ffmpegpython_ffmpegpython学习

#增加自动缩进换行

def indent(elem, level&＃61;0):

i&＃61; "\n" &＃43; level*" "

iflen(elem):if not elem.text or notelem.text.strip():

elem.text&＃61; i &＃43; " "

if not elem.tail or notelem.tail.strip():

elem.tail&＃61;ifor elem inelem:

indent(elem, level&＃43;1)if not elem.tail or notelem.tail.strip():

elem.tail&＃61;ielse:if level and (not elem.tail or notelem.tail.strip()):

elem.tail&＃61;idefparse_dfxp_time_expr(time_expr):if nottime_expr:returntime_expr&＃61;time_expr.strip()

mobj&＃61; re.match(r&＃39;^(?P\d&＃43;(?:\.\d&＃43;)?)s?$&＃39;, time_expr)ifmobj:return float(mobj.group(&＃39;time_offset&＃39;))

mobj&＃61; re.match(r&＃39;^(\d&＃43;):(\d\d):(\d\d(?:(?:\.|:)\d&＃43;)?)$&＃39;, time_expr)ifmobj:return 3600 * int(mobj.group(1)) &＃43; 60 * int(mobj.group(2)) &＃43; float(mobj.group(3).replace(&＃39;:&＃39;, &＃39;.&＃39;))def runProc(proc, out, callback, timeOut &＃61; 30):try:

proc_out_closed&＃61;False

start&＃61;time.time()while notproc_out_closed:if (time.time() - start >timeOut):raiseKeyboardInterrupt()

line&＃61; &＃39;&＃39;

whileTrue:

char&＃61; out.read(1)if notchar:

proc_out_closed&＃61;Truebreak

if char in [b&＃39;\r&＃39;, b&＃39;\n&＃39;]:break

try:

line&＃43;&＃61; char.decode(&＃39;ascii&＃39;, &＃39;replace&＃39;)exceptException as ex:continue

if notline:continue

ifisinstance(line, bytes):

line&＃61; line.decode(&＃39;utf-8&＃39;)#print(line) #print可能會有特殊字符而引起的異常

callback(line)return proc.wait() &＃61;&＃61;0exceptKeyboardInterrupt:try:if sys.platform !&＃61; &＃39;win32&＃39;:

proc.communicate(b&＃39;q&＃39;)else:

proc.terminate()except:print(&＃39;except...........&＃39;)returnFalsedef updateInfo(fileName, outputFileName, progress, resultState &＃61; &＃39;working&＃39;, error&＃61;None):ifos.path.exists(fileName):

Tree&＃61;ET.parse(fileName)

ProgressInfoNode&＃61;Tree.getroot()#创建根节点

else:

ProgressInfoNode&＃61; ET.Element(&＃39;ProgressInfo&＃39;)#创建子节点&＃xff0c;并添加属性

GetNode &＃61; lambda child: ProgressInfoNode.find(child) if ProgressInfoNode.find(child)!&＃61;None elseET.SubElement(ProgressInfoNode, child)

Node&＃61; GetNode(&＃39;OutputFileName&＃39;)#ET.SubElement(ProgressInfoNode,&＃39;OutputFileName&＃39;)

Node.text &＃61;outputFileName

Node&＃61; GetNode(&＃39;ResultState&＃39;)#ET.SubElement(ProgressInfoNode, &＃39;ResultState&＃39;)

Node.text &＃61;resultState

Node&＃61; GetNode(&＃39;Progress&＃39;)#ET.SubElement(ProgressInfoNode, &＃39;Progress&＃39;)

Node.text &＃61;str(progress)iferror:

Node&＃61; GetNode(&＃39;error&＃39;)#ET.SubElement(ProgressInfoNode, &＃39;Progress&＃39;)

Node.text &＃61;str(error)#创建elementtree对象&＃xff0c;写文件

indent(ProgressInfoNode,0)

tree&＃61;ET.ElementTree(ProgressInfoNode)

tree.write(fileName, encoding&＃61;"utf-8")