plugins/video/transcode.py

   1 import subprocess, shutil, os, re, sys, ConfigParser, time, lrucache
   2 import config
   3 from debug import debug_write, fn_attr
   4
   5 info_cache = lrucache.LRUCache(1000)
   6 videotest = os.path.join(os.path.dirname(__file__), 'videotest.mpg')
   7
   8 def ffmpeg_path():
   9     return config.get('Server', 'ffmpeg')
  10
  11 # XXX BIG HACK
  12 # subprocess is broken for me on windows so super hack
  13 def patchSubprocess():
  14     o = subprocess.Popen._make_inheritable
  15
  16     def _make_inheritable(self, handle):
  17         if not handle: return subprocess.GetCurrentProcess()
  18         return o(self, handle)
  19
  20     subprocess.Popen._make_inheritable = _make_inheritable
  21 mswindows = (sys.platform == "win32")
  22 if mswindows:
  23     patchSubprocess()
  24
  25 def output_video(inFile, outFile, tsn=''):
  26     if tivo_compatable(inFile, tsn):
  27         debug_write(__name__, fn_attr(), [inFile, ' is tivo compatible'])
  28         f = file(inFile, 'rb')
  29         shutil.copyfileobj(f, outFile)
  30         f.close()
  31     else:
  32         debug_write(__name__, fn_attr(), [inFile, ' is not tivo compatible'])
  33         transcode(inFile, outFile, tsn)
  34
  35 def transcode(inFile, outFile, tsn=''):
  36
  37     settings = {}
  38     settings['video_codec'] = select_videocodec(tsn)
  39     settings['video_br'] = select_videobr(tsn)
  40     settings['video_fps'] = select_videofps(tsn)
  41     settings['max_video_br'] = select_maxvideobr()
  42     settings['buff_size'] = select_buffsize()
  43     settings['aspect_ratio'] = ' '.join(select_aspect(inFile, tsn))
  44     settings['audio_br'] = select_audiobr(tsn)
  45     settings['audio_fr'] = select_audiofr(inFile, tsn)
  46     settings['audio_ch'] = select_audioch(tsn)
  47     settings['audio_codec'] = select_audiocodec(inFile, tsn)
  48     settings['ffmpeg_pram'] = select_ffmpegprams(tsn)
  49     settings['format'] = select_format(tsn)
  50
  51     cmd_string = config.getFFmpegTemplate(tsn) % settings
  52
  53     cmd = [ffmpeg_path(), '-i', inFile] + cmd_string.split()
  54     print 'transcoding to tivo model '+tsn[:3]+' using ffmpeg command:'
  55     print ' '.join(cmd)
  56     debug_write(__name__, fn_attr(), ['ffmpeg command is ', ' '.join(cmd)])
  57     ffmpeg = subprocess.Popen(cmd, stdout=subprocess.PIPE)
  58     try:
  59         shutil.copyfileobj(ffmpeg.stdout, outFile)
  60     except:
  61         kill(ffmpeg.pid)
  62
  63 def select_audiocodec(inFile, tsn = ''):
  64     # Default, compatible with all TiVo's
  65     codec = 'ac3'
  66     if config.getAudioCodec(tsn) == None:
  67         type, width, height, fps, millisecs, kbps, akbps, acodec, afreq =  video_info(inFile)
  68         if acodec in ('ac3', 'liba52', 'mp2'):
  69             if akbps == None:
  70                 cmd_string = '-y -vcodec mpeg2video -r 29.97 -b 1000k -acodec copy -t 00:00:01 -f vob -'
  71                 if video_check(inFile, cmd_string):
  72                     type, width, height, fps, millisecs, kbps, akbps, acodec, afreq =  video_info(videotest)
  73             if not akbps == None and int(akbps) <= config.getMaxAudioBR(tsn):
  74                 # compatible codec and bitrate, do not reencode audio
  75                 codec = 'copy'
  76     else:
  77         codec = config.getAudioCodec(tsn)
  78     return '-acodec '+codec
  79
  80 def select_audiofr(inFile, tsn):
  81     freq = '48000'  #default
  82     type, width, height, fps, millisecs, kbps, akbps, acodec, afreq =  video_info(inFile)
  83     if not afreq == None and afreq in ('44100', '48000'):
  84         # compatible frequency
  85         freq = afreq
  86     if config.getAudioFR(tsn) != None:
  87         freq = config.getAudioFR(tsn)
  88     return '-ar '+freq
  89
  90 def select_audioch(tsn):
  91     if config.getAudioCH(tsn) != None:
  92         return '-ac '+config.getAudioCH(tsn)
  93     return ''
  94
  95 def select_videofps(tsn):
  96     vfps = '-r 29.97'  #default
  97     if config.isHDtivo(tsn):
  98         vfps = ' '
  99     if config.getVideoFPS(tsn) != None:
 100         vfps = '-r '+config.getVideoFPS(tsn)
 101     return vfps
 102
 103 def select_videocodec(tsn):
 104     vcodec = 'mpeg2video'  #default
 105     if config.getVideoCodec(tsn) != None:
 106         vcodec = config.getVideoCodec(tsn)
 107     return '-vcodec '+vcodec
 108
 109 def select_videobr(tsn):
 110     return '-b '+config.getVideoBR(tsn)
 111
 112 def select_audiobr(tsn):
 113     return '-ab '+config.getAudioBR(tsn)
 114
 115 def select_maxvideobr():
 116     return '-maxrate '+config.getMaxVideoBR()
 117
 118 def select_buffsize():
 119     return '-bufsize '+config.getBuffSize()
 120
 121 def select_ffmpegprams(tsn):
 122     if config.getFFmpegPrams(tsn) != None:
 123         return config.getFFmpegPrams(tsn)
 124     return ''
 125
 126 def select_format(tsn):
 127     fmt = 'vob'
 128     if config.getFormat(tsn) != None:
 129         fmt = config.getFormat(tsn)
 130     return '-f '+fmt+' -'
 131
 132 def select_aspect(inFile, tsn = ''):
 133     TIVO_WIDTH = config.getTivoWidth(tsn)
 134     TIVO_HEIGHT = config.getTivoHeight(tsn)
 135
 136     type, width, height, fps, millisecs, kbps, akbps, acodec, afreq =  video_info(inFile)
 137
 138     debug_write(__name__, fn_attr(), ['tsn:', tsn])
 139
 140     aspect169 = config.get169Setting(tsn)
 141
 142     debug_write(__name__, fn_attr(), ['aspect169:', aspect169])
 143
 144     optres = config.getOptres(tsn)
 145
 146     debug_write(__name__, fn_attr(), ['optres:', optres])
 147
 148     if optres:
 149         optHeight = config.nearestTivoHeight(height)
 150         optWidth = config.nearestTivoWidth(width)
 151         if optHeight < TIVO_HEIGHT:
 152             TIVO_HEIGHT = optHeight
 153         if optWidth < TIVO_WIDTH:
 154             TIVO_WIDTH = optWidth
 155
 156     d = gcd(height,width)
 157     ratio = (width*100)/height
 158     rheight, rwidth = height/d, width/d
 159
 160     debug_write(__name__, fn_attr(), ['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])
 161
 162     multiplier16by9 = (16.0 * TIVO_HEIGHT) / (9.0 * TIVO_WIDTH)
 163     multiplier4by3  =  (4.0 * TIVO_HEIGHT) / (3.0 * TIVO_WIDTH)
 164
 165     if config.isHDtivo(tsn) and height <= TIVO_HEIGHT and not optres:
 166         return [] #pass all resolutions to S3/HD, except heights greater than conf height
 167                 # else, optres is enabled and resizes SD video to the "S2" standard on S3/HD.
 168     elif (rwidth, rheight) in [(4, 3), (10, 11), (15, 11), (59, 54), (59, 72), (59, 36), (59, 54)]:
 169         debug_write(__name__, fn_attr(), ['File is within 4:3 list.'])
 170         return ['-aspect', '4:3', '-s', str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT)]
 171     elif ((rwidth, rheight) in [(16, 9), (20, 11), (40, 33), (118, 81), (59, 27)]) and aspect169:
 172         debug_write(__name__, fn_attr(), ['File is within 16:9 list and 16:9 allowed.'])
 173         return ['-aspect', '16:9', '-s', str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT)]
 174     else:
 175         settings = []
 176         #If video is wider than 4:3 add top and bottom padding
 177         if (ratio > 133): #Might be 16:9 file, or just need padding on top and bottom
 178             if aspect169 and (ratio > 135): #If file would fall in 4:3 assume it is supposed to be 4:3
 179                 if (ratio > 177):#too short needs padding top and bottom
 180                     endHeight = int(((TIVO_WIDTH*height)/width) * multiplier16by9)
 181                     settings.append('-aspect')
 182                     settings.append('16:9')
 183                     if endHeight % 2:
 184                         endHeight -= 1
 185                     if endHeight < TIVO_HEIGHT * 0.99:
 186                         settings.append('-s')
 187                         settings.append(str(TIVO_WIDTH) + 'x' + str(endHeight))
 188
 189                         topPadding = ((TIVO_HEIGHT - endHeight)/2)
 190                         if topPadding % 2:
 191                             topPadding -= 1
 192
 193                         settings.append('-padtop')
 194                         settings.append(str(topPadding))
 195                         bottomPadding = (TIVO_HEIGHT - endHeight) - topPadding
 196                         settings.append('-padbottom')
 197                         settings.append(str(bottomPadding))
 198                     else:   #if only very small amount of padding needed, then just stretch it
 199                         settings.append('-s')
 200                         settings.append(str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT))
 201                     debug_write(__name__, fn_attr(), ['16:9 aspect allowed, file is wider than 16:9 padding top and bottom', ' '.join(settings)])
 202                 else: #too skinny needs padding on left and right.
 203                     endWidth = int((TIVO_HEIGHT*width)/(height*multiplier16by9))
 204                     settings.append('-aspect')
 205                     settings.append('16:9')
 206                     if endWidth % 2:
 207                         endWidth -= 1
 208                     if endWidth < (TIVO_WIDTH-10):
 209                         settings.append('-s')
 210                         settings.append(str(endWidth) + 'x' + str(TIVO_HEIGHT))
 211
 212                         leftPadding = ((TIVO_WIDTH - endWidth)/2)
 213                         if leftPadding % 2:
 214                             leftPadding -= 1
 215
 216                         settings.append('-padleft')
 217                         settings.append(str(leftPadding))
 218                         rightPadding = (TIVO_WIDTH - endWidth) - leftPadding
 219                         settings.append('-padright')
 220                         settings.append(str(rightPadding))
 221                     else: #if only very small amount of padding needed, then just stretch it
 222                         settings.append('-s')
 223                         settings.append(str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT))
 224                     debug_write(__name__, fn_attr(), ['16:9 aspect allowed, file is narrower than 16:9 padding left and right\n', ' '.join(settings)])
 225             else: #this is a 4:3 file or 16:9 output not allowed
 226                 settings.append('-aspect')
 227                 settings.append('4:3')
 228                 endHeight = int(((TIVO_WIDTH*height)/width) * multiplier4by3)
 229                 if endHeight % 2:
 230                     endHeight -= 1
 231                 if endHeight < TIVO_HEIGHT * 0.99:
 232                     settings.append('-s')
 233                     settings.append(str(TIVO_WIDTH) + 'x' + str(endHeight))
 234
 235                     topPadding = ((TIVO_HEIGHT - endHeight)/2)
 236                     if topPadding % 2:
 237                         topPadding -= 1
 238
 239                     settings.append('-padtop')
 240                     settings.append(str(topPadding))
 241                     bottomPadding = (TIVO_HEIGHT - endHeight) - topPadding
 242                     settings.append('-padbottom')
 243                     settings.append(str(bottomPadding))
 244                 else:   #if only very small amount of padding needed, then just stretch it
 245                     settings.append('-s')
 246                     settings.append(str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT))
 247                 debug_write(__name__, fn_attr(), ['File is wider than 4:3 padding top and bottom\n', ' '.join(settings)])
 248
 249             return settings
 250         #If video is taller than 4:3 add left and right padding, this is rare. All of these files will always be sent in
 251         #an aspect ratio of 4:3 since they are so narrow.
 252         else:
 253             endWidth = int((TIVO_HEIGHT*width)/(height*multiplier4by3))
 254             settings.append('-aspect')
 255             settings.append('4:3')
 256             if endWidth % 2:
 257                 endWidth -= 1
 258             if endWidth < (TIVO_WIDTH * 0.99):
 259                 settings.append('-s')
 260                 settings.append(str(endWidth) + 'x' + str(TIVO_HEIGHT))
 261
 262                 leftPadding = ((TIVO_WIDTH - endWidth)/2)
 263                 if leftPadding % 2:
 264                     leftPadding -= 1
 265
 266                 settings.append('-padleft')
 267                 settings.append(str(leftPadding))
 268                 rightPadding = (TIVO_WIDTH - endWidth) - leftPadding
 269                 settings.append('-padright')
 270                 settings.append(str(rightPadding))
 271             else: #if only very small amount of padding needed, then just stretch it
 272                 settings.append('-s')
 273                 settings.append(str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT))
 274
 275             debug_write(__name__, fn_attr(), ['File is taller than 4:3 padding left and right\n', ' '.join(settings)])
 276
 277             return settings
 278
 279 def tivo_compatable(inFile, tsn = ''):
 280     supportedModes = [[720, 480], [704, 480], [544, 480], [480, 480], [352, 480]]
 281     type, width, height, fps, millisecs, kbps, akbps, acodec, afreq =  video_info(inFile)
 282     #print type, width, height, fps, millisecs, kbps, akbps, acodec
 283
 284     if (inFile[-5:]).lower() == '.tivo':
 285         debug_write(__name__, fn_attr(), ['TRUE, ends with .tivo.', inFile])
 286         return True
 287
 288     if not type == 'mpeg2video':
 289         #print 'Not Tivo Codec'
 290         debug_write(__name__, fn_attr(), ['FALSE, type', type, 'not mpeg2video.', inFile])
 291         return False
 292
 293     if (inFile[-3:]).lower() == '.ts':
 294         debug_write(__name__, fn_attr(), ['FALSE, transport stream not supported.', inFile])
 295         return False
 296
 297     if acodec == 'dca':
 298         debug_write(__name__, fn_attr(), ['FALSE, acodec', acodec, ', not supported.', inFile])
 299         return False
 300
 301     if not akbps or int(akbps) > config.getMaxAudioBR(tsn):
 302         debug_write(__name__, fn_attr(), ['FALSE,', akbps, 'kbps exceeds max audio bitrate.', inFile])
 303         return False
 304
 305     if not kbps or int(kbps)-int(akbps) > config.strtod(config.getMaxVideoBR())/1000:
 306         debug_write(__name__, fn_attr(), ['FALSE,', kbps, 'kbps exceeds max video bitrate.', inFile])
 307         return False
 308
 309     if config.isHDtivo(tsn):
 310         debug_write(__name__, fn_attr(), ['TRUE, HD Tivo detected, skipping remaining tests', inFile])
 311         return True
 312
 313     if not fps == '29.97':
 314         #print 'Not Tivo fps'
 315         debug_write(__name__, fn_attr(), ['FALSE,', fps, 'fps, should be 29.97.', inFile])
 316         return False
 317
 318     for mode in supportedModes:
 319         if (mode[0], mode[1]) == (width, height):
 320             #print 'Is TiVo!'
 321             debug_write(__name__, fn_attr(), ['TRUE,', width, 'x', height, 'is valid.', inFile])
 322             return True
 323     #print 'Not Tivo dimensions'
 324     debug_write(__name__, fn_attr(), ['FALSE,', width, 'x', height, 'not in supported modes.', inFile])
 325     return False
 326
 327 def video_info(inFile):
 328     mtime = os.stat(inFile).st_mtime
 329     if inFile != videotest:
 330         if inFile in info_cache and info_cache[inFile][0] == mtime:
 331             debug_write(__name__, fn_attr(), ['CACHE HIT!', inFile])
 332             return info_cache[inFile][1]
 333
 334     if (inFile[-5:]).lower() == '.tivo':
 335         info_cache[inFile] = (mtime, (True, True, True, True, True, True, True, True, True))
 336         debug_write(__name__, fn_attr(), ['VALID, ends in .tivo.', inFile])
 337         return True, True, True, True, True, True, True, True, True
 338
 339     cmd = [ffmpeg_path(), '-i', inFile ]
 340     ffmpeg = subprocess.Popen(cmd, stderr=subprocess.PIPE, stdout=subprocess.PIPE, stdin=subprocess.PIPE)
 341
 342     # wait 10 sec if ffmpeg is not back give up
 343     for i in xrange(200):
 344         time.sleep(.05)
 345         if not ffmpeg.poll() == None:
 346             break
 347
 348     if ffmpeg.poll() == None:
 349         kill(ffmpeg.pid)
 350         info_cache[inFile] = (mtime, (None, None, None, None, None, None, None, None, None))
 351         return None, None, None, None, None, None, None, None, None
 352
 353     output = ffmpeg.stderr.read()
 354     debug_write(__name__, fn_attr(), ['ffmpeg output=', output])
 355
 356     rezre = re.compile(r'.*Video: ([^,]+),.*')
 357     x = rezre.search(output)
 358     if x:
 359         codec = x.group(1)
 360     else:
 361         info_cache[inFile] = (mtime, (None, None, None, None, None, None, None, None, None))
 362         debug_write(__name__, fn_attr(), ['failed at video codec'])
 363         return None, None, None, None, None, None, None, None, None
 364
 365     rezre = re.compile(r'.*Video: .+, (\d+)x(\d+)[, ].*')
 366     x = rezre.search(output)
 367     if x:
 368         width = int(x.group(1))
 369         height = int(x.group(2))
 370     else:
 371         info_cache[inFile] = (mtime, (None, None, None, None, None, None, None, None, None))
 372         debug_write(__name__, fn_attr(), ['failed at width/height'])
 373         return None, None, None, None, None, None, None, None, None
 374
 375     rezre = re.compile(r'.*Video: .+, (.+) (?:fps|tb).*')
 376     x = rezre.search(output)
 377     if x:
 378         fps = x.group(1)
 379     else:
 380         info_cache[inFile] = (mtime, (None, None, None, None, None, None, None, None, None))
 381         debug_write(__name__, fn_attr(), ['failed at fps'])
 382         return None, None, None, None, None, None, None, None, None
 383
 384     # Allow override only if it is mpeg2 and frame rate was doubled to 59.94
 385     if (not fps == '29.97') and (codec == 'mpeg2video'):
 386         # First look for the build 7215 version
 387         rezre = re.compile(r'.*film source: 29.97.*')
 388         x = rezre.search(output.lower() )
 389         if x:
 390             debug_write(__name__, fn_attr(), ['film source: 29.97 setting fps to 29.97'])
 391             fps = '29.97'
 392         else:
 393             # for build 8047:
 394             rezre = re.compile(r'.*frame rate differs from container frame rate: 29.97.*')
 395             debug_write(__name__, fn_attr(), ['Bug in VideoReDo'])
 396             x = rezre.search(output.lower() )
 397             if x:
 398                 fps = '29.97'
 399
 400     durre = re.compile(r'.*Duration: (.{2}):(.{2}):(.{2})\.(.),')
 401     d = durre.search(output)
 402     if d:
 403         millisecs = ((int(d.group(1))*3600) + (int(d.group(2))*60) + int(d.group(3)))*1000 + (int(d.group(4))*100)
 404     else:
 405         millisecs = 0
 406
 407     #get bitrate of source for tivo compatibility test.
 408     rezre = re.compile(r'.*bitrate: (.+) (?:kb/s).*')
 409     x = rezre.search(output)
 410     if x:
 411         kbps = x.group(1)
 412     else:
 413         kbps = None
 414         debug_write(__name__, fn_attr(), ['failed at kbps'])
 415
 416     #get audio bitrate of source for tivo compatibility test.
 417     rezre = re.compile(r'.*Audio: .+, (.+) (?:kb/s).*')
 418     x = rezre.search(output)
 419     if x:
 420         akbps = x.group(1)
 421     else:
 422         akbps = None
 423         debug_write(__name__, fn_attr(), ['failed at akbps'])
 424
 425     #get audio codec of source for tivo compatibility test.
 426     rezre = re.compile(r'.*Audio: ([^,]+),.*')
 427     x = rezre.search(output)
 428     if x:
 429         acodec = x.group(1)
 430     else:
 431         acodec = None
 432         debug_write(__name__, fn_attr(), ['failed at acodec'])
 433
 434     #get audio frequency of source for tivo compatibility test.
 435     rezre = re.compile(r'.*Audio: .+, (.+) (?:Hz).*')
 436     x = rezre.search(output)
 437     if x:
 438         afreq = x.group(1)
 439     else:
 440         afreq = None
 441         debug_write(__name__, fn_attr(), ['failed at afreq'])
 442
 443     info_cache[inFile] = (mtime, (codec, width, height, fps, millisecs, kbps, akbps, acodec, afreq))
 444     debug_write(__name__, fn_attr(), ['Codec=', codec, ' width=', width, ' height=', height, ' fps=', fps, ' millisecs=', millisecs, ' kbps=', kbps, ' akbps=', akbps, ' acodec=', acodec, ' afreq=', afreq])
 445     return codec, width, height, fps, millisecs, kbps, akbps, acodec, afreq
 446
 447 def video_check(inFile, cmd_string):
 448     cmd = [ffmpeg_path(), '-i', inFile] + cmd_string.split()
 449     ffmpeg = subprocess.Popen(cmd, stdout=subprocess.PIPE)
 450     try:
 451         shutil.copyfileobj(ffmpeg.stdout, open(videotest, 'wb'))
 452         return True
 453     except:
 454         kill(ffmpeg.pid)
 455         return False
 456
 457 def supported_format(inFile):
 458     if video_info(inFile)[0]:
 459         return True
 460     else:
 461         debug_write(__name__, fn_attr(), ['FALSE, file not supported', inFile])
 462         return False
 463
 464 def kill(pid):
 465     debug_write(__name__, fn_attr(), ['killing pid=', str(pid)])
 466     if mswindows:
 467         win32kill(pid)
 468     else:
 469         import os, signal
 470         os.kill(pid, signal.SIGTERM)
 471
 472 def win32kill(pid):
 473         import ctypes
 474         handle = ctypes.windll.kernel32.OpenProcess(1, False, pid)
 475         ctypes.windll.kernel32.TerminateProcess(handle, -1)
 476         ctypes.windll.kernel32.CloseHandle(handle)
 477
 478 def gcd(a,b):
 479     while b:
 480         a, b = b, a % b
 481     return a
 482