Dynamic pipelines

[Jorge Fernandez Monteagudo]

Hi all!

I have implemented this pipeline by code:

gst-launch-0.10 filesrc location=test.mp4 ! qtdemux name=demux \
   demux.video_00 ! queue max-size-buffers=2 max-size-time=0 max-size-bytes=0 ! ffdec_h264 ! xvimagesink \
   demux.audio_00 ! queue max-size-buffers=8000 max-size-time=0 max-size-bytes=0 ! faad ! alsasink

When I try to play a 'test.mp4' without audio channel the pipeline is frozen. I use the qtdemux callback
"pad-added" to link the demux with the queues. When no audio channel is present no link is made from
demux and audio queue. The problem is that the elements has been added initially to the pipeline but
they never has data, then they can change to ready or playing state

  // Compose the pipeline.
  gst_bin_add_many( GST_BIN( pipeline ), filesrc, demux,
                    video_queue, video_decode, video_sink,
                    audio_queue, audio_decode, audio_sink, NULL );

  // Link all elements that can be automatically linked because they have "Always" pads.
  if( gst_element_link_many( filesrc, demux, NULL ) != TRUE ||
      gst_element_link_many( video_queue, video_decode, NULL ) != TRUE ||
      gst_element_link_many( video_decode, video_sink, NULL ) != TRUE ||
      gst_element_link_many( audio_queue, audio_decode, NULL ) != TRUE ||
      gst_element_link_many( audio_decode, audio_sink, NULL ) != TRUE ) {
    TRACEMSG( "%s - One element could not be linked.\n", __FUNCTION__ );
    gst_object_unref( pipeline );
    return NULL;
  }

I think its a begginer question but how can I solve this? Ideally I would like to know if it's
possible to generate the correct pipeline at runtime? What's the correct way to implement this?

Thanks!!
Jorge

Este mensaje se dirige exclusivamente a su destinatario y puede contener información privilegiada o CONFIDENCIAL. Si no es vd. el destinatario indicado, queda notificado de que la utilización, divulgación y/o copia sin autorización está prohibida en virtud de la legislación vigente. Si ha recibido este mensaje por error, le rogamos que nos lo comunique inmediatamente por esta misma vía y proceda a su destrucción.

This message is intended exclusively for its addressee and may contain information that is CONFIDENTIAL and protected by professional privilege.
If you are not the intended recipient you are hereby notified that any dissemination, copy or disclosure of this communication is strictly prohibited by law. If this message has been received in error, please immediately notify us via e-mail and delete it.