cannot link elements in pipeline

[Albert Costa]

Hi,

I have a pipeline like 

gst-launch filesrc location=myvideo ! mpegtsdemux ! ffdec_mpeg2video ! ffmpegcolorspace ! directdrawsink

This works fine in command line.

I wanted to put it in a program where I build elements, add them to a pipeline element, and link them together. Everything works fine until I try to link mpegtsdemux and ffdec_mpeg2video together : the result of gst_element_link_pads(demuxer, NULL, decoder, NULL) is false. What kind of thing am I doing wrong? should I give precise pad template names for these elements? I don't want to use a decodebin element for specific reasons (which I successfully already passed on), I just want to have this pipeline.

Thanks for any advice,

Regards,

Al

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[Albert Costa]

I did find my error, I needed to set a callback for pad added of the demuxer, and link it to the decoder sink inside the function. This works fine, a first frame is displayed but then... nothing happens. It just does halt and no more process is carried on. 

What could be the problem?

Regards,

Al

---

De : Albert Costa <[hidden email]>
À : gstreamer <[hidden email]>
Envoyé le : Jeu 25 mars 2010, 16 h 29 min 52 s
Objet : [gst-devel] cannot link elements in pipeline

Hi,

I have a pipeline like 

gst-launch filesrc location=myvideo ! mpegtsdemux ! ffdec_mpeg2video ! ffmpegcolorspace ! directdrawsink

This works fine in command line.

I wanted to put it in a program where I build elements, add them to a pipeline element, and link them together. Everything works fine until I try to link mpegtsdemux and ffdec_mpeg2video together : the result of gst_element_link_pads(demuxer, NULL, decoder, NULL) is false. What kind of thing am I doing wrong? should I give precise pad template names for these elements? I don't want to use a decodebin element for specific reasons (which I successfully already passed on), I just want to have this pipeline.

Thanks for any advice,

Regards,

Al

------------------------------------------------------------------------------
Download Intel&#174; 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
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