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start vidref web version. v4l camera frames to web page is working Ignore-this: 34bcc3b6149a1a3bed31aa5f32a4ddc6
author Drew Perttula <drewp@bigasterisk.com>
date Mon, 03 Jun 2019 09:50:29 +0000
parents 3c523c71da29
children 0dc3715050cf
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1 #!bin/python
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2 """
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3 Camera images of the stage. View live on a web page and also save
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4 them to disk. Retrieve images based on the song and time that was
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5 playing when they were taken. Also, save snapshot images to a place
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6 they can be used again as thumbnails of effects.
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7
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8 bin/vidref main
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9 light9/vidref/videorecorder.py capture frames and save them
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10 light9/vidref/replay.py backend for vidref.js playback element- figures out which frames go with the current song and time
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11 light9/vidref/index.html web ui for watching current stage and song playback
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12 light9/vidref/setup.html web ui for setup of camera params and frame crop
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13 light9/web/vidref.js LitElement for video playback
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14
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15 """
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16 from run_local import log
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17
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18 from twisted.internet import reactor, defer
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19
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20 import logging, optparse, json, base64
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21 import cyclone.web, cyclone.httpclient, cyclone.websocket
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22 from light9 import networking
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23 from light9.vidref.replay import snapshotDir
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24 from light9.vidref import videorecorder
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25 from rdfdb.syncedgraph import SyncedGraph
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26 from io import BytesIO
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27
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28 parser = optparse.OptionParser()
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29 parser.add_option("-v", "--verbose", action="store_true", help="logging.DEBUG")
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30 (options, args) = parser.parse_args()
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31
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32 log.setLevel(logging.DEBUG if options.verbose else logging.INFO)
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33
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34
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35 class Snapshot(cyclone.web.RequestHandler):
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36
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37 @defer.inlineCallbacks
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38 def post(self):
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39 # save next pic
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40 # return /snapshot/path
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41 try:
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42 outputFilename = yield self.settings.gui.snapshot()
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43
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44 assert outputFilename.startswith(snapshotDir())
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45 out = networking.vidref.path(
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46 "snapshot/%s" % outputFilename[len(snapshotDir()):].lstrip('/'))
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47
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48 self.write(json.dumps({'snapshot': out}))
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49 self.set_header("Location", out)
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50 self.set_status(303)
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51 except Exception:
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52 import traceback
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53 traceback.print_exc()
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54 raise
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55
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56
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57 pipeline = videorecorder.GstSource(
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58 '/dev/v4l/by-id/usb-Generic_FULL_HD_1080P_Webcam_200901010001-video-index0')
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59
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60
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61 class Live(cyclone.websocket.WebSocketHandler):
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62
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63 def connectionMade(self, *args, **kwargs):
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64 pipeline.liveImages.subscribe(on_next=self.onFrame)
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65
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66 def connectionLost(self, reason):
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67 0 #self.subj.dispose()
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68
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69 def onFrame(self, t_img):
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70 t, img = t_img
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71 if img is None: return
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72 output = BytesIO()
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73 img.save(output, 'jpeg', quality=80)
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74
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75 self.sendMessage(
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76 json.dumps({
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77 'jpeg':
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78 base64.b64encode(output.getvalue()).decode('ascii'),
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79 'description':
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80 f't={t}',
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81 }))
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82
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83
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84 class SnapshotPic(cyclone.web.StaticFileHandler):
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85 pass
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86
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87
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88 class Time(cyclone.web.RequestHandler):
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89
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90 def put(self):
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91 body = json.loads(self.request.body)
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92 t = body['t']
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93 source = body['source']
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94 self.settings.gui.incomingTime(t, source)
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95 self.set_status(202)
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96
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97
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98 graph = SyncedGraph(networking.rdfdb.url, "vidref")
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99
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100 port = networking.vidref.port
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101 reactor.listenTCP(
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102 port,
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103 cyclone.web.Application(
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104 handlers=[
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105 (r'/()', cyclone.web.StaticFileHandler, {
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106 'path': 'light9/vidref',
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107 'default_filename': 'vidref.html'
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108 }),
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109 (r'/setup/()', cyclone.web.StaticFileHandler, {
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110 'path': 'light9/vidref',
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111 'default_filename': 'setup.html'
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112 }),
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113 (r'/setup/live', Live),
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114 (r'/snapshot', Snapshot),
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115 (r'/snapshot/(.*)', SnapshotPic, {
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116 "path": snapshotDir()
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117 }),
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118 (r'/time', Time),
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119 ],
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120 debug=True,
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121 ))
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122 log.info("serving on %s" % port)
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123
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124 reactor.run()