python 批量压缩手机视频
先安装ffmpeg
pip install ffmpeg-python -i https://pypi.tuna.tsinghua.edu.cn/simple
下面是代码，新建video_compress.py
import sys import os from concurrent.futures import ThreadPoolExecutor, ProcessPoolExecutor # 线程池，进程池 # import zlib import threading # import platform # from PIL import Image import ffmpeg from shutil import copyfile def get_file_dir(file): """获取文件目录通用函数""" fullpath = os.path.abspath(os.path.realpath(file)) return os.path.dirname(fullpath) def SaveVideo(input_file): file_name = os.path.basename(input_file) arr = file_name.split('.') new_file_name = arr[0] + '_compress.' + arr[1] output_path = os.path.join(get_file_dir(input_file), 'compress_output') output_file = os.path.join(output_path, new_file_name) if not os.path.isdir(output_path): os.makedirs(output_path) if (os.path.exists(output_file)): print("已存在，跳过压缩") return # 执行probe执行 probe = ffmpeg.probe(input_file) video_stream = next((stream for stream in probe['streams'] if stream['codec_type'] == 'video'), None) if video_stream is None: print('No video stream found', file=sys.stderr) return # sys.exit(1) # 宽度 width = int(video_stream['width']) # # 高度 height = int(video_stream['height']) # # 帧数 # num_frames = int(video_stream['nb_frames']) # # 时长 # time = (video_stream['duration']) # 比特率 bitrate = (video_stream['bit_rate']) # print('width: {}'.format(width)) # print('height: {}'.format(height)) # print('num_frames: {}'.format(num_frames)) # print('time: {}'.format(time)) # print('bitrate: {}'.format(bitrate)) if ((width == 720 and height == 1280) or (width == 1280 and height == 720)): if (int(bitrate) < 2500 * 1024): print("比特率过小，跳过压缩") try: copyfile(input_file, output_file) except IOError as e: print("Unable to copy file. %s" % e) return elif ((width == 1080 and height == 1920) or (width == 1920 and height == 1080)): if (int(bitrate) < 5000 * 1024): print("比特率过小，跳过压缩") try: copyfile(input_file, output_file) except IOError as e: print("Unable to copy file. %s" % e) return else: if (int(bitrate) < 2000 * 1024): print("比特率过小，跳过压缩") try: copyfile(input_file, output_file) except IOError as e: print("Unable to copy file. %s" % e) return fpsize = os.path.getsize(input_file) / 1024 if fpsize >= 150.0: # 大于150KB的视频需要压缩 compress = "ffmpeg -i {} -r 25 -pix_fmt yuv420p -vcodec libx264 -preset veryslow -crf 26 -profile:v baseline -acodec aac -b:a 96k -strict -2 {}".format(input_file, output_file) isRun = os.system(compress) # if outName: # compress = "ffmpeg -i {} -r 25 -pix_fmt yuv420p -vcodec libx264 -preset veryslow -crf 24 -profile:v baseline -acodec aac -b:a 128k -strict -2 {}".format( # fileInputPath, fileOutPath) # isRun = os.system(compress) # else: # compress = "ffmpeg -i {} -r 10 -pix_fmt yuv420p -vcodec libx264 -preset veryslow -profile:v baseline -crf 23 -acodec aac -b:a 32k -strict -5 {}".format(self.fileInputPath, self.fileInputPath) # isRun = os.system(compress) if isRun != 0: return (isRun, "没有安装ffmpeg") return True else: return True def Compress_Video(self): # 异步保存打开下面的代码，注释同步保存的代码 thr = threading.Thread(target=self.SaveVideo) thr.start() def check_path(input_path): """如果输入的是文件则直接压缩，如果是文件夹则先遍历""" if os.path.isfile(input_path): SaveVideo(input_path) elif os.path.isdir(input_path): dirlist = os.walk(input_path) for root, dirs, files in dirlist: if (not (root.endswith("\\compress_output") or root.endswith("/compress_output"))): i = 0 for filename in files: i = i + 1 SaveVideo(os.path.join(root, filename)) # process_pool.submit(SaveVideo, os.path.join(root, filename)) # compress_by_tinypng(os.path.join(root, filename)) else: print(u'目标文件(夹)不存在，请确认后重试。') if __name__ == "__main__": process_pool = ProcessPoolExecutor(1) # 定义5个进程 b = sys.argv[1:] # 测试压缩 len_param = len(sys.argv) if len_param != 2: print('请使用： %s [inputpath] [outputpath]' % os.path.basename(sys.argv[0])) else: check_path(b[0]) input("Press <enter> 请耐心等待\n")
-crf 控制视频输出质量，取值范围为0-51,0为无损，从主观上讲，18-28是一个合理的范围
最后执行命令 python video_compress.py /Users/xx/test
如果要还原压缩后视频详细信息请参考 https://www.cnblogs.com/xiaocaidev/p/13617120.html
