+#!/usr/bin/env python
+# encoding: utf-8
+
+import sys, os, time, thread
+import glib, gobject, pygst
+import argparse
+pygst.require('0.10')
+import gst
+
+
+loop = glib.MainLoop()
+
+
+class Main(object):
+ def __init__(self):
+ self.transcoder = gst.Pipeline('transcoder')
+
+ self.input_file = gst.element_factory_make('filesrc', 'input-file')
+ self.decoder = gst.element_factory_make('decodebin2', 'decoder')
+ self.decoder.connect('pad-added', self.decoder_pad_added)
+
+ queues = []
+
+ self.video_input_queue = gst.element_factory_make('queue2', 'video-input-queue')
+ queues.append(self.video_input_queue)
+ self.video_encoder = gst.element_factory_make('x264enc', 'video-encoder')
+ self.video_encoder.set_property('speed-preset', 1)
+ self.video_encoder.set_property('tune', 0x00000004)
+ #self.video_encoder.set_property('bitrate', 2048)
+
+ h264parse = gst.element_factory_make('h264parse', 'h264parse')
+ h264parse.set_property('output-format', 1)
+ self.video_output_queue = gst.element_factory_make('queue2', 'video-output-queue')
+ queues.append(self.video_output_queue)
+
+ self.audio_input_queue = gst.element_factory_make('queue2', 'audio-input-queue')
+ queues.append(self.audio_input_queue)
+ audioconvert = gst.element_factory_make('audioconvert', 'audioconvert')
+ self.audio_encoder = gst.element_factory_make('ffenc_mp2', 'audio-encoder')
+ self.audio_output_queue = gst.element_factory_make('queue2', 'audio-output-queue')
+ queues.append(self.audio_output_queue)
+
+ self.muxer = gst.element_factory_make('ffmux_mpegts', 'muxer')
+ self.output_file = gst.element_factory_make('filesink', 'output-file')
+
+ self.transcoder.add(
+ self.input_file,
+ self.decoder,
+ self.video_input_queue,
+ self.video_encoder,
+ h264parse,
+ self.video_output_queue,
+ self.audio_input_queue,
+ audioconvert,
+ self.audio_encoder,
+ self.audio_output_queue,
+ self.muxer,
+ self.output_file
+ )
+
+ for queue in queues:
+ queue.set_property('max-size-buffers', 0)
+ queue.set_property('max-size-bytes', 0)
+ queue.set_property('max-size-time', 0)
+
+ gst.element_link_many(
+ self.input_file,
+ self.decoder
+ )
+
+ gst.element_link_many(
+ self.video_input_queue,
+ self.video_encoder,
+ h264parse,
+ self.video_output_queue,
+ self.muxer
+ )
+
+ gst.element_link_many(
+ self.audio_input_queue,
+ audioconvert,
+ self.audio_encoder,
+ self.audio_output_queue,
+ self.muxer
+ )
+
+ gst.element_link_many(
+ self.muxer,
+ self.output_file
+ )
+
+ bus = self.transcoder.get_bus()
+ bus.add_signal_watch()
+ bus.connect('message', self.on_message)
+
+ def decoder_pad_added(self, decoder, pad):
+ print pad.get_caps()
+ if pad.get_caps().to_string()[0:5] == 'video':
+ pad.link(self.video_input_queue.get_pad('sink'))
+ elif pad.get_caps().to_string()[0:5] == 'audio':
+ pad.link(self.audio_input_queue.get_pad('sink'))
+
+ def on_message(self, bus, message):
+ t = message.type
+ if t == gst.MESSAGE_EOS:
+ self.transcoder.set_state(gst.STATE_NULL)
+ self.playmode = False
+ elif t == gst.MESSAGE_ERROR:
+ self.transcoder.set_state(gst.STATE_NULL)
+ err, debug = message.parse_error()
+ print "Error: %s" % err, debug
+ self.playmode = False
+
+ def start(self, args):
+ if os.path.isfile(args.input):
+ self.playmode = True
+ self.transcoder.get_by_name('input-file').set_property('location', args.input)
+ self.transcoder.get_by_name('output-file').set_property('location', args.output)
+ self.transcoder.set_state(gst.STATE_PLAYING)
+ while self.playmode:
+ time.sleep(1)
+
+ time.sleep(1)
+ loop.quit()
+
+
+if __name__ == "__main__":
+ parser = argparse.ArgumentParser(description='Hylia intelligent media transcoder.')
+ parser.add_argument('input', help='the path or URL of media to be transcoded')
+ parser.add_argument('output', help='the path where transcoded data will be sent (defaults to /dev/null for testing)', nargs='?', default='/dev/null')
+ args = parser.parse_args()
+
+ print args
+
+ mainclass = Main()
+ thread.start_new_thread(mainclass.start, (args,))
+ gobject.threads_init()
+ loop.run()
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