plugins/video/transcode.py

   1 import logging
   2 import math
   3 import os
   4 import re
   5 import shutil
   6 import subprocess
   7 import sys
   8 import tempfile
   9 import time
  10
  11 import lrucache
  12 import config
  13 from plugin import GetPlugin
  14
  15 logger = logging.getLogger('pyTivo.video.transcode')
  16
  17 info_cache = lrucache.LRUCache(1000)
  18 videotest = os.path.join(os.path.dirname(__file__), 'videotest.mpg')
  19
  20 BAD_MPEG_FPS = ['15.00']
  21
  22 def ffmpeg_path():
  23     return config.get('Server', 'ffmpeg')
  24
  25 # XXX BIG HACK
  26 # subprocess is broken for me on windows so super hack
  27 def patchSubprocess():
  28     o = subprocess.Popen._make_inheritable
  29
  30     def _make_inheritable(self, handle):
  31         if not handle: return subprocess.GetCurrentProcess()
  32         return o(self, handle)
  33
  34     subprocess.Popen._make_inheritable = _make_inheritable
  35 mswindows = (sys.platform == "win32")
  36 if mswindows:
  37     patchSubprocess()
  38
  39 def output_video(inFile, outFile, tsn=''):
  40     if tivo_compatible(inFile, tsn)[0]:
  41         logger.debug('%s is tivo compatible' % inFile)
  42         f = file(inFile, 'rb')
  43         shutil.copyfileobj(f, outFile)
  44         f.close()
  45     else:
  46         logger.debug('%s is not tivo compatible' % inFile)
  47         transcode(False, inFile, outFile, tsn)
  48
  49 def transcode(isQuery, inFile, outFile, tsn=''):
  50     settings = {'video_codec': select_videocodec(tsn),
  51                 'video_br': select_videobr(inFile, tsn),
  52                 'video_fps': select_videofps(inFile, tsn),
  53                 'max_video_br': select_maxvideobr(),
  54                 'buff_size': select_buffsize(tsn),
  55                 'aspect_ratio': ' '.join(select_aspect(inFile, tsn)),
  56                 'audio_br': select_audiobr(tsn),
  57                 'audio_fr': select_audiofr(inFile, tsn),
  58                 'audio_ch': select_audioch(tsn),
  59                 'audio_codec': select_audiocodec(isQuery, inFile, tsn),
  60                 'audio_lang': select_audiolang(inFile, tsn),
  61                 'ffmpeg_pram': select_ffmpegprams(tsn),
  62                 'format': select_format(tsn)}
  63
  64     if isQuery:
  65         return settings
  66
  67     cmd_string = config.getFFmpegTemplate(tsn) % settings
  68
  69     cmd = [ffmpeg_path(), '-i', inFile] + cmd_string.split()
  70     logging.debug('transcoding to tivo model ' + tsn[:3] +
  71                   ' using ffmpeg command:')
  72     logging.debug(' '.join(cmd))
  73     ffmpeg = subprocess.Popen(cmd, bufsize=(512 * 1024),
  74                               stdout=subprocess.PIPE)
  75     try:
  76         shutil.copyfileobj(ffmpeg.stdout, outFile)
  77     except:
  78         kill(ffmpeg.pid)
  79
  80 def select_audiocodec(isQuery, inFile, tsn=''):
  81     # Default, compatible with all TiVo's
  82     codec = 'ac3'
  83     vInfo = video_info(inFile)
  84     codectype = vInfo['vCodec']
  85     codec = config.getAudioCodec(tsn)
  86     if not codec:
  87         if vInfo['aCodec'] in ('ac3', 'liba52', 'mp2'):
  88             if vInfo['aKbps'] == None:
  89                 if not isQuery:
  90                     cmd_string = ('-y -vcodec mpeg2video -r 29.97 ' +
  91                                   '-b 1000k -acodec copy ' +
  92                                   select_audiolang(inFile, tsn) +
  93                                   ' -t 00:00:01 -f vob -')
  94                     if video_check(inFile, cmd_string):
  95                         vInfo = video_info(videotest)
  96                 else:
  97                     codec = 'TBD'
  98             if (not vInfo['aKbps'] == None and
  99                 int(vInfo['aKbps']) <= config.getMaxAudioBR(tsn)):
 100                 # compatible codec and bitrate, do not reencode audio
 101                 codec = 'copy'
 102     copy_flag = config.getCopyTS(tsn)
 103     copyts = ' -copyts'
 104     if (codec == 'copy' and codectype == 'mpeg2video' and not copy_flag) or
 105        (copy_flag and copy_flag.lower() == 'false'):
 106         copyts = ''
 107     return '-acodec ' + codec + copyts
 108
 109 def select_audiofr(inFile, tsn):
 110     freq = '48000'  #default
 111     vInfo = video_info(inFile)
 112     if not vInfo['aFreq'] == None and vInfo['aFreq'] in ('44100', '48000'):
 113         # compatible frequency
 114         freq = vInfo['aFreq']
 115     if config.getAudioFR(tsn) != None:
 116         freq = config.getAudioFR(tsn)
 117     return '-ar ' + freq
 118
 119 def select_audioch(tsn):
 120     ch = config.getAudioCH(tsn)
 121     if ch:
 122         return '-ac ' + ch
 123     return ''
 124
 125 def select_audiolang(inFile, tsn):
 126     vInfo =  video_info(inFile)
 127     if config.getAudioLang(tsn) != None and vInfo['mapVideo'] != None:
 128         stream = vInfo['mapAudio'][0][0]
 129         langmatch = []
 130         for lang in config.getAudioLang(tsn).replace(' ','').lower().split(','):
 131             for s, l in vInfo['mapAudio']:
 132                 if lang in s + l.replace(' ','').lower():
 133                     langmatch.append(s)
 134                     stream = s
 135                     break
 136             if langmatch: break
 137         if stream is not '':
 138             return '-map ' + vInfo['mapVideo'] + ' -map ' + stream
 139     return ''
 140
 141 def select_videofps(inFile, tsn):
 142     vInfo =  video_info(inFile)
 143     fps = '-r 29.97'  # default
 144     if config.isHDtivo(tsn) and vInfo['vFps'] not in BAD_MPEG_FPS:
 145         fps = ' '
 146     if config.getVideoFPS(tsn) != None:
 147         fps = '-r ' + config.getVideoFPS(tsn)
 148     return fps
 149
 150 def select_videocodec(tsn):
 151     codec = config.getVideoCodec(tsn)
 152     if not codec:
 153         codec = 'mpeg2video'  # default
 154     return '-vcodec ' + codec
 155
 156 def select_videobr(inFile, tsn):
 157     return '-b ' + str(select_videostr(inFile, tsn) / 1000) + 'k'
 158
 159 def select_videostr(inFile, tsn):
 160     video_str = config.strtod(config.getVideoBR(tsn))
 161     if config.isHDtivo(tsn):
 162         vInfo =  video_info(inFile)
 163         if vInfo['kbps'] != None and config.getVideoPCT() > 0:
 164             video_percent = int(vInfo['kbps']) * 10 * config.getVideoPCT()
 165             video_str = max(video_str, video_percent)
 166     video_str = int(min(config.strtod(config.getMaxVideoBR()) * 0.95,
 167                         video_str))
 168     return video_str
 169
 170 def select_audiobr(tsn):
 171     return '-ab ' + config.getAudioBR(tsn)
 172
 173 def select_maxvideobr():
 174     return '-maxrate ' + config.getMaxVideoBR()
 175
 176 def select_buffsize(tsn):
 177     return '-bufsize ' + config.getBuffSize(tsn)
 178
 179 def select_ffmpegprams(tsn):
 180     params = config.getFFmpegPrams(tsn)
 181     if not params:
 182         params = ''
 183     return params
 184
 185 def select_format(tsn):
 186     fmt = config.getFormat(tsn)
 187     if not fmt:
 188         fmt = 'vob'
 189     return '-f %s -' % fmt
 190
 191 def select_aspect(inFile, tsn = ''):
 192     TIVO_WIDTH = config.getTivoWidth(tsn)
 193     TIVO_HEIGHT = config.getTivoHeight(tsn)
 194
 195     vInfo =  video_info(inFile)
 196
 197     logging.debug('tsn: %s' % tsn)
 198
 199     aspect169 = config.get169Setting(tsn)
 200
 201     logging.debug('aspect169: %s' % aspect169)
 202
 203     optres = config.getOptres(tsn)
 204
 205     logging.debug('optres: %s' % optres)
 206
 207     if optres:
 208         optHeight = config.nearestTivoHeight(vInfo['vHeight'])
 209         optWidth = config.nearestTivoWidth(vInfo['vWidth'])
 210         if optHeight < TIVO_HEIGHT:
 211             TIVO_HEIGHT = optHeight
 212         if optWidth < TIVO_WIDTH:
 213             TIVO_WIDTH = optWidth
 214
 215     d = gcd(vInfo['vHeight'], vInfo['vWidth'])
 216     ratio = vInfo['vWidth'] * 100 / vInfo['vHeight']
 217     rheight, rwidth = vInfo['vHeight'] / d, vInfo['vWidth'] / d
 218
 219     logger.debug(('File=%s vCodec=%s vWidth=%s vHeight=%s vFps=%s ' +
 220                   'millisecs=%s ratio=%s rheight=%s rwidth=%s ' +
 221                   'TIVO_HEIGHT=%s TIVO_WIDTH=%s') % (inFile,
 222                   vInfo['vCodec'], vInfo['vWidth'], vInfo['vHeight'],
 223                   vInfo['vFps'], vInfo['millisecs'], ratio, rheight,
 224                   rwidth, TIVO_HEIGHT, TIVO_WIDTH))
 225
 226     multiplier16by9 = (16.0 * TIVO_HEIGHT) / (9.0 * TIVO_WIDTH)
 227     multiplier4by3  =  (4.0 * TIVO_HEIGHT) / (3.0 * TIVO_WIDTH)
 228
 229     if config.isHDtivo(tsn) and not optres:
 230         if config.getPixelAR(0):
 231             if vInfo['par2'] == None:
 232                 npar = config.getPixelAR(1)
 233             else:
 234                 npar = vInfo['par2']
 235
 236             # adjust for pixel aspect ratio, if set, because TiVo
 237             # expects square pixels
 238
 239             if npar < 1.0:
 240                 return ['-s', str(vInfo['vWidth']) + 'x' +
 241                         str(int(math.ceil(vInfo['vHeight'] / npar)))]
 242             elif npar > 1.0:
 243                 # FFMPEG expects width to be a multiple of two
 244
 245                 return ['-s', str(int(math.ceil(vInfo['vWidth'] * npar /
 246                         2.0) * 2)) + 'x' + str(vInfo['vHeight'])]
 247
 248         if vInfo['vHeight'] <= TIVO_HEIGHT:
 249             # pass all resolutions to S3, except heights greater than
 250             # conf height
 251             return []
 252         # else, resize video.
 253
 254     if (rwidth, rheight) in [(1, 1)] and vInfo['par1'] == '8:9':
 255         logger.debug('File + PAR is within 4:3.')
 256         return ['-aspect', '4:3', '-s', '%sx%s' % (TIVO_WIDTH, TIVO_HEIGHT)]
 257
 258     elif ((rwidth, rheight) in [(4, 3), (10, 11), (15, 11), (59, 54),
 259                                 (59, 72), (59, 36), (59, 54)] or
 260           vInfo['dar1'] == '4:3'):
 261         logger.debug('File is within 4:3 list.')
 262         return ['-aspect', '4:3', '-s', '%sx%s' % (TIVO_WIDTH, TIVO_HEIGHT)]
 263
 264     elif (((rwidth, rheight) in [(16, 9), (20, 11), (40, 33), (118, 81),
 265                                 (59, 27)] or vInfo['dar1'] == '16:9')
 266           and (aspect169 or config.get169Letterbox(tsn))):
 267         logger.debug('File is within 16:9 list and 16:9 allowed.')
 268
 269         if config.get169Blacklist(tsn) or (aspect169 and
 270                                            config.get169Letterbox(tsn)):
 271             return ['-aspect', '4:3', '-s', '%sx%s' %
 272                     (TIVO_WIDTH, TIVO_HEIGHT)]
 273         else:
 274             return ['-aspect', '16:9', '-s', '%sx%s' %
 275                     (TIVO_WIDTH, TIVO_HEIGHT)]
 276     else:
 277         settings = []
 278
 279         # If video is wider than 4:3 add top and bottom padding
 280
 281         if ratio > 133: # Might be 16:9 file, or just need padding on
 282                         # top and bottom
 283
 284             if aspect169 and ratio > 135: # If file would fall in 4:3
 285                                           # assume it is supposed to be 4:3
 286
 287                 if ratio > 177: # too short needs padding top and bottom
 288                     endHeight = int(((TIVO_WIDTH * vInfo['vHeight']) /
 289                                     vInfo['vWidth']) * multiplier16by9)
 290                     settings.append('-aspect')
 291                     if (config.get169Blacklist(tsn) or
 292                         config.get169Letterbox(tsn)):
 293                         settings.append('4:3')
 294                     else:
 295                         settings.append('16:9')
 296                     if endHeight % 2:
 297                         endHeight -= 1
 298                     if endHeight < TIVO_HEIGHT * 0.99:
 299                         topPadding = (TIVO_HEIGHT - endHeight) / 2
 300                         if topPadding % 2:
 301                             topPadding -= 1
 302                         bottomPadding = (TIVO_HEIGHT - endHeight) - topPadding
 303                         settings += ['-s', '%sx%s' % (TIVO_WIDTH, endHeight),
 304                                      '-padtop', str(topPadding),
 305                                      '-padbottom', str(bottomPadding)]
 306                     else:   # if only very small amount of padding
 307                             # needed, then just stretch it
 308                         settings += ['-s', '%sx%s' % (TIVO_WIDTH, TIVO_HEIGHT)]
 309
 310                     logger.debug(('16:9 aspect allowed, file is wider ' +
 311                                   'than 16:9 padding top and bottom\n%s') %
 312                                  ' '.join(settings))
 313
 314                 else: # too skinny needs padding on left and right.
 315                     endWidth = int((TIVO_HEIGHT * vInfo['vWidth']) /
 316                                    (vInfo['vHeight'] * multiplier16by9))
 317                     settings.append('-aspect')
 318                     if (config.get169Blacklist(tsn) or
 319                         config.get169Letterbox(tsn)):
 320                         settings.append('4:3')
 321                     else:
 322                         settings.append('16:9')
 323                     if endWidth % 2:
 324                         endWidth -= 1
 325                     if endWidth < (TIVO_WIDTH - 10):
 326                         leftPadding = (TIVO_WIDTH - endWidth) / 2
 327                         if leftPadding % 2:
 328                             leftPadding -= 1
 329                         rightPadding = (TIVO_WIDTH - endWidth) - leftPadding
 330                         settings += ['-s', '%sx%s' % (endWidth, TIVO_HEIGHT),
 331                                      '-padleft', str(leftPadding),
 332                                      '-padright', str(rightPadding)]
 333                     else: # if only very small amount of padding needed,
 334                           # then just stretch it
 335                         settings += ['-s', '%sx%s' % (TIVO_WIDTH, TIVO_HEIGHT)]
 336                     logger.debug(('16:9 aspect allowed, file is narrower ' +
 337                                   'than 16:9 padding left and right\n%s') %
 338                                  ' '.join(settings))
 339             else: # this is a 4:3 file or 16:9 output not allowed
 340                 multiplier = multiplier4by3
 341                 settings.append('-aspect')
 342                 if ratio > 135 and config.get169Letterbox(tsn):
 343                     settings.append('16:9')
 344                     multiplier = multiplier16by9
 345                 else:
 346                     settings.append('4:3')
 347                 endHeight = int(((TIVO_WIDTH * vInfo['vHeight']) /
 348                                  vInfo['vWidth']) * multiplier)
 349                 if endHeight % 2:
 350                     endHeight -= 1
 351                 if endHeight < TIVO_HEIGHT * 0.99:
 352                     topPadding = (TIVO_HEIGHT - endHeight) / 2
 353                     if topPadding % 2:
 354                         topPadding -= 1
 355                     bottomPadding = (TIVO_HEIGHT - endHeight) - topPadding
 356                     settings += ['-s', '%sx%s' % (TIVO_WIDTH, endHeight),
 357                                  '-padtop', str(topPadding),
 358                                  '-padbottom', str(bottomPadding)]
 359                 else:   # if only very small amount of padding needed,
 360                         # then just stretch it
 361                     settings += ['-s', '%sx%s' % (TIVO_WIDTH, TIVO_HEIGHT)]
 362                 logging.debug(('File is wider than 4:3 padding ' +
 363                                'top and bottom\n%s') % ' '.join(settings))
 364
 365             return settings
 366
 367         # If video is taller than 4:3 add left and right padding, this
 368         # is rare. All of these files will always be sent in an aspect
 369         # ratio of 4:3 since they are so narrow.
 370
 371         else:
 372             endWidth = int((TIVO_HEIGHT * vInfo['vWidth']) /
 373                            (vInfo['vHeight'] * multiplier4by3))
 374             settings += ['-aspect', '4:3']
 375             if endWidth % 2:
 376                 endWidth -= 1
 377             if endWidth < (TIVO_WIDTH * 0.99):
 378                 leftPadding = (TIVO_WIDTH - endWidth) / 2
 379                 if leftPadding % 2:
 380                     leftPadding -= 1
 381                 rightPadding = (TIVO_WIDTH - endWidth) - leftPadding
 382                 settings += ['-s', '%sx%s' % (endWidth, TIVO_HEIGHT),
 383                              '-padleft', str(leftPadding),
 384                              '-padright', str(rightPadding)]
 385             else: # if only very small amount of padding needed, then
 386                   # just stretch it
 387                 settings += ['-s', '%sx%s' % (TIVO_WIDTH, TIVO_HEIGHT)]
 388
 389             logger.debug('File is taller than 4:3 padding left and right\n%s'
 390                          % ' '.join(settings))
 391
 392             return settings
 393
 394 def tivo_compatible(inFile, tsn=''):
 395     supportedModes = [(720, 480), (704, 480), (544, 480),
 396                       (528, 480), (480, 480), (352, 480)]
 397     vInfo = video_info(inFile)
 398
 399     while True:
 400         if (inFile[-5:]).lower() == '.tivo':
 401             message = (True, 'TRANSCODE=NO, ends with .tivo.')
 402             break
 403
 404         if not vInfo['vCodec'] == 'mpeg2video':
 405             #print 'Not Tivo Codec'
 406             message = (False, 'TRANSCODE=YES, vCodec %s not compatible.' %
 407                               vInfo['vCodec'])
 408             break
 409
 410         if os.path.splitext(inFile)[-1].lower() in ('.ts', '.mpv',
 411                                                     '.tp', '.dvr-ms'):
 412             message = (False, 'TRANSCODE=YES, ext %s not compatible.' %
 413                               os.path.splitext(inFile)[-1])
 414             break
 415
 416         if vInfo['aCodec'] == 'dca':
 417             message = (False, 'TRANSCODE=YES, aCodec %s not compatible.' %
 418                               vInfo['aCodec'])
 419             break
 420
 421         if vInfo['aCodec'] != None:
 422             if (not vInfo['aKbps'] or
 423                 int(vInfo['aKbps']) > config.getMaxAudioBR(tsn)):
 424                 message = (False, ('TRANSCODE=YES, %s kbps exceeds max ' +
 425                                    'audio bitrate.') % vInfo['aKbps'])
 426                 break
 427
 428         if vInfo['kbps'] != None:
 429             abit = max('0', vInfo['aKbps'])
 430             if (int(vInfo['kbps']) - int(abit) >
 431                 config.strtod(config.getMaxVideoBR()) / 1000):
 432                 message = (False, ('TRANSCODE=YES, %s kbps exceeds max ' +
 433                                    'video bitrate.') % vInfo['kbps'])
 434                 break
 435         else:
 436             message = (False, 'TRANSCODE=YES, %s kbps not supported.' %
 437                               vInfo['kbps'])
 438             break
 439
 440         if config.getAudioLang(tsn):
 441             if vInfo['mapAudio'][0][0] != select_audiolang(inFile, tsn)[-3:]:
 442                 message = (False, ('TRANSCODE=YES, %s preferred audio ' +
 443                                    'track exists.') % config.getAudioLang(tsn))
 444                 break
 445
 446         if config.isHDtivo(tsn):
 447             if vInfo['par2'] != 1.0:
 448                 if config.getPixelAR(0):
 449                     if vInfo['par2'] != None or config.getPixelAR(1) != 1.0:
 450                         message = (False, 'TRANSCODE=YES, %s not correct PAR.'
 451                                           % vInfo['par2'])
 452                         break
 453             message = (True, 'TRANSCODE=NO, HD Tivo detected, skipping ' +
 454                              'remaining tests.')
 455             break
 456
 457         if not vInfo['vFps'] == '29.97':
 458             #print 'Not Tivo fps'
 459             message = (False, 'TRANSCODE=YES, %s vFps, should be 29.97.' %
 460                               vInfo['vFps'])
 461             break
 462
 463         if ((config.get169Blacklist(tsn) and not config.get169Setting(tsn))
 464             or (config.get169Letterbox(tsn) and config.get169Setting(tsn))):
 465             if vInfo['dar1'] == None or not vInfo['dar1'] in ('4:3', '8:9'):
 466                 message = (False, ('TRANSCODE=YES, DAR %s not supported ' +
 467                                    'by BLACKLIST_169 tivos.') % vInfo['dar1'])
 468                 break
 469
 470         for mode in supportedModes:
 471             if mode == (vInfo['vWidth'], vInfo['vHeight']):
 472                 message = (True, 'TRANSCODE=NO, %s x %s is valid.' %
 473                                  (vInfo['vWidth'], vInfo['vHeight']))
 474                 break
 475             #print 'Not Tivo dimensions'
 476             message = (False, 'TRANSCODE=YES, %s x %s not in supported modes.'
 477                        % (vInfo['vWidth'], vInfo['vHeight']))
 478         break
 479
 480     logger.debug('%s, %s' % (message, inFile))
 481     return message
 482
 483
 484 def video_info(inFile):
 485     vInfo = dict()
 486     mtime = os.stat(inFile).st_mtime
 487     if inFile != videotest:
 488         if inFile in info_cache and info_cache[inFile][0] == mtime:
 489             logging.debug('CACHE HIT! %s' % inFile)
 490             return info_cache[inFile][1]
 491
 492     vInfo['Supported'] = True
 493
 494     if (inFile[-5:]).lower() == '.tivo':
 495         vInfo['millisecs'] = 0
 496         info_cache[inFile] = (mtime, vInfo)
 497         logger.debug('VALID, ends in .tivo. %s' % inFile)
 498         return vInfo
 499
 500     cmd = [ffmpeg_path(), '-i', inFile]
 501     # Windows and other OS buffer 4096 and ffmpeg can output more than that.
 502     err_tmp = tempfile.TemporaryFile()
 503     ffmpeg = subprocess.Popen(cmd, stderr=err_tmp, stdout=subprocess.PIPE,
 504                               stdin=subprocess.PIPE)
 505
 506     # wait 10 sec if ffmpeg is not back give up
 507     for i in xrange(200):
 508         time.sleep(.05)
 509         if not ffmpeg.poll() == None:
 510             break
 511
 512     if ffmpeg.poll() == None:
 513         kill(ffmpeg.pid)
 514         vInfo['Supported'] = False
 515         info_cache[inFile] = (mtime, vInfo)
 516         return vInfo
 517
 518     err_tmp.seek(0)
 519     output = err_tmp.read()
 520     err_tmp.close()
 521     logging.debug('ffmpeg output=%s' % output)
 522
 523     rezre = re.compile(r'.*Video: ([^,]+),.*')
 524     x = rezre.search(output)
 525     if x:
 526         vInfo['vCodec'] = x.group(1)
 527     else:
 528         vInfo['vCodec'] = ''
 529         vInfo['Supported'] = False
 530         logger.debug('failed at vCodec')
 531
 532     rezre = re.compile(r'.*Video: .+, (\d+)x(\d+)[, ].*')
 533     x = rezre.search(output)
 534     if x:
 535         vInfo['vWidth'] = int(x.group(1))
 536         vInfo['vHeight'] = int(x.group(2))
 537     else:
 538         vInfo['vWidth'] = ''
 539         vInfo['vHeight'] = ''
 540         vInfo['Supported'] = False
 541         logger.debug('failed at vWidth/vHeight')
 542
 543     rezre = re.compile(r'.*Video: .+, (.+) (?:fps|tb).*')
 544     x = rezre.search(output)
 545     if x:
 546         vInfo['vFps'] = x.group(1)
 547
 548         # Allow override only if it is mpeg2 and frame rate was doubled
 549         # to 59.94
 550
 551         if vInfo['vCodec'] == 'mpeg2video' and vInfo['vFps'] != '29.97':
 552             # First look for the build 7215 version
 553             rezre = re.compile(r'.*film source: 29.97.*')
 554             x = rezre.search(output.lower())
 555             if x:
 556                 logger.debug('film source: 29.97 setting vFps to 29.97')
 557                 vInfo['vFps'] = '29.97'
 558             else:
 559                 # for build 8047:
 560                 rezre = re.compile(r'.*frame rate differs from container ' +
 561                                    r'frame rate: 29.97.*')
 562                 logger.debug('Bug in VideoReDo')
 563                 x = rezre.search(output.lower())
 564                 if x:
 565                     vInfo['vFps'] = '29.97'
 566     else:
 567         vInfo['vFps'] = ''
 568         vInfo['Supported'] = False
 569         logger.debug('failed at vFps')
 570
 571     durre = re.compile(r'.*Duration: ([0-9]+):([0-9]+):([0-9]+)\.([0-9]+),')
 572     d = durre.search(output)
 573
 574     if d:
 575         vInfo['millisecs'] = ((int(d.group(1)) * 3600 +
 576                                int(d.group(2)) * 60 +
 577                                int(d.group(3))) * 1000 +
 578                               int(d.group(4)) * (10 ** (3 - len(d.group(4)))))
 579     else:
 580         vInfo['millisecs'] = 0
 581
 582     # get bitrate of source for tivo compatibility test.
 583     rezre = re.compile(r'.*bitrate: (.+) (?:kb/s).*')
 584     x = rezre.search(output)
 585     if x:
 586         vInfo['kbps'] = x.group(1)
 587     else:
 588         vInfo['kbps'] = None
 589         logger.debug('failed at kbps')
 590
 591     # get audio bitrate of source for tivo compatibility test.
 592     rezre = re.compile(r'.*Audio: .+, (.+) (?:kb/s).*')
 593     x = rezre.search(output)
 594     if x:
 595         vInfo['aKbps'] = x.group(1)
 596     else:
 597         vInfo['aKbps'] = None
 598         logger.debug('failed at aKbps')
 599
 600     # get audio codec of source for tivo compatibility test.
 601     rezre = re.compile(r'.*Audio: ([^,]+),.*')
 602     x = rezre.search(output)
 603     if x:
 604         vInfo['aCodec'] = x.group(1)
 605     else:
 606         vInfo['aCodec'] = None
 607         logger.debug('failed at aCodec')
 608
 609     # get audio frequency of source for tivo compatibility test.
 610     rezre = re.compile(r'.*Audio: .+, (.+) (?:Hz).*')
 611     x = rezre.search(output)
 612     if x:
 613         vInfo['aFreq'] = x.group(1)
 614     else:
 615         vInfo['aFreq'] = None
 616         logger.debug('failed at aFreq')
 617
 618     # get par.
 619     rezre = re.compile(r'.*Video: .+PAR ([0-9]+):([0-9]+) DAR [0-9:]+.*')
 620     x = rezre.search(output)
 621     if x and x.group(1) != "0" and x.group(2) != "0":
 622         vInfo['par1'] = x.group(1) + ':' + x.group(2)
 623         vInfo['par2'] = float(x.group(1)) / float(x.group(2))
 624     else:
 625         vInfo['par1'], vInfo['par2'] = None, None
 626
 627     # get dar.
 628     rezre = re.compile(r'.*Video: .+DAR ([0-9]+):([0-9]+).*')
 629     x = rezre.search(output)
 630     if x and x.group(1) != "0" and x.group(2) != "0":
 631         vInfo['dar1'] = x.group(1) + ':' + x.group(2)
 632         vInfo['dar2'] = float(x.group(1)) / float(x.group(2))
 633     else:
 634         vInfo['dar1'], vInfo['dar2'] = None, None
 635
 636     # get Video Stream mapping.
 637     rezre = re.compile(r'([0-9]+\.[0-9]+).*: Video:.*')
 638     x = rezre.search(output)
 639     if x:
 640         vInfo['mapVideo'] = x.group(1)
 641     else:
 642         vInfo['mapVideo'] = None
 643         logger.debug('failed at mapVideo')
 644
 645     # get Audio Stream mapping.
 646     rezre = re.compile(r'([0-9]+\.[0-9]+)(.*): Audio:.*')
 647     x = rezre.search(output)
 648     amap = []
 649     if x:
 650         for x in rezre.finditer(output):
 651             amap.append(x.groups())
 652     else:
 653         amap.append(('', ''))
 654         logger.debug('failed at mapAudio')
 655     vInfo['mapAudio'] = amap
 656
 657     videoPlugin = GetPlugin('video')
 658     metadata = videoPlugin.getMetadataFromTxt(inFile)
 659
 660     for key in metadata:
 661         if key.startswith('Override_'):
 662             vInfo['Supported'] = True
 663             if key.startswith('Override_mapAudio'):
 664                 audiomap = dict(vInfo['mapAudio'])
 665                 stream = key.replace('Override_mapAudio', '').strip()
 666                 if stream in audiomap:
 667                     newaudiomap = (stream, metadata[key])
 668                     audiomap.update([newaudiomap])
 669                     vInfo['mapAudio'] = sorted(audiomap.items(),
 670                                                key=lambda (k,v): (k,v))
 671             elif key.startswith('Override_millisecs'):
 672                 vInfo[key.replace('Override_', '')] = int(metadata[key])
 673             else:
 674                 vInfo[key.replace('Override_', '')] = metadata[key]
 675
 676     info_cache[inFile] = (mtime, vInfo)
 677     logger.debug("; ".join(["%s=%s" % (k, v) for k, v in vInfo.items()]))
 678     return vInfo
 679
 680 def video_check(inFile, cmd_string):
 681     cmd = [ffmpeg_path(), '-i', inFile] + cmd_string.split()
 682     ffmpeg = subprocess.Popen(cmd, stdout=subprocess.PIPE)
 683     try:
 684         shutil.copyfileobj(ffmpeg.stdout, open(videotest, 'wb'))
 685         return True
 686     except:
 687         kill(ffmpeg.pid)
 688         return False
 689
 690 def supported_format(inFile):
 691     if video_info(inFile)['Supported']:
 692         return True
 693     else:
 694         logger.debug('FALSE, file not supported %s' % inFile)
 695         return False
 696
 697 def kill(pid):
 698     logger.debug('killing pid=%s' % str(pid))
 699     if mswindows:
 700         win32kill(pid)
 701     else:
 702         import os, signal
 703         os.kill(pid, signal.SIGTERM)
 704
 705 def win32kill(pid):
 706     import ctypes
 707     handle = ctypes.windll.kernel32.OpenProcess(1, False, pid)
 708     ctypes.windll.kernel32.TerminateProcess(handle, -1)
 709     ctypes.windll.kernel32.CloseHandle(handle)
 710
 711 def gcd(a, b):
 712     while b:
 713         a, b = b, a % b
 714     return a