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path: root/voctocore/lib/avpreviewoutput.py
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  1. #!/usr/bin/python3
  2. import logging
  3. from gi.repository import Gst
  4. from lib.config import Config
  5. from lib.tcpmulticonnection import TCPMultiConnection
  6. class AVPreviewOutput(TCPMultiConnection):
  7. def __init__(self, channel, port):
  8. self.log = logging.getLogger('AVPreviewOutput['+channel+']')
  9. super().__init__(port)
  10. self.channel = channel
  11. if Config.has_option('previews', 'videocaps'):
  12. vcaps_out = Config.get('previews', 'videocaps')
  13. else:
  14. vcaps_out = Config.get('mix', 'videocaps')
  15. pipeline = """
  16. interaudiosrc channel=audio_{channel} !
  17. {acaps} !
  18. queue !
  19. mux.
  20. intervideosrc channel=video_{channel} !
  21. {vcaps_in} !
  22. videorate !
  23. videoscale method=nearest-neighbour !
  24. {vcaps_out} !
  25. jpegenc !
  26. queue !
  27. mux.
  28. matroskamux
  29. name=mux
  30. streamable=true
  31. writing-app=Voctomix-AVPreviewOutput !
  32. multifdsink
  33. buffers-max=500
  34. sync-method=next-keyframe
  35. name=fd
  36. """.format(
  37. channel=self.channel,
  38. acaps=Config.get('mix', 'audiocaps'),
  39. vcaps_in=Config.get('mix', 'videocaps'),
  40. vcaps_out=vcaps_out
  41. )
  42. self.log.debug('Creating Output-Pipeline:\n%s', pipeline)
  43. self.outputPipeline = Gst.parse_launch(pipeline)
  44. self.log.debug('Binding Error & End-of-Stream-Signal on Output-Pipeline')
  45. self.outputPipeline.bus.add_signal_watch()
  46. self.outputPipeline.bus.connect("message::eos", self.on_eos)
  47. self.outputPipeline.bus.connect("message::error", self.on_error)
  48. self.log.debug('Launching Output-Pipeline')
  49. self.outputPipeline.set_state(Gst.State.PLAYING)
  50. def on_accepted(self, conn, addr):
  51. self.log.debug('Adding fd %u to multifdsink', conn.fileno())
  52. fdsink = self.outputPipeline.get_by_name('fd')
  53. fdsink.emit('add', conn.fileno())
  54. def on_disconnect(multifdsink, fileno):
  55. if fileno == conn.fileno():
  56. self.log.debug('fd %u removed from multifdsink', fileno)
  57. self.close_connection(conn)
  58. fdsink.connect('client-fd-removed', on_disconnect)
  59. def on_eos(self, bus, message):
  60. self.log.debug('Received End-of-Stream-Signal on Output-Pipeline')
  61. def on_error(self, bus, message):
  62. self.log.debug('Received Error-Signal on Output-Pipeline')
  63. (error, debug) = message.parse_error()
  64. self.log.debug('Error-Details: #%u: %s', error.code, debug)