# coding=utf-8
import os
import subprocess
import datetime
import json, pprint
import re, time
import threading
import random
import shutil


class FFmpeg:

  def __init__(self, editvdo, addlogo=None, addmusic=None,
         addvdohead=None, addvdotail=None):
    self.editvdo = editvdo
    self.addlogo = addlogo
    self.addmusic = addmusic
    self.addvdohead = addvdohead
    self.addvdotail = addvdotail
    self.vdo_time, self.vdo_width, self.vdo_height, self.attr_dict = self.get_attr()
    self.editvdo_path = os.path.dirname(editvdo)
    self.editvdo_name = os.path.basename(editvdo)

  def get_attr(self):
    """
    獲取視頻屬性參數(shù)
    :return:
    """
    strcmd = r'ffprobe -print_format json -show_streams -i "{}"'.format(self.editvdo)
    status, output = subprocess.getstatusoutput(strcmd)
    agrs = eval(re.search('{.*}', output, re.S).group().replace("\n", "").replace(" ", ''))
    streams = agrs.get('streams', [])
    agrs_dict = dict()
    [agrs_dict.update(x) for x in streams]
    vdo_time = agrs_dict.get('duration')
    vdo_width = agrs_dict.get('width')
    vdo_height = agrs_dict.get('height')
    attr = (vdo_time, vdo_width, vdo_height, agrs_dict)
    return attr

  def edit_head(self, start_time, end_time, deposit=None):
    """
    截取指定長度視頻
    :param second: 去除開始的多少秒
    :param deposit: 另存為文件
    :return: True/Flase
    """
    if None == deposit:
      deposit = self.editvdo_path+'/'+'edit_head'+self.editvdo_name
    start = time.strftime('%H:%M:%S', time.gmtime(start_time))
    end = time.strftime('%H:%M:%S', time.gmtime(end_time))
    strcmd = 'ffmpeg -i "{}" -vcodec copy -acodec copy -ss {} -to {} "{}" -y'.format(
      self.editvdo, start, end, deposit)
    result = subprocess.run(args=strcmd, stdout=subprocess.PIPE, shell=True)
    if os.path.exists(deposit):
      os.remove(self.editvdo)
      os.rename(deposit, self.editvdo)
      return True
    else:
      return False

  def edit_logo(self, deposit=None):
    """
    添加水印
    :param deposit:添加水印后另存為路徑，為空則覆蓋
    :return: True/False
    """
    if None == deposit:
      deposit = self.editvdo_path+'/'+'edit_logo'+self.editvdo_name
    strcmd = r'ffmpeg -i "{}" -vf "movie=\'{}\' [watermark];[in] ' \
         r'[watermark] overlay=main_w-overlay_w-10:10 [out]" "{}"'.format(
          self.editvdo, self.addlogo, deposit)
    result = subprocess.run(args=strcmd, stdout=subprocess.PIPE, shell=True)
    if os.path.exists(deposit):
      os.remove(self.editvdo)
      os.rename(deposit, self.editvdo)
      return True
    else:
      return False

  def edit_music(self, deposit=None):
    if None == deposit:
      deposit = self.editvdo_path+'/'+'edit_music'+self.editvdo_name
    strcmd = r'ffmpeg -y -i "{}" -i "{}" -filter_complex "[0:a] ' \
         r'pan=stereo|c0=1*c0|c1=1*c1 [a1], [1:a] ' \
         r'pan=stereo|c0=1*c0|c1=1*c1 [a2],[a1][a2]amix=duration=first,' \
         r'pan=stereo|c0<c0+c1|c1<c2+c3,pan=mono|c0=c0+c1[a]" ' \
         r'-map "[a]" -map 0:v -c:v libx264 -c:a aac ' \
         r'-strict -2 -ac 2 "{}"'.format(self.editvdo, self.addmusic, deposit)
    result = subprocess.run(args=strcmd, stdout=subprocess.PIPE, shell=True)
    if os.path.exists(deposit):
      os.remove(self.editvdo)
      os.rename(deposit, self.editvdo)
      return True
    else:
      return False

  def edit_rate(self, rete=30, deposit=None):
    """
    改變幀率
    :param rete: 修改大小幀率
    :param deposit: 修改后保存路徑
    :return:
    """
    if None == deposit:
      deposit = self.editvdo_path+'/'+'edit_music'+self.editvdo_name
    strcmd = r'ffmpeg -i "{}" -r {} "{}"' % (self.editvdo, rete, deposit)
    result = subprocess.run(args=strcmd, stdout=subprocess.PIPE, shell=True)
    if os.path.exists(deposit):
      os.remove(self.editvdo)
      os.rename(deposit, self.editvdo)
      return True
    else:
      return False

  def edit_power(self, power='1280x720', deposit=None):
    """
    修改分辨率
    :param power: 分辨率
    :param deposit: 修改后保存路徑，為空則覆蓋
    :return:
    """
    if None == deposit:
      deposit = self.editvdo_path+'/'+'edit_power'+self.editvdo_name
    strcmd = r'ffmpeg -i "{}" -s {} "{}"'.format(self.editvdo, power, deposit)
    result = subprocess.run(args=strcmd, stdout=subprocess.PIPE, shell=True)
    if os.path.exists(deposit):
      os.remove(self.editvdo)
      os.rename(deposit, self.editvdo)
      return True
    else:
      return False

  def rdit_marge(self, vdo_head, vdo_tail, deposit=None):
    if None == deposit:
      deposit = self.editvdo_path+'/'+'rdit_marge'+self.editvdo_name
    with open(self.editvdo_path+'/'+'rdit_marge.txt', 'w', encoding='utf-8') as f:
      f.write("file '{}' \nfile '{}' \nfile '{}'" .format(
        vdo_head, self.editvdo, vdo_tail))
    strcmd = r'ffmpeg -f concat -safe 0 -i "{}" -c copy "{}"'.format(
      self.editvdo_path + '/' + 'rdit_marge.txt', deposit)
    result = subprocess.run(args=strcmd, stdout=subprocess.PIPE, shell=True)
    if os.path.exists(deposit):
      os.remove(self.editvdo)
      os.rename(deposit, self.editvdo)
      return True
    else:
      return False



  # ffmpeg - i input.mkv - filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" - map"[v]" - map"[a]" output.mkv



test = FFmpeg(r"D:\vdio\4.mp4")
pass