GStreamer Tutorial 2: Part 2/3 - Streams multimedia using Playbin2

GStreamer Tutorial 2 - 2 Callback function and linking elements

# Add elements to our bin
output_bin.add(decode, convert, solarize, video_sink)

# Link decodebin with autoconvert when its source pad has been created.
decode.connect('new-decoded-pad', on_new_decoded_pad)

# Callback function to link decodebin to autoconvert.
def on_new_decoded_pad(dbin, pad, islast):
    decode = pad.get_parent()
    pipeline = decode.get_parent()
    convert = pipeline.get_by_name('convert')
    decode.link(convert)
    print 'linked!'

# Link the rest of our elements together.
if not gst.element_link_many(convert, solarize, video_sink):
    print 'Not all elements could link.'