plugins/video/transcode.py

   1 import subprocess, shutil, os, re, sys, ConfigParser, time, lrucache, math
   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['copy_ts'] = select_copyts(tsn)
  49     settings['ffmpeg_pram'] = select_ffmpegprams(tsn)
  50     settings['format'] = select_format(tsn)
  51
  52     cmd_string = config.getFFmpegTemplate(tsn) % settings
  53
  54     cmd = [ffmpeg_path(), '-i', inFile] + cmd_string.split()
  55     print 'transcoding to tivo model '+tsn[:3]+' using ffmpeg command:'
  56     print ' '.join(cmd)
  57     debug_write(__name__, fn_attr(), ['ffmpeg command is ', ' '.join(cmd)])
  58     ffmpeg = subprocess.Popen(cmd, bufsize=512*1024, stdout=subprocess.PIPE)
  59     try:
  60         shutil.copyfileobj(ffmpeg.stdout, outFile)
  61     except:
  62         kill(ffmpeg.pid)
  63
  64 def select_audiocodec(inFile, tsn = ''):
  65     # Default, compatible with all TiVo's
  66     codec = 'ac3'
  67     if config.getAudioCodec(tsn) == None:
  68         type, width, height, fps, millisecs, kbps, akbps, acodec, afreq, par1, par2, dar1, dar2 =  video_info(inFile)
  69         if acodec in ('ac3', 'liba52', 'mp2'):
  70             if akbps == None:
  71                 cmd_string = '-y -vcodec mpeg2video -r 29.97 -b 1000k -acodec copy -t 00:00:01 -f vob -'
  72                 if video_check(inFile, cmd_string):
  73                     type, width, height, fps, millisecs, kbps, akbps, acodec, afreq, par1, par2, dar1, dar2 =  video_info(videotest)
  74             if not akbps == None and int(akbps) <= config.getMaxAudioBR(tsn):
  75                 # compatible codec and bitrate, do not reencode audio
  76                 codec = 'copy'
  77     else:
  78         codec = config.getAudioCodec(tsn)
  79     return '-acodec '+codec
  80
  81 def select_audiofr(inFile, tsn):
  82     freq = '48000'  #default
  83     type, width, height, fps, millisecs, kbps, akbps, acodec, afreq, par1, par2, dar1, dar2 =  video_info(inFile)
  84     if not afreq == None and afreq in ('44100', '48000'):
  85         # compatible frequency
  86         freq = afreq
  87     if config.getAudioFR(tsn) != None:
  88         freq = config.getAudioFR(tsn)
  89     return '-ar '+freq
  90
  91 def select_audioch(tsn):
  92     if config.getAudioCH(tsn) != None:
  93         return '-ac '+config.getAudioCH(tsn)
  94     return ''
  95
  96 def select_copyts(tsn):
  97     if config.getCopyTS(tsn):
  98         return '-copyts'
  99     return ''
 100
 101 def select_videofps(tsn):
 102     vfps = '-r 29.97'  #default
 103     if config.isHDtivo(tsn):
 104         vfps = ' '
 105     if config.getVideoFPS(tsn) != None:
 106         vfps = '-r '+config.getVideoFPS(tsn)
 107     return vfps
 108
 109 def select_videocodec(tsn):
 110     vcodec = 'mpeg2video'  #default
 111     if config.getVideoCodec(tsn) != None:
 112         vcodec = config.getVideoCodec(tsn)
 113     return '-vcodec '+vcodec
 114
 115 def select_videobr(tsn):
 116     return '-b '+config.getVideoBR(tsn)
 117
 118 def select_audiobr(tsn):
 119     return '-ab '+config.getAudioBR(tsn)
 120
 121 def select_maxvideobr():
 122     return '-maxrate '+config.getMaxVideoBR()
 123
 124 def select_buffsize():
 125     return '-bufsize '+config.getBuffSize()
 126
 127 def select_ffmpegprams(tsn):
 128     if config.getFFmpegPrams(tsn) != None:
 129         return config.getFFmpegPrams(tsn)
 130     return ''
 131
 132 def select_format(tsn):
 133     fmt = 'vob'
 134     if config.getFormat(tsn) != None:
 135         fmt = config.getFormat(tsn)
 136     return '-f '+fmt+' -'
 137
 138 def select_aspect(inFile, tsn = ''):
 139     TIVO_WIDTH = config.getTivoWidth(tsn)
 140     TIVO_HEIGHT = config.getTivoHeight(tsn)
 141
 142     type, width, height, fps, millisecs, kbps, akbps, acodec, afreq, par1, par2, dar1, dar2 =  video_info(inFile)
 143
 144     debug_write(__name__, fn_attr(), ['tsn:', tsn])
 145
 146     aspect169 = config.get169Setting(tsn)
 147
 148     debug_write(__name__, fn_attr(), ['aspect169:', aspect169])
 149
 150     optres = config.getOptres(tsn)
 151
 152     debug_write(__name__, fn_attr(), ['optres:', optres])
 153
 154     if optres:
 155         optHeight = config.nearestTivoHeight(height)
 156         optWidth = config.nearestTivoWidth(width)
 157         if optHeight < TIVO_HEIGHT:
 158             TIVO_HEIGHT = optHeight
 159         if optWidth < TIVO_WIDTH:
 160             TIVO_WIDTH = optWidth
 161
 162     d = gcd(height,width)
 163     ratio = (width*100)/height
 164     rheight, rwidth = height/d, width/d
 165
 166     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])
 167
 168     multiplier16by9 = (16.0 * TIVO_HEIGHT) / (9.0 * TIVO_WIDTH)
 169     multiplier4by3  =  (4.0 * TIVO_HEIGHT) / (3.0 * TIVO_WIDTH)
 170
 171     if config.isHDtivo(tsn) and not optres:
 172         if config.getPixelAR(0):
 173             if par2 == None:
 174                 npar = config.getPixelAR(1)
 175             else:
 176                 npar = par2
 177             # adjust for pixel aspect ratio, if set, because TiVo expects square pixels
 178             if npar<1.0:
 179                 return ['-s', str(width) + 'x' + str(int(math.ceil(height/npar)))]
 180             elif npar>1.0:
 181                 # FFMPEG expects width to be a multiple of two
 182                 return ['-s', str(int(math.ceil(width*npar/2.0)*2)) + 'x' + str(height)]
 183         if height <= TIVO_HEIGHT:
 184             # pass all resolutions to S3, except heights greater than conf height
 185             return []
 186         # else, resize video.
 187     if (rwidth, rheight) in [(1, 1)] and par1 == '8:9':
 188         debug_write(__name__, fn_attr(), ['File + PAR is within 4:3.'])
 189         return ['-aspect', '4:3', '-s', str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT)]
 190     elif (rwidth, rheight) in [(4, 3), (10, 11), (15, 11), (59, 54), (59, 72), (59, 36), (59, 54)]:
 191         debug_write(__name__, fn_attr(), ['File is within 4:3 list.'])
 192         return ['-aspect', '4:3', '-s', str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT)]
 193     elif ((rwidth, rheight) in [(16, 9), (20, 11), (40, 33), (118, 81), (59, 27)]) and aspect169:
 194         debug_write(__name__, fn_attr(), ['File is within 16:9 list and 16:9 allowed.'])
 195         return ['-aspect', '16:9', '-s', str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT)]
 196     else:
 197         settings = []
 198         #If video is wider than 4:3 add top and bottom padding
 199         if (ratio > 133): #Might be 16:9 file, or just need padding on top and bottom
 200             if aspect169 and (ratio > 135): #If file would fall in 4:3 assume it is supposed to be 4:3
 201                 if (ratio > 177):#too short needs padding top and bottom
 202                     endHeight = int(((TIVO_WIDTH*height)/width) * multiplier16by9)
 203                     settings.append('-aspect')
 204                     settings.append('16:9')
 205                     if endHeight % 2:
 206                         endHeight -= 1
 207                     if endHeight < TIVO_HEIGHT * 0.99:
 208                         settings.append('-s')
 209                         settings.append(str(TIVO_WIDTH) + 'x' + str(endHeight))
 210
 211                         topPadding = ((TIVO_HEIGHT - endHeight)/2)
 212                         if topPadding % 2:
 213                             topPadding -= 1
 214
 215                         settings.append('-padtop')
 216                         settings.append(str(topPadding))
 217                         bottomPadding = (TIVO_HEIGHT - endHeight) - topPadding
 218                         settings.append('-padbottom')
 219                         settings.append(str(bottomPadding))
 220                     else:   #if only very small amount of padding needed, then just stretch it
 221                         settings.append('-s')
 222                         settings.append(str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT))
 223                     debug_write(__name__, fn_attr(), ['16:9 aspect allowed, file is wider than 16:9 padding top and bottom', ' '.join(settings)])
 224                 else: #too skinny needs padding on left and right.
 225                     endWidth = int((TIVO_HEIGHT*width)/(height*multiplier16by9))
 226                     settings.append('-aspect')
 227                     settings.append('16:9')
 228                     if endWidth % 2:
 229                         endWidth -= 1
 230                     if endWidth < (TIVO_WIDTH-10):
 231                         settings.append('-s')
 232                         settings.append(str(endWidth) + 'x' + str(TIVO_HEIGHT))
 233
 234                         leftPadding = ((TIVO_WIDTH - endWidth)/2)
 235                         if leftPadding % 2:
 236                             leftPadding -= 1
 237
 238                         settings.append('-padleft')
 239                         settings.append(str(leftPadding))
 240                         rightPadding = (TIVO_WIDTH - endWidth) - leftPadding
 241                         settings.append('-padright')
 242                         settings.append(str(rightPadding))
 243                     else: #if only very small amount of padding needed, then just stretch it
 244                         settings.append('-s')
 245                         settings.append(str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT))
 246                     debug_write(__name__, fn_attr(), ['16:9 aspect allowed, file is narrower than 16:9 padding left and right\n', ' '.join(settings)])
 247             else: #this is a 4:3 file or 16:9 output not allowed
 248                 settings.append('-aspect')
 249                 settings.append('4:3')
 250                 endHeight = int(((TIVO_WIDTH*height)/width) * multiplier4by3)
 251                 if endHeight % 2:
 252                     endHeight -= 1
 253                 if endHeight < TIVO_HEIGHT * 0.99:
 254                     settings.append('-s')
 255                     settings.append(str(TIVO_WIDTH) + 'x' + str(endHeight))
 256
 257                     topPadding = ((TIVO_HEIGHT - endHeight)/2)
 258                     if topPadding % 2:
 259                         topPadding -= 1
 260
 261                     settings.append('-padtop')
 262                     settings.append(str(topPadding))
 263                     bottomPadding = (TIVO_HEIGHT - endHeight) - topPadding
 264                     settings.append('-padbottom')
 265                     settings.append(str(bottomPadding))
 266                 else:   #if only very small amount of padding needed, then just stretch it
 267                     settings.append('-s')
 268                     settings.append(str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT))
 269                 debug_write(__name__, fn_attr(), ['File is wider than 4:3 padding top and bottom\n', ' '.join(settings)])
 270
 271             return settings
 272         #If video is taller than 4:3 add left and right padding, this is rare. All of these files will always be sent in
 273         #an aspect ratio of 4:3 since they are so narrow.
 274         else:
 275             endWidth = int((TIVO_HEIGHT*width)/(height*multiplier4by3))
 276             settings.append('-aspect')
 277             settings.append('4:3')
 278             if endWidth % 2:
 279                 endWidth -= 1
 280             if endWidth < (TIVO_WIDTH * 0.99):
 281                 settings.append('-s')
 282                 settings.append(str(endWidth) + 'x' + str(TIVO_HEIGHT))
 283
 284                 leftPadding = ((TIVO_WIDTH - endWidth)/2)
 285                 if leftPadding % 2:
 286                     leftPadding -= 1
 287
 288                 settings.append('-padleft')
 289                 settings.append(str(leftPadding))
 290                 rightPadding = (TIVO_WIDTH - endWidth) - leftPadding
 291                 settings.append('-padright')
 292                 settings.append(str(rightPadding))
 293             else: #if only very small amount of padding needed, then just stretch it
 294                 settings.append('-s')
 295                 settings.append(str(TIVO_WIDTH) + 'x' + str(TIVO_HEIGHT))
 296
 297             debug_write(__name__, fn_attr(), ['File is taller than 4:3 padding left and right\n', ' '.join(settings)])
 298
 299             return settings
 300
 301 def tivo_compatable(inFile, tsn = ''):
 302     supportedModes = [[720, 480], [704, 480], [544, 480], [480, 480], [352, 480]]
 303     type, width, height, fps, millisecs, kbps, akbps, acodec, afreq, par1, par2, dar1, dar2 =  video_info(inFile)
 304     #print type, width, height, fps, millisecs, kbps, akbps, acodec
 305
 306     if (inFile[-5:]).lower() == '.tivo':
 307         debug_write(__name__, fn_attr(), ['TRUE, ends with .tivo.', inFile])
 308         return True
 309
 310     if not type == 'mpeg2video':
 311         #print 'Not Tivo Codec'
 312         debug_write(__name__, fn_attr(), ['FALSE, type', type, 'not mpeg2video.', inFile])
 313         return False
 314
 315     if os.path.splitext(inFile)[-1].lower() in ('.ts', '.mpv'):
 316         debug_write(__name__, fn_attr(), ['FALSE, ext', os.path.splitext(inFile)[-1],\
 317                 'not tivo compatible.', inFile])
 318         return False
 319
 320     if acodec == 'dca':
 321         debug_write(__name__, fn_attr(), ['FALSE, acodec', acodec, ', not supported.', inFile])
 322         return False
 323
 324     if acodec != None:
 325         if not akbps or int(akbps) > config.getMaxAudioBR(tsn):
 326             debug_write(__name__, fn_attr(), ['FALSE,', akbps, 'kbps exceeds max audio bitrate.', inFile])
 327             return False
 328
 329     if kbps != None:
 330         abit = max('0', akbps)
 331         if int(kbps)-int(abit) > config.strtod(config.getMaxVideoBR())/1000:
 332             debug_write(__name__, fn_attr(), ['FALSE,', kbps, 'kbps exceeds max video bitrate.', inFile])
 333             return False
 334     else:
 335         debug_write(__name__, fn_attr(), ['FALSE,', kbps, 'kbps not supported.', inFile])
 336         return False
 337
 338     if config.isHDtivo(tsn):
 339         if par2 != 1.0:
 340             if config.getPixelAR(0):
 341                 if par2 != None or config.getPixelAR(1) != 1.0:
 342                     debug_write(__name__, fn_attr(), ['FALSE,', par2, 'not correct PAR,', inFile])
 343                     return False
 344         debug_write(__name__, fn_attr(), ['TRUE, HD Tivo detected, skipping remaining tests', inFile])
 345         return True
 346
 347     if not fps == '29.97':
 348         #print 'Not Tivo fps'
 349         debug_write(__name__, fn_attr(), ['FALSE,', fps, 'fps, should be 29.97.', inFile])
 350         return False
 351
 352     if not config.get169Setting(tsn):
 353         if dar1 == None or not dar1 in ('4:3', '8:9'):
 354             debug_write(__name__, fn_attr(), ['FALSE, DAR', dar1, 'not supported by BLACKLIST_169 tivos.', inFile])
 355             return False
 356
 357     for mode in supportedModes:
 358         if (mode[0], mode[1]) == (width, height):
 359             #print 'Is TiVo!'
 360             debug_write(__name__, fn_attr(), ['TRUE,', width, 'x', height, 'is valid.', inFile])
 361             return True
 362     #print 'Not Tivo dimensions'
 363     debug_write(__name__, fn_attr(), ['FALSE,', width, 'x', height, 'not in supported modes.', inFile])
 364     return False
 365
 366 def video_info(inFile):
 367     mtime = os.stat(inFile).st_mtime
 368     if inFile != videotest:
 369         if inFile in info_cache and info_cache[inFile][0] == mtime:
 370             debug_write(__name__, fn_attr(), ['CACHE HIT!', inFile])
 371             return info_cache[inFile][1]
 372
 373     if (inFile[-5:]).lower() == '.tivo':
 374         info_cache[inFile] = (mtime, (True, True, True, True, True, True, True, True, True, True, True, True, True))
 375         debug_write(__name__, fn_attr(), ['VALID, ends in .tivo.', inFile])
 376         return True, True, True, True, True, True, True, True, True, True, True, True, True
 377
 378     cmd = [ffmpeg_path(), '-i', inFile ]
 379     ffmpeg = subprocess.Popen(cmd, stderr=subprocess.PIPE, stdout=subprocess.PIPE, stdin=subprocess.PIPE)
 380
 381     # wait 10 sec if ffmpeg is not back give up
 382     for i in xrange(200):
 383         time.sleep(.05)
 384         if not ffmpeg.poll() == None:
 385             break
 386
 387     if ffmpeg.poll() == None:
 388         kill(ffmpeg.pid)
 389         info_cache[inFile] = (mtime, (None, None, None, None, None, None, None, None, None, None, None, None, None))
 390         return None, None, None, None, None, None, None, None, None, None, None, None, None
 391
 392     output = ffmpeg.stderr.read()
 393     debug_write(__name__, fn_attr(), ['ffmpeg output=', output])
 394
 395     rezre = re.compile(r'.*Video: ([^,]+),.*')
 396     x = rezre.search(output)
 397     if x:
 398         codec = x.group(1)
 399     else:
 400         info_cache[inFile] = (mtime, (None, None, None, None, None, None, None, None, None, None, None, None, None))
 401         debug_write(__name__, fn_attr(), ['failed at video codec'])
 402         return None, None, None, None, None, None, None, None, None, None, None, None, None
 403
 404     rezre = re.compile(r'.*Video: .+, (\d+)x(\d+)[, ].*')
 405     x = rezre.search(output)
 406     if x:
 407         width = int(x.group(1))
 408         height = int(x.group(2))
 409     else:
 410         info_cache[inFile] = (mtime, (None, None, None, None, None, None, None, None, None, None, None, None, None))
 411         debug_write(__name__, fn_attr(), ['failed at width/height'])
 412         return None, None, None, None, None, None, None, None, None, None, None, None, None
 413
 414     rezre = re.compile(r'.*Video: .+, (.+) (?:fps|tb).*')
 415     x = rezre.search(output)
 416     if x:
 417         fps = x.group(1)
 418     else:
 419         info_cache[inFile] = (mtime, (None, None, None, None, None, None, None, None, None, None, None, None, None))
 420         debug_write(__name__, fn_attr(), ['failed at fps'])
 421         return None, None, None, None, None, None, None, None, None, None, None, None, None
 422
 423     # Allow override only if it is mpeg2 and frame rate was doubled to 59.94
 424     if (not fps == '29.97') and (codec == 'mpeg2video'):
 425         # First look for the build 7215 version
 426         rezre = re.compile(r'.*film source: 29.97.*')
 427         x = rezre.search(output.lower() )
 428         if x:
 429             debug_write(__name__, fn_attr(), ['film source: 29.97 setting fps to 29.97'])
 430             fps = '29.97'
 431         else:
 432             # for build 8047:
 433             rezre = re.compile(r'.*frame rate differs from container frame rate: 29.97.*')
 434             debug_write(__name__, fn_attr(), ['Bug in VideoReDo'])
 435             x = rezre.search(output.lower() )
 436             if x:
 437                 fps = '29.97'
 438
 439     durre = re.compile(r'.*Duration: (.{2}):(.{2}):(.{2})\.(.),')
 440     d = durre.search(output)
 441     if d:
 442         millisecs = ((int(d.group(1))*3600) + (int(d.group(2))*60) + int(d.group(3)))*1000 + (int(d.group(4))*100)
 443     else:
 444         millisecs = 0
 445
 446     #get bitrate of source for tivo compatibility test.
 447     rezre = re.compile(r'.*bitrate: (.+) (?:kb/s).*')
 448     x = rezre.search(output)
 449     if x:
 450         kbps = x.group(1)
 451     else:
 452         kbps = None
 453         debug_write(__name__, fn_attr(), ['failed at kbps'])
 454
 455     #get audio bitrate of source for tivo compatibility test.
 456     rezre = re.compile(r'.*Audio: .+, (.+) (?:kb/s).*')
 457     x = rezre.search(output)
 458     if x:
 459         akbps = x.group(1)
 460     else:
 461         akbps = None
 462         debug_write(__name__, fn_attr(), ['failed at akbps'])
 463
 464     #get audio codec of source for tivo compatibility test.
 465     rezre = re.compile(r'.*Audio: ([^,]+),.*')
 466     x = rezre.search(output)
 467     if x:
 468         acodec = x.group(1)
 469     else:
 470         acodec = None
 471         debug_write(__name__, fn_attr(), ['failed at acodec'])
 472
 473     #get audio frequency of source for tivo compatibility test.
 474     rezre = re.compile(r'.*Audio: .+, (.+) (?:Hz).*')
 475     x = rezre.search(output)
 476     if x:
 477         afreq = x.group(1)
 478     else:
 479         afreq = None
 480         debug_write(__name__, fn_attr(), ['failed at afreq'])
 481
 482     #get par.
 483     rezre = re.compile(r'.*Video: .+PAR ([0-9]+):([0-9]+) DAR [0-9:]+.*')
 484     x = rezre.search(output)
 485     if x and x.group(1)!="0" and x.group(2)!="0":
 486         par1, par2 = x.group(1)+':'+x.group(2), float(x.group(1))/float(x.group(2))
 487     else:
 488         par1, par2 = None, None
 489
 490     #get dar.
 491     rezre = re.compile(r'.*Video: .+DAR ([0-9]+):([0-9]+).*')
 492     x = rezre.search(output)
 493     if x and x.group(1)!="0" and x.group(2)!="0":
 494         dar1, dar2 = x.group(1)+':'+x.group(2), float(x.group(1))/float(x.group(2))
 495     else:
 496         dar1, dar2 = None, None
 497
 498     info_cache[inFile] = (mtime, (codec, width, height, fps, millisecs, kbps, akbps, acodec, afreq, par1, par2, dar1, dar2))
 499     debug_write(__name__, fn_attr(), ['Codec=', codec, ' width=', width, ' height=', height, ' fps=', fps, ' millisecs=', millisecs, ' kbps=', kbps, ' akbps=', akbps, ' acodec=', acodec, ' afreq=', afreq, ' par=', par1, par2, ' dar=', dar1, dar2])
 500     return codec, width, height, fps, millisecs, kbps, akbps, acodec, afreq, par1, par2, dar1, dar2
 501
 502 def video_check(inFile, cmd_string):
 503     cmd = [ffmpeg_path(), '-i', inFile] + cmd_string.split()
 504     ffmpeg = subprocess.Popen(cmd, stdout=subprocess.PIPE)
 505     try:
 506         shutil.copyfileobj(ffmpeg.stdout, open(videotest, 'wb'))
 507         return True
 508     except:
 509         kill(ffmpeg.pid)
 510         return False
 511
 512 def supported_format(inFile):
 513     if video_info(inFile)[0]:
 514         return True
 515     else:
 516         debug_write(__name__, fn_attr(), ['FALSE, file not supported', inFile])
 517         return False
 518
 519 def kill(pid):
 520     debug_write(__name__, fn_attr(), ['killing pid=', str(pid)])
 521     if mswindows:
 522         win32kill(pid)
 523     else:
 524         import os, signal
 525         os.kill(pid, signal.SIGTERM)
 526
 527 def win32kill(pid):
 528         import ctypes
 529         handle = ctypes.windll.kernel32.OpenProcess(1, False, pid)
 530         ctypes.windll.kernel32.TerminateProcess(handle, -1)
 531         ctypes.windll.kernel32.CloseHandle(handle)
 532
 533 def gcd(a,b):
 534     while b:
 535         a, b = b, a % b
 536     return a
 537