python使用zlib库压缩图片，使用ffmpeg压缩视频

本是古典何须时尚 2022-02-03 11:27 234阅读 0赞

## python压缩图片、视频 ##

图片压缩使用zlib库  
视频压缩使用工具ffmpeg

# ffmpeg -i 1.mp4 -r 10 -pix_fmt yuv420p -vcodec libx264 -preset veryslow -profile:v baseline -crf 23 -acodec aac -b:a 32k -strict -5 147fss.mp4
    # -i 输入的视频文件
    # -r 每一秒的帧数,一秒10帧大概就是人眼的速度
    # -pix_fmt 设置视频颜色空间 yuv420p网络传输用的颜色空间 ffmpeg -pix_fmts可以查看有哪些颜色空间选择
    # -vcodec 软件编码器，通用稳定
    # -preset 编码机预设 编码机预设越高占用CPU越大 有十个参数可选 ultrafast superfast veryfast(录制视频选用) faster fast medium(默认) slow slower veryslow(压制视频时一般选用) pacebo
    # -profile:v 压缩比的配置 越往左边压缩的越厉害，体积越小 baseline(实时通信领域一般选用，画面损失越大) Extended Main(流媒体选用) High(超清视频) High 10 High 4:2:2 High 4:4:4(Predictive)
    # -level:v 对编码机的规范和限制针对不通的使用场景来操作,也就是不同分辨率设置不同的值
    # -crf 码率控制模式 用于对画面有要求，对文件大小无关紧要的场景 0-51都可以选择 0为无损 一般设置18 - 28之间 大于28画面损失严重
    # -acodec 设置音频编码器
    
    '''
    
    
    import sys
    
    from PIL import Image
    import os
    import zlib
    import threading
    import platform
    
    
    class ZipPictureOrVideo(object):
        """ 压缩图片、视频 """
        def __init__(self, filePath, inputName, outName=""):
            self.filePath = filePath  # 文件地址
            self.inputName = inputName  # 输入的文件名字
            self.outName = outName  # 输出的文件名字
            self.system_ = platform.platform().split("-", 1)[0]
            if self.system_ == "Windows":
                self.filePath = (self.filePath + "\\") if self.filePath.rsplit("\\", 1)[-1] else self.filePath
            elif self.system_ == "Linux":
                self.filePath = (self.filePath + "/") if self.filePath.rsplit("/", 1)[-1] else self.filePath
            self.fileInputPath = self.filePath + inputName
            self.fileOutPath = self.filePath + outName
    
        @property
        def is_picture(self):
            """ 判断文件是否为图片 :return: """
            picSuffixSet = { "BMP", "GIF", "JPEG", "TIFF", "PNG", "SVG", "PCX", "WMF", "EMF", "LIC", "EPS", "TGA", "JPG"}
            suffix = self.fileInputPath.rsplit(".", 1)[-1].upper()
            if suffix in picSuffixSet:
                return True
            else:
                return False
    
        @property
        def is_video(self):
            """ 判断文件是否为视频 :return: """
            videoSuffixSet = { "WMV", "ASF", "ASX", "RM", "RMVB", "MP4", "3GP", "MOV", "M4V", "AVI", "DAT", "MKV", "FIV",
                              "VOB"}
            suffix = self.fileInputPath.rsplit(".", 1)[-1].upper()
            if suffix in videoSuffixSet:
                return True
            else:
                return False
    
        def compress_picture(self):
            """ 压缩图片 :return: """
            fpsize = os.path.getsize(self.fileInputPath) / 1024  # 获得图片多少K os.path.getsize(self.picPath)返回的是字节
            if fpsize >= 50.0:  # 是否大于50K
                im = Image.open(self.fileInputPath)  # 打开图片
                imBytes = im.tobytes()  # 把图片转换成bytes流
                imBytes = zlib.compress(imBytes, 5)  # 对图像字节串进行压缩
                im2 = Image.frombytes('RGB', im.size, zlib.decompress(imBytes))  # 压缩成新的图片
                if self.outName:
                    im2.save(self.fileOutPath)  # 不覆盖原图
                    return (self.fileOutPath, os.path.getsize(self.fileOutPath))
                else:
                    im2.save(self.fileInputPath)  # 覆盖原图
                    return (self.fileInputPath, os.path.getsize(self.fileInputPath))
            else:
                return True
    
        def compress_video(self):
            """ 压缩视频 :return: """
            fpsize = os.path.getsize(self.fileInputPath) / 1024
            if fpsize >= 150.0:  # 大于150KB的视频需要压缩
                if self.outName:
                    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.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,在Linux使用【apt install ffmpeg】安装，windows去【ffmpeg】官网下载")
                return True
            else:
                return True
    
        def start_compress_pic(self, is_async=True):
            """ 开始压缩图片 :param is_async: 是否为异步压缩，默认为TRue :return: """
            if is_async:
                # 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.compress_picture)
                thr.start()
            else:
                # 下面为同步保存
                self.compress_picture()
    
        def start_compress_video(self, is_async=True):
            """ 开始压缩视频 :param is_async: 是否为异步压缩，默认为TRue :return: """
            if is_async:
                # 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.compress_video)
                thr.start()
            else:
                # 下面为同步代码
                self.compress_video()
    
    
    if __name__ == "__main__":
        # 输入文件路径
        args = sys.argv[1:]
        file = ZipPictureOrVideo(args[0], args[1], args[2])
        if file.is_picture:
            print(file.start_compress_pic())
        elif file.is_video:
            print(file.start_compress_video())
        else:
            print('该文件不是图片或者视频')

参考文章：【[https://blog.csdn.net/a849992683/article/details/90030326】][https_blog.csdn.net_a849992683_article_details_90030326]

[https_blog.csdn.net_a849992683_article_details_90030326]: https://blog.csdn.net/a849992683/article/details/90030326%E3%80%91