python整合ffmpeg实现视频文件的批量转换

/root//root2/video/origin

# coding=gb2312import stringimport os import timeimport reimport sysfrom optparse import OptionParser parser = OptionParser()#parser.add_option("-i", "--input", dest="input",action="store_true",help="input x y for each file by user")parser.add_option("-q", "--quality", dest="q",action="store",help="input xvid q arg",default="24")parser.add_option("-v", "--vcodec", dest="vcodec",action="store",help="input video codec",default="x264")parser.add_option("-n", "--noaudio", dest="an",action="store_true",help="no audio")parser.add_option("-p", "--preset", dest="preset",action="store",help="",default="")parser.add_option("-m", "--maxWidth", dest="maxWidth",action="store",help="input max width for output video",default="")parser.add_option("-f", "--fileType", dest="fileType",action="store",help="",default="mp4")parser.add_option("-o", "--ogg", dest="ogg",action="store_true",help="user ogg instead of aac",default="")parser.add_option("-3", "--mp3", dest="mp3",action="store_true",help="user mp3 instead of aac",default="")parser.add_option("-1", "--pad", dest="pad",action="store_true",help="pad to 16:9",default="")parser.add_option("-s", "--src", dest="srcD",action="store",help="source dir",default="/usr/disk2/root/video/origin")parser.add_option("-t", "--target", dest="targetD",action="store",help="target dir",default="/usr/disk2/root/video/ok")parser.add_option("-w", "--workdir", dest="workdir",action="store",help="work dir",default="/root/root2/video") (options, args) = parser.parse_args() if options.srcD==None or options.srcD[0:1]=='-': print 'srcD Err, quit' exit() if options.targetD==None or options.targetD[0:1]=='-': print 'targetD Err, quit' exit() if options.fileType==None or options.fileType[0:1]=='-': print 'fileType Err, quit' exit() if options.workdir==None or options.workdir[0:1]=='-': print 'workdir Err, quit' exit()  #遍历origin下的文件for root,dirs,files in os.walk(options.srcD):  for name in files: name= name.replace('[','''/[''')#对文件名中的[进行转义 newname =name[0: name.rindex('.')]   #运行一次ffmpeg,获取分辨率 (si, so, se) = os.popen3('cd '+options.workdir+';mkdir -p ffm; rm -f ffm/ffm.txt ; csh -c "(ffmpeg -i '+options.srcD+'/' +name+ ' >& ffm/ffm.txt)"; grep Stream ffm/ffm.txt')  t=so.readlines()  ti=0 for line in se.readlines() :  print line   width=0 height=0  reg='''^/s*Stream.*,/s*(/d+)x(/d+)(?: /[SAR|,)''' #Stream #0.0: Video: RV40 / 0x30345652, 1020x572, 23 fps, 23 tbr, 23 tbn, 23 tbc for line in t:  result = re.compile(reg).findall(line)   for c in result:  print name+' '+c[0] + 'x' + c[1]  width=string.atoi(c[0])  height=string.atoi(c[1])  if name[0:3]=='M2U' and width==720 and height==576:#m2U开头的，宽度是720x576的，是4：3存储16：9的，将其转换为16：9   width=1024     if width==0:  print 'error parsing width and height'  exit()  vc='' qstr='' astr='' vpre=''  s=''  if options.maxWidth!='':  if width>string.atoi(options.maxWidth):  height = height * string.atoi(options.maxWidth) / width  width = string.atoi(options.maxWidth)   padStr='' if options.pad==True:  if height*16/9 - width>10:#宽度不够  padStr=' -vf "pad='+str(height*16/9)+':'+str(height)+':'+str((height*16/9 - width)/2)+':0:black"'  elif width - height*16/9 >10:#高度不够  padStr=' -vf "pad='+str(width)+':'+str(width*9/16)+':0:'+str((width - height*16/9)/2)+':black"'   s=' -s '+str(width)+'x'+str(height)+padStr print 'adjust',s  if options.preset!='':  vpre=' -vpre '+options.preset  if options.an==True:  astr=' -an' elif options.ogg==True:  astr=' -acodec libvorbis -ar 44100 -ab 64K' elif options.mp3==True:  astr=' -acodec libmp3lame -ar 44100 -ab 64K' else:  astr=' -acodec libfaac -ar 44100 -ab 64K'   if options.vcodec=='vp8':  vc='libvpx'  qstr=" -qmin "+options.q+" -qmax "+options.q elif options.vcodec=='x264':  vc='libx264'  qstr=" -crf "+options.q elif options.vcodec=='xvid':  vc='libxvid'  qstr=" -qmin "+options.q+" -qmax "+options.q   cmd ='csh -c "' + "cd "+options.workdir+";touch ffm/output.log;(ffmpeg -y -i "+options.srcD+"/"+name+astr+" -vcodec "+vc+vpre+qstr+s+" -r 25 -threads 8 "+options.targetD+"/"+newname+"."+options.fileType + ' >>& ffm/output.log)"' print cmd  #运行 (si, so, se) = os.popen3(cmd) for line in se.readlines() :#打印输出  print line for line in so.readlines() :#打印输出  print line   #print cmd,'  finish'#再显示一次命令