_element') bin = gst.Bin('my_bin') bin.add(dec, sink) bin.add_pad(gst.GhostPad('bin_sink', dec.get_static_pad('sink'))) dec.connect('pad-added', connection, sink) to: bin = gst.parse_bin_from_description('decodebin2 ! xvimagesink', True) It only freeze when it starts playing. I tried using a filesrc instead the videotestsrc, and the result is the same: the first example works, the second, doesn't play nothing El Sat, 16 Oct 2010 20:44:04 +1000 David Liu <[hidden email]> escribió: > The pipeline you describe doesn't actually work (connecting a > videotestsrc to decodebin2), i.e.: > > Daves-MacBook-Pro:bin dave$ gst-launch videotestsrc ! bin. > \( decodebin2 ! autovideosink \) Setting pipeline to PAUSED ... > Pipeline is PREROLLING ... > ERROR: from > element /GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0: > Internal data flow error. Additional debug info: gstbasesrc.c(2543): > gst_base_src_loop > (): /GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0: streaming > task paused, reason not-linked (-1) ERROR: pipeline doesn't want to > preroll. Setting pipeline to NULL ... Freeing pipeline ... > Daves-MacBook-Pro:bin dave$ > > However, if you provide an encoded media file then it works fine: > > Daves-MacBook-Pro:videos dave$ gst-launch filesrc > location=Jumper.mov ! bin. \( decodebin2 name=a a. ! audioconvert ! > audioresample ! autoaudiosink a. ! ffmpegcolorspace ! autovideosink > \) Setting pipeline to PAUSED ... Pipeline is PREROLLING ... Pipeline > is PREROLLED ... Setting pipeline to PLAYING ... > New clock: GstAudioSinkClock > [snip] > > > Cheers, > > - Dave L ------------------------------------------------------------------------------ Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! http://p.sf.net/sfu/adobe-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
«
Return to GStreamer-devel
|
1 view|%1 views
| Free forum by Nabble | Edit this page |