使用Python 编写的 ffmepg 处理视频的脚本¶

拼接视频片段¶

#!/usr/bin/env python
# -*- coding:utf-8 -*-
"""
使用 ffmpeg 截取视频片段并且重新拼接
使用方式:
提供文件格式如下:比如 input.txt
./input.mp4
00:01:00 00:02:00
00:04:00 00:08:00
"""
importos
importsys
CONCAT_FILE = '_concat.txt'
defread_input(filepath):
 with open(filepath) as f:
 lines = f.readlines()
 input_mp4 = lines[0].strip()
 suffix = input_mp4.split('.')[-1]
 for idx, start_end_time in enumerate(lines[1:]):
 pair = start_end_time.split()
 start, end = pair[0], pair[1]
 part_name = 'part_' + str(idx) + '.' + suffix
 cmd = "ffmpeg -i {} -ss {} -to {} -c copy {}".format(
 input_mp4, start, end, part_name
 )
 print(cmd)
 os.system(cmd)
 yield part_name
defwrite_part_to_file(part_list):
 dir_path = os.path.dirname(os.path.realpath(__file__))
 filepath_list = []
 for part_name in part_list:
 print(part_name)
 path = os.path.join(dir_path, part_name)
 filepath_list.append(path)
 with open(CONCAT_FILE, 'w') as f:
 for path in filepath_list:
 f.write("file '{}'\n".format(path))
 return filepath_list
defconcat_video():
 cmd = "ffmpeg -f concat -safe 0 -i {} -c copy output.mp4".format(CONCAT_FILE)
 os.system(cmd)
defremove(filepath_list):
"""移除中间文件"""
 for path in filepath_list + [CONCAT_FILE]:
 if os.path.exists(path):
 os.remove(path)
defmain():
 try:
 inputfile = sys.argv[1]
 except KeyError:
 print('must need input.txt')
 partnames = list(read_input(inputfile))
 filepath_list = write_part_to_file(partnames)
 concat_video()
 remove(filepath_list)
if __name__ == '__main__':
 main()

递归统计一个文件夹下的所有视频时长¶

# -*- coding: utf-8 -*-
"""
递归统计一个目录下所有视频文件的总时长。比如笔者用来统计课程的内容总时长。
pip install moviepy
如果安装报错,尝试升级
pip install --upgrade setuptools
使用方法:
python compute_duration.py --path ~/Movies/ --type .mp4
参考:https://blog.csdn.net/qq_22210253/article/details/86684658
"""
importos
importdatetime
importargparse
frommoviepy.editorimport VideoFileClip
defmain():
 parser = argparse.ArgumentParser(
 description='Compute Total Time of a Series of Videos')
 parser.add_argument("--path", metavar="PATH", default=".",
 help="the root path of the videos(default: .)")
 parser.add_argument("--type", metavar="TYPE", default=".mkv",
 help="the type of the videos(default: .mkv)")
 args = parser.parse_args()
 filelist = []
 for a, b, c in os.walk(args.path):
 for name in c:
 fname = os.path.join(a, name)
 if fname.endswith(args.type):
 filelist.append(fname)
 ftime = 0.0
 for file in sorted(filelist):
 clip = VideoFileClip(file)
 print("{}: {}秒".format(file, clip.duration))
 ftime += clip.duration
 print("%d seconds: " % ftime, str(datetime.timedelta(seconds=ftime)))
if __name__ == "__main__":
 main()