mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-14 13:21:28 +00:00
130 lines
4.9 KiB
Python
130 lines
4.9 KiB
Python
#!/usr/bin/env python
|
|
# -*- Mode: Python -*-
|
|
# vi:si:et:sw=4:sts=4:ts=4
|
|
|
|
# audio concat tool
|
|
# takes in one or more audio files and creates one audio file of the combination
|
|
|
|
# Uses the gnonlin elements (http://gnonlin.sf.net/)
|
|
|
|
import os
|
|
import sys
|
|
import gobject
|
|
import gst
|
|
|
|
from gstfile import Discoverer, time_to_string
|
|
|
|
class AudioSource(gst.Bin):
|
|
"""A bin for audio sources with proper audio converters"""
|
|
|
|
def __init__(self, filename, caps):
|
|
gst.Bin.__init__(self)
|
|
self.filename = filename
|
|
self.outcaps = caps
|
|
|
|
self.filesrc = gst.element_factory_make("filesrc")
|
|
self.filesrc.set_property("location", self.filename)
|
|
self.dbin = gst.element_factory_make("decodebin")
|
|
self.ident = gst.element_factory_make("identity")
|
|
self.audioconvert = gst.element_factory_make("audioconvert")
|
|
self.audioscale = gst.element_factory_make("audioscale")
|
|
|
|
self.add_many(self.filesrc, self.dbin, self.ident,
|
|
self.audioconvert, self.audioscale)
|
|
self.filesrc.link(self.dbin)
|
|
self.audioconvert.link(self.audioscale)
|
|
self.audioscale.link(self.ident, caps)
|
|
self.add_ghost_pad(self.ident.get_pad("src"), "src")
|
|
|
|
self.dbin.connect("new-decoded-pad", self._new_decoded_pad_cb)
|
|
|
|
def _new_decoded_pad_cb(self, dbin, pad, is_last):
|
|
if not "audio" in pad.get_caps().to_string():
|
|
return
|
|
pad.link(self.audioconvert.get_pad("sink"))
|
|
|
|
gobject.type_register(AudioSource)
|
|
|
|
class AudioConcat(gst.Thread):
|
|
"""A Gstreamer thread that concatenates a series of audio files to another audio file"""
|
|
|
|
def __init__(self, infiles, outfile, audioenc="rawvorbisenc", muxer="oggmux"):
|
|
gst.Thread.__init__(self)
|
|
self.infiles = infiles
|
|
self.outfile = outfile
|
|
self.audioenc = gst.element_factory_make(audioenc)
|
|
if not self.audioenc:
|
|
raise NameError, str(audioenc + " audio encoder is not available")
|
|
self.muxer = gst.element_factory_make(muxer)
|
|
if not self.muxer:
|
|
raise NameError, str(muxer + " muxer is not available")
|
|
self.filesink = gst.element_factory_make("filesink")
|
|
self.filesink.set_property("location", self.outfile)
|
|
|
|
self.timeline = gst.element_factory_make("gnltimeline")
|
|
self.audiocomp = gst.element_factory_make("gnlcomposition", "audiocomp")
|
|
|
|
self.audioconvert = gst.element_factory_make("audioconvert")
|
|
self.add_many(self.timeline, self.audioconvert,
|
|
self.audioenc, self.muxer, self.filesink)
|
|
|
|
## identity perfect stream check !
|
|
identity = gst.element_factory_make("identity")
|
|
identity.set_property("check-perfect", True)
|
|
self.add(identity)
|
|
|
|
#self.audioconvert.link(self.audioenc)
|
|
if not self.audioconvert.link(identity):
|
|
print "couldn't link audioconv -> ident"
|
|
if not identity.link(self.audioenc):
|
|
print "couldn't link ident -> audioenc"
|
|
self.audioenc.link(self.muxer)
|
|
self.muxer.link(self.filesink)
|
|
|
|
self.timeline.add(self.audiocomp)
|
|
|
|
caps = gst.caps_from_string("audio/x-raw-int,channels=2,rate=44100,depth=16")
|
|
pos = 0L
|
|
for infile in self.infiles:
|
|
d = Discoverer(infile)
|
|
if not d.audiolength:
|
|
continue
|
|
print "file", infile, "has length", time_to_string(d.audiolength)
|
|
asource = AudioSource(infile, caps)
|
|
gnlsource = gst.element_factory_make("gnlsource")
|
|
gnlsource.set_property("element", asource)
|
|
gnlsource.set_property("media-start", 0L)
|
|
gnlsource.set_property("media-stop", d.audiolength)
|
|
gnlsource.set_property("start", pos)
|
|
gnlsource.set_property("stop", pos + d.audiolength)
|
|
self.audiocomp.add(gnlsource)
|
|
pos += d.audiolength
|
|
|
|
self.timeline.get_pad("src_audiocomp").link(self.audioconvert.get_pad("sink"))
|
|
timelineprobe = gst.Probe(False, self.timelineprobe)
|
|
self.timeline.get_pad("src_audiocomp").add_probe(timelineprobe)
|
|
|
|
def timelineprobe(self, probe, data):
|
|
if isinstance(data, gst.Buffer):
|
|
print "timeline outputs buffer", data.timestamp, data.duration
|
|
else:
|
|
print "timeline ouputs event", data.type
|
|
return True
|
|
|
|
gobject.type_register(AudioConcat)
|
|
|
|
def eos_cb(pipeline):
|
|
sys.exit()
|
|
|
|
if __name__ == "__main__":
|
|
if len(sys.argv) < 3:
|
|
print "Usage : %s <input file(s)> <output file>" % sys.argv[0]
|
|
print "\tCreates an ogg file from all the audio input files"
|
|
sys.exit()
|
|
if not gst.element_factory_make("gnltimeline"):
|
|
print "You need the gnonlin elements installed (http://gnonlin.sf.net/)"
|
|
sys.exit()
|
|
concat = AudioConcat(sys.argv[1:-1], sys.argv[-1])
|
|
concat.connect("eos", eos_cb)
|
|
concat.set_state(gst.STATE_PLAYING)
|
|
gst.main()
|