What happens to a bus, when a bin is inserted into another bin?
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I am working on playing an audio stream from a separate file.
My approach is to construct an instance of the playbin2, listen to the messages on its bus, analyze them and their sources, and decide if both audio and video streams are present. Then, if the audio stream is in the separate file, construct missing parts of the playbin2 - one more uridecodebin, playsink and connecting elements (audiotee, inputselector, etc) - and add them to the playbin2 instance. So, the question is. The uridecodebin and the playsink are bins, therefore, they have their own buses. What should I do with these buses? Next stage will be clock, I'll deal with it later. |
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Can anyone comment on this? Nobody? Ok... For the meantime I just call gst_element_set_bus(uridecodebin,m_bus). |
Re: What happens to a bus, when a bin is inserted into another bin?
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In reply to this post by wl2776
wl2776 wrote:
> I am working on playing an audio stream from a separate file. > > My approach is to construct an instance of the playbin2, listen to the > messages on its bus, analyze them and their sources, and decide if both > audio and video streams are present. > > Then, if the audio stream is in the separate file, construct missing parts > of the playbin2 - one more uridecodebin, playsink and connecting elements > (audiotee, inputselector, etc) - and add them to the playbin2 instance. > > So, the question is. > The uridecodebin and the playsink are bins, therefore, they have their own > buses. > What should I do with these buses? > > Next stage will be clock, I'll deal with it later. > pipleine. gstreamer handles the aggregation and forwarding internaly. Thats why you don't specify a concrete bus when doing gst_element_post_message(). Stefan ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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Thank you for the answer, I'll keep it in mind. However, it appeared to be much simpler. A uridecodebin instance, created with gst_element_factory_make(), simply didn't have any buses, its bus field was NULL. |
Re: Stopping a live capture
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In reply to this post by Stefan Sauer
On Thu, Apr 8, 2010 at 10:44 AM, Wesley J. Miller <[hidden email]> wrote:
gst-launch stops whenever it gets EOS, an error or the user presses ctrl-c AFAIK.
When capturing live, it is useful to use -e option to force the pipeline to push an EOS through the pipeline to make elements finalize their work properly when ctrl-c is pressed.
-- Thiago Sousa Santos ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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For test use, you can
specific ‘-num-buffers=n’ for camera src. For real case, you’d
better send EOS to camera src to quit the pipeline. From my experience, ‘ctrl+c’
made my mp4 file corrupted, though it works for ogg file. Not sure v4l2src support
EOS or not, I added it in my camera src to make sure the hw stop in order. From:
[hidden email] [mailto:[hidden email]] On Thu, Apr 8, 2010 at 10:44 AM, Wesley J. Miller <[hidden email]> wrote:
gst-launch stops whenever it gets EOS, an error or the
user presses ctrl-c AFAIK. When capturing live, it is useful to use -e option to
force the pipeline to push an EOS through the pipeline to make elements
finalize their work properly when ctrl-c is pressed.
------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Stopping a live capture
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2010/4/11 Zhao, Halley <[hidden email]>
Corrupted how? Unfinished? Have you used -e option?
-- Thiago Sousa Santos ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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