plugins/video/transcode.py

   1 import subprocess, shutil, os, re, sys, ConfigParser, time, lrucache
   2 import config
   3
   4 info_cache = lrucache.LRUCache(1000)
   5
   6
   7 debug = config.getDebug()
   8 MAX_VIDEO_BR = config.getMaxVideoBR()
   9 BUFF_SIZE = config.getBuffSize()
  10
  11 FFMPEG = config.get('Server', 'ffmpeg')
  12
  13 def debug_write(data):
  14     if debug:
  15         debug_out = []
  16         for x in data:
  17             debug_out.append(str(x))
  18         fdebug = open('debug.txt', 'a')
  19         fdebug.write(' '.join(debug_out))
  20         fdebug.close()
  21
  22 # XXX BIG HACK
  23 # subprocess is broken for me on windows so super hack
  24 def patchSubprocess():
  25     o = subprocess.Popen._make_inheritable
  26
  27     def _make_inheritable(self, handle):
  28         if not handle: return subprocess.GetCurrentProcess()
  29         return o(self, handle)
  30
  31     subprocess.Popen._make_inheritable = _make_inheritable
  32 mswindows = (sys.platform == "win32")
  33 if mswindows:
  34     patchSubprocess()
  35
  36 def output_video(inFile, outFile, tsn=''):
  37     if tivo_compatable(inFile):
  38         debug_write(['output_video: ', inFile, ' is tivo compatible\n'])
  39         f = file(inFile, 'rb')
  40         shutil.copyfileobj(f, outFile)
  41         f.close()
  42     else:
  43         debug_write(['output_video: ', inFile, ' is not tivo compatible\n'])
  44         transcode(inFile, outFile, tsn)
  45
  46 def transcode(inFile, outFile, tsn=''):
  47
  48     settings = {}
  49     settings['audio_br'] = config.getAudioBR(tsn)
  50     settings['video_br'] = config.getVideoBR(tsn)
  51     settings['max_video_br'] = MAX_VIDEO_BR
  52     settings['buff_size'] = BUFF_SIZE
  53     settings['aspect_ratio'] = ' '.join(select_aspect(inFile, tsn))
  54
  55     cmd_string = config.getFFMPEGTemplate(tsn) % settings
  56
  57     cmd = [FFMPEG, '-i', inFile] + cmd_string.split()
  58
  59     debug_write(['transcode: ffmpeg command is ', ' '.join(cmd), '\n'])
  60     ffmpeg = subprocess.Popen(cmd, stdout=subprocess.PIPE)
  61     try:
  62         shutil.copyfileobj(ffmpeg.stdout, outFile)
  63     except:
  64         kill(ffmpeg.pid)
  65
  66 def select_aspect(inFile, tsn = ''):
  67     TIVO_WIDTH = config.getTivoWidth(tsn)
  68     TIVO_HEIGHT = config.getTivoHeight(tsn)
  69
  70     type, width, height, fps, millisecs =  video_info(inFile)
  71
  72     debug_write(['tsn:', tsn, '\n'])
  73
  74     aspect169 = config.get169Setting(tsn)
  75
  76     debug_write(['aspect169:', aspect169, '\n'])
  77
  78     optres = config.getOptres()
  79
  80     debug_write(['optres:', optres, '\n'])
  81
  82     if optres:
  83         optHeight = Config.nearestTivoHeight(height)
  84         optWidth = Config.nearestTivoWidth(width)
  85         if optHeight < TIVO_HEIGHT:
  86             TIVO_HEIGHT = optHeight
  87         if optWidth < TIVO_WIDTH:
  88             TIVO_WIDTH = optWidth
  89
  90     d = gcd(height,width)
  91     ratio = (width*100)/height
  92     rheight, rwidth = height/d, width/d
  93
  94     debug_write(['select_aspect: File=', inFile, ' Type=', type, ' width=', width, ' height=', height, ' fps=', fps, ' millisecs=', millisecs, ' ratio=', ratio, ' rheight=', rheight, ' rwidth=', rwidth, ' TIVO_HEIGHT=', TIVO_HEIGHT, 'TIVO_WIDTH=', TIVO_WIDTH, '\n'])
  95
  96     multiplier16by9 = (16.0 * TIVO_HEIGHT) / (9.0 * TIVO_WIDTH)
  97     multiplier4by3  =  (4.0 * TIVO_HEIGHT) / (3.0 * TIVO_WIDTH)
  98
  99     if (rwidth, rheight) in [(4, 3), (10, 11), (15, 11), (59, 54), (59, 72), (59, 36), (59, 54)]:
 100         debug_write(['select_aspect: File is within 4:3 list.\n'])
 101         return ['-aspect', '4:3', '-s', str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT)]
 102     elif ((rwidth, rheight) in [(16, 9), (20, 11), (40, 33), (118, 81), (59, 27)]) and aspect169:
 103         debug_write(['select_aspect: File is within 16:9 list and 16:9 allowed.\n'])
 104         return ['-aspect', '16:9', '-s', str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT)]
 105     else:
 106         settings = []
 107         #If video is wider than 4:3 add top and bottom padding
 108         if (ratio > 133): #Might be 16:9 file, or just need padding on top and bottom
 109             if aspect169 and (ratio > 135): #If file would fall in 4:3 assume it is supposed to be 4:3
 110                 if (ratio > 177):#too short needs padding top and bottom
 111                     endHeight = int(((TIVO_WIDTH*height)/width) * multiplier16by9)
 112                     settings.append('-aspect')
 113                     settings.append('16:9')
 114                     if endHeight % 2:
 115                         endHeight -= 1
 116                     if endHeight < TIVO_HEIGHT * 0.99:
 117                         settings.append('-s')
 118                         settings.append(str(TIVO_WIDTH) + 'x' + str(endHeight))
 119
 120                         topPadding = ((TIVO_HEIGHT - endHeight)/2)
 121                         if topPadding % 2:
 122                             topPadding -= 1
 123
 124                         settings.append('-padtop')
 125                         settings.append(str(topPadding))
 126                         bottomPadding = (TIVO_HEIGHT - endHeight) - topPadding
 127                         settings.append('-padbottom')
 128                         settings.append(str(bottomPadding))
 129                     else:   #if only very small amount of padding needed, then just stretch it
 130                         settings.append('-s')
 131                         settings.append(str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT))
 132                     debug_write(['select_aspect: 16:9 aspect allowed, file is wider than 16:9 padding top and bottom\n', ' '.join(settings), '\n'])
 133                 else: #too skinny needs padding on left and right.
 134                     endWidth = int((TIVO_HEIGHT*width)/(height*multiplier16by9))
 135                     settings.append('-aspect')
 136                     settings.append('16:9')
 137                     if endWidth % 2:
 138                         endWidth -= 1
 139                     if endWidth < (TIVO_WIDTH-10):
 140                         settings.append('-s')
 141                         settings.append(str(endWidth) + 'x' + str(TIVO_HEIGHT))
 142
 143                         leftPadding = ((TIVO_WIDTH - endWidth)/2)
 144                         if leftPadding % 2:
 145                             leftPadding -= 1
 146
 147                         settings.append('-padleft')
 148                         settings.append(str(leftPadding))
 149                         rightPadding = (TIVO_WIDTH - endWidth) - leftPadding
 150                         settings.append('-padright')
 151                         settings.append(str(rightPadding))
 152                     else: #if only very small amount of padding needed, then just stretch it
 153                         settings.append('-s')
 154                         settings.append(str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT))
 155                     debug_write(['select_aspect: 16:9 aspect allowed, file is narrower than 16:9 padding left and right\n', ' '.join(settings), '\n'])
 156             else: #this is a 4:3 file or 16:9 output not allowed
 157                 settings.append('-aspect')
 158                 settings.append('4:3')
 159                 endHeight = int(((TIVO_WIDTH*height)/width) * multiplier4by3)
 160                 if endHeight % 2:
 161                     endHeight -= 1
 162                 if endHeight < TIVO_HEIGHT * 0.99:
 163                     settings.append('-s')
 164                     settings.append(str(TIVO_WIDTH) + 'x' + str(endHeight))
 165
 166                     topPadding = ((TIVO_HEIGHT - endHeight)/2)
 167                     if topPadding % 2:
 168                         topPadding -= 1
 169
 170                     settings.append('-padtop')
 171                     settings.append(str(topPadding))
 172                     bottomPadding = (TIVO_HEIGHT - endHeight) - topPadding
 173                     settings.append('-padbottom')
 174                     settings.append(str(bottomPadding))
 175                 else:   #if only very small amount of padding needed, then just stretch it
 176                     settings.append('-s')
 177                     settings.append(str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT))
 178                 debug_write(['select_aspect: File is wider than 4:3 padding top and bottom\n', ' '.join(settings), '\n'])
 179
 180             return settings
 181         #If video is taller than 4:3 add left and right padding, this is rare. All of these files will always be sent in
 182         #an aspect ratio of 4:3 since they are so narrow.
 183         else:
 184             endWidth = int((TIVO_HEIGHT*width)/(height*multiplier4by3))
 185             settings.append('-aspect')
 186             settings.append('4:3')
 187             if endWidth % 2:
 188                 endWidth -= 1
 189             if endWidth < (TIVO_WIDTH * 0.99):
 190                 settings.append('-s')
 191                 settings.append(str(endWidth) + 'x' + str(TIVO_HEIGHT))
 192
 193                 leftPadding = ((TIVO_WIDTH - endWidth)/2)
 194                 if leftPadding % 2:
 195                     leftPadding -= 1
 196
 197                 settings.append('-padleft')
 198                 settings.append(str(leftPadding))
 199                 rightPadding = (TIVO_WIDTH - endWidth) - leftPadding
 200                 settings.append('-padright')
 201                 settings.append(str(rightPadding))
 202             else: #if only very small amount of padding needed, then just stretch it
 203                 settings.append('-s')
 204                 settings.append(str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT))
 205
 206             debug_write(['select_aspect: File is taller than 4:3 padding left and right\n', ' '.join(settings), '\n'])
 207
 208             return settings
 209
 210 def tivo_compatable(inFile):
 211     suportedModes = [[720, 480], [704, 480], [544, 480], [480, 480], [352, 480]]
 212     type, width, height, fps, millisecs =  video_info(inFile)
 213     #print type, width, height, fps, millisecs
 214
 215     if (inFile[-5:]).lower() == '.tivo':
 216         debug_write(['tivo_compatible: ', inFile, ' ends with .tivo\n'])
 217         return True
 218
 219     if not type == 'mpeg2video':
 220         #print 'Not Tivo Codec'
 221         debug_write(['tivo_compatible: ', inFile, ' is not mpeg2video it is ', type, '\n'])
 222         return False
 223
 224     if not fps == '29.97':
 225         #print 'Not Tivo fps'
 226         debug_write(['tivo_compatible: ', inFile, ' is not correct fps it is ', fps, '\n'])
 227         return False
 228
 229     for mode in suportedModes:
 230         if (mode[0], mode[1]) == (width, height):
 231             #print 'Is TiVo!'
 232             debug_write(['tivo_compatible: ', inFile, ' has correct width of ', width, ' and height of ', height, '\n'])
 233             return True
 234         #print 'Not Tivo dimensions'
 235     return False
 236
 237 def video_info(inFile):
 238     mtime = os.stat(inFile).st_mtime
 239     if inFile in info_cache and info_cache[inFile][0] == mtime:
 240         debug_write(['video_info: ', inFile, ' cache hit!', '\n'])
 241         return info_cache[inFile][1]
 242
 243     if (inFile[-5:]).lower() == '.tivo':
 244         info_cache[inFile] = (mtime, (True, True, True, True, True))
 245         debug_write(['video_info: ', inFile, ' ends in .tivo.\n'])
 246         return True, True, True, True, True
 247
 248     cmd = [FFMPEG, '-i', inFile ]
 249     ffmpeg = subprocess.Popen(cmd, stderr=subprocess.PIPE, stdout=subprocess.PIPE, stdin=subprocess.PIPE)
 250
 251     # wait 4 sec if ffmpeg is not back give up
 252     for i in range(80):
 253         time.sleep(.05)
 254         if not ffmpeg.poll() == None:
 255             break
 256
 257     if ffmpeg.poll() == None:
 258         kill(ffmpeg.pid)
 259         info_cache[inFile] = (mtime, (None, None, None, None, None))
 260         return None, None, None, None, None
 261
 262     output = ffmpeg.stderr.read()
 263     debug_write(['video_info: ffmpeg output=', output, '\n'])
 264
 265     rezre = re.compile(r'.*Video: ([^,]+),.*')
 266     x = rezre.search(output)
 267     if x:
 268         codec = x.group(1)
 269     else:
 270         info_cache[inFile] = (mtime, (None, None, None, None, None))
 271         debug_write(['video_info: failed at codec\n'])
 272         return None, None, None, None, None
 273
 274     rezre = re.compile(r'.*Video: .+, (\d+)x(\d+)[, ].*')
 275     x = rezre.search(output)
 276     if x:
 277         width = int(x.group(1))
 278         height = int(x.group(2))
 279     else:
 280         info_cache[inFile] = (mtime, (None, None, None, None, None))
 281         debug_write(['video_info: failed at width/height\n'])
 282         return None, None, None, None, None
 283
 284     rezre = re.compile(r'.*Video: .+, (.+) (?:fps|tb).*')
 285     x = rezre.search(output)
 286     if x:
 287         fps = x.group(1)
 288     else:
 289         info_cache[inFile] = (mtime, (None, None, None, None, None))
 290         debug_write(['video_info: failed at fps\n'])
 291         return None, None, None, None, None
 292
 293     # Allow override only if it is mpeg2 and frame rate was doubled to 59.94
 294     if (not fps == '29.97') and (codec == 'mpeg2video'):
 295         # First look for the build 7215 version
 296         rezre = re.compile(r'.*film source: 29.97.*')
 297         x = rezre.search(output.lower() )
 298         if x:
 299             debug_write(['video_info: film source: 29.97 setting fps to 29.97\n'])
 300             fps = '29.97'
 301         else:
 302             # for build 8047:
 303             rezre = re.compile(r'.*frame rate differs from container frame rate: 29.97.*')
 304             debug_write(['video_info: Bug in VideoReDo\n'])
 305             x = rezre.search(output.lower() )
 306             if x:
 307                 fps = '29.97'
 308
 309     durre = re.compile(r'.*Duration: (.{2}):(.{2}):(.{2})\.(.),')
 310     d = durre.search(output)
 311     if d:
 312         millisecs = ((int(d.group(1))*3600) + (int(d.group(2))*60) + int(d.group(3)))*1000 + (int(d.group(4))*100)
 313     else:
 314         millisecs = 0
 315
 316     info_cache[inFile] = (mtime, (codec, width, height, fps, millisecs))
 317     debug_write(['video_info: Codec=', codec, ' width=', width, ' height=', height, ' fps=', fps, ' millisecs=', millisecs, '\n'])
 318     return codec, width, height, fps, millisecs
 319
 320 def suported_format(inFile):
 321     if video_info(inFile)[0]:
 322         return True
 323     else:
 324         debug_write(['supported_format: ', inFile, ' is not supported\n'])
 325         return False
 326
 327 def kill(pid):
 328     debug_write(['kill: killing pid=', str(pid), '\n'])
 329     if mswindows:
 330         win32kill(pid)
 331     else:
 332         import os, signal
 333         os.kill(pid, signal.SIGTERM)
 334 def win32kill(pid):
 335         import ctypes
 336         handle = ctypes.windll.kernel32.OpenProcess(1, False, pid)
 337         ctypes.windll.kernel32.TerminateProcess(handle, -1)
 338         ctypes.windll.kernel32.CloseHandle(handle)
 339
 340 def gcd(a,b):
 341     while b:
 342         a, b = b, a % b
 343     return a
 344