[gst-devel] Issue with decodebin ?

[Darren Staples]

Hi again :)

Is there an issue with using the decodebin element programmatically ?

This command line works fine:
gst-launch filesrc location=file.flv ! decodebin ! ffmpegcolorspace !
ximagesink

But when I try to code it up as follows: (some code left out for clarity)

  // Create gstreamer elements
  pipeline    = gst_pipeline_new( "video" );
  source      = gst_element_factory_make( "filesrc"          , "src" );
  decoder     = gst_element_factory_make( "decodebin"        , "decoder" );
  colorspace1 = gst_element_factory_make( "ffmpegcolorspace" , "colorspace1"
);
  sink        = gst_element_factory_make( "ximagesink"       , "sink" );

  if ( !pipeline || !source || !decoder || !colorspace1 || !sink )
  {
    g_printerr( "One element could not be created. Exiting.\n" );
    return -1;
  }

  // Set the input filename to the source element
  g_object_set( G_OBJECT( source ) , "location" , "file.flv" , NULL );

  // Add all elements into the pipeline
  gst_bin_add_many( GST_BIN( pipeline ) , source , decoder , colorspace1 ,
sink , NULL );

  // Start linking the elements together
  gst_element_link_many( source , decoder , colorspace1 , sink , NULL );

  // Set the pipeline to "playing" state
  gst_element_set_state( pipeline , GST_STATE_PLAYING );

I get an Ointernal data flow error¹ as you would see when linking failed.

Any ideas why this might be please ? Does the uridecodebin work any better ?

Thanks for all the help so far :D


Darren 

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