Generate audio samples with Gstreamer 'audiotestsrc' element

gst_generate_samples_audiotestsrc.py

# -*- coding: utf-8 -*-
"""Generate samples with Gstreamer 'audiotestsrc' element"""

import pygst
pygst.require("0.10")
import gobject
import gst

# Initialize gobject in a threading environment
gobject.threads_init()
# GStreamer main loop
mainloop = gobject.MainLoop()

pipeline = gst.Pipeline("pipeline")

audiotestsrc = gst.element_factory_make("audiotestsrc", "audio")
audiotestsrc.set_property('num-buffers', 150)
pipeline.add(audiotestsrc)

encoder = gst.element_factory_make('lame', 'encoder')

filesink = gst.element_factory_make('filesink', 'sink')
filesink.set_property('location', '/tmp/test.mp3')

pipeline.add(encoder, filesink)

gst.element_link_many(audiotestsrc, encoder, filesink)

pipeline.set_state(gst.STATE_PLAYING)


def on_eos_cb(bus, msg):
    """Calback on End-Of-Stream message"""
    mainloop.quit()
    pipeline.set_state(gst.STATE_NULL)

bus = pipeline.get_bus()
bus.add_signal_watch()
bus.connect('message::eos', on_eos_cb)

mainloop.run()