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74f550caf0
Original commit message from CVS: 2005-07-12 Andy Wingo <wingo@pobox.com> * configure.ac (AC_CONFIG_FILES): * examples/: Moved all examples up from examples/gst/ into examples/.
129 lines
4.8 KiB
Python
129 lines
4.8 KiB
Python
#!/usr/bin/env python
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# audio concat tool
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# takes in one or more audio files and creates one audio file of the combination
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# Uses the gnonlin elements (http://gnonlin.sf.net/)
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import os
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import sys
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import gobject
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import gst
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from gstfile import Discoverer, time_to_string
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class AudioSource(gst.Bin):
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"""A bin for audio sources with proper audio converters"""
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def __init__(self, filename, caps):
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gst.Bin.__init__(self)
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self.filename = filename
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self.outcaps = caps
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self.filesrc = gst.element_factory_make("filesrc")
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self.filesrc.set_property("location", self.filename)
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self.dbin = gst.element_factory_make("decodebin")
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self.ident = gst.element_factory_make("identity")
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self.audioconvert = gst.element_factory_make("audioconvert")
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self.audioscale = gst.element_factory_make("audioscale")
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self.add_many(self.filesrc, self.dbin, self.ident,
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self.audioconvert, self.audioscale)
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self.filesrc.link(self.dbin)
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self.audioconvert.link(self.audioscale)
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self.audioscale.link(self.ident, caps)
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self.add_ghost_pad(self.ident.get_pad("src"), "src")
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self.dbin.connect("new-decoded-pad", self._new_decoded_pad_cb)
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def _new_decoded_pad_cb(self, dbin, pad, is_last):
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if not "audio" in pad.get_caps().to_string():
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return
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pad.link(self.audioconvert.get_pad("sink"))
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gobject.type_register(AudioSource)
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class AudioConcat(gst.Thread):
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"""A Gstreamer thread that concatenates a series of audio files to another audio file"""
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def __init__(self, infiles, outfile, audioenc="rawvorbisenc", muxer="oggmux"):
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gst.Thread.__init__(self)
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self.infiles = infiles
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self.outfile = outfile
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self.audioenc = gst.element_factory_make(audioenc)
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if not self.audioenc:
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raise NameError, str(audioenc + " audio encoder is not available")
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self.muxer = gst.element_factory_make(muxer)
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if not self.muxer:
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raise NameError, str(muxer + " muxer is not available")
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self.filesink = gst.element_factory_make("filesink")
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self.filesink.set_property("location", self.outfile)
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self.timeline = gst.element_factory_make("gnltimeline")
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self.audiocomp = gst.element_factory_make("gnlcomposition", "audiocomp")
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self.audioconvert = gst.element_factory_make("audioconvert")
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self.add_many(self.timeline, self.audioconvert,
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self.audioenc, self.muxer, self.filesink)
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## identity perfect stream check !
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identity = gst.element_factory_make("identity")
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identity.set_property("check-perfect", True)
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self.add(identity)
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#self.audioconvert.link(self.audioenc)
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if not self.audioconvert.link(identity):
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print "couldn't link audioconv -> ident"
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if not identity.link(self.audioenc):
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print "couldn't link ident -> audioenc"
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self.audioenc.link(self.muxer)
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self.muxer.link(self.filesink)
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self.timeline.add(self.audiocomp)
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caps = gst.caps_from_string("audio/x-raw-int,channels=2,rate=44100,depth=16")
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pos = 0L
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for infile in self.infiles:
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d = Discoverer(infile)
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if not d.audiolength:
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continue
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print "file", infile, "has length", time_to_string(d.audiolength)
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asource = AudioSource(infile, caps)
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gnlsource = gst.element_factory_make("gnlsource")
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gnlsource.set_property("element", asource)
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gnlsource.set_property("media-start", 0L)
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gnlsource.set_property("media-stop", d.audiolength)
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gnlsource.set_property("start", pos)
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gnlsource.set_property("stop", pos + d.audiolength)
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self.audiocomp.add(gnlsource)
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pos += d.audiolength
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self.timeline.get_pad("src_audiocomp").link(self.audioconvert.get_pad("sink"))
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timelineprobe = gst.Probe(False, self.timelineprobe)
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self.timeline.get_pad("src_audiocomp").add_probe(timelineprobe)
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def timelineprobe(self, probe, data):
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if isinstance(data, gst.Buffer):
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print "timeline outputs buffer", data.timestamp, data.duration
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else:
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print "timeline ouputs event", data.type
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return True
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gobject.type_register(AudioConcat)
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def eos_cb(pipeline):
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sys.exit()
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if __name__ == "__main__":
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if len(sys.argv) < 3:
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print "Usage : %s <input file(s)> <output file>" % sys.argv[0]
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print "\tCreates an ogg file from all the audio input files"
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sys.exit()
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if not gst.element_factory_make("gnltimeline"):
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print "You need the gnonlin elements installed (http://gnonlin.sf.net/)"
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sys.exit()
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concat = AudioConcat(sys.argv[1:-1], sys.argv[-1])
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concat.connect("eos", eos_cb)
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concat.set_state(gst.STATE_PLAYING)
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gst.main()
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