Python 3.x ffmpeg使用帧persecond分解视频

有一个命令，用于每秒提取一帧视频的图像

ffmpeg -i "vide.mp4" -vf fps=1 frames/frame_%04d.png -hide_banner

ffmpeg中是否有一个命令，可以像上面的命令那样剪切提供fps的视频并将其保存为视频（.mp4/avi）文件

我现在拥有的是我创建了一个方法来剪切带有开始和结束时间的视频，但是我首先创建了一个方法来获取视频的长度，这样我就可以根据上面命令生成的帧数来剪切视频

 def get_length(self):
        """
        Gets the length of a video in seconds

        Returns:
            float : Length of the video
        """

        print("Getting video length: " + self.video_string_path)
        command = 'ffprobe -i "'+self.video_string_path+'" -show_entries format=duration -v quiet -of csv="p=0"'
        self.command = command
        length = str(cmd.execute(command)).strip()
        print("lenght: "+length+" second(s)")
        return float(length)

def cut(self, start_time, duration, output_file_name = 'output_file_name.mp4', save_to =''):
        """
        Cut a video on a specific start time of the video and duration.
        Check ffmpeg documentation https://ffmpeg.org/ffmpeg.html for more information about the parameters

        Parameters:
            start_time : string
                is the value of ffmpeg -ss with the format: 00:00:00.000

            duration : string | int | float
                is the end point where the video will be cut. Can be the same with start_time format but it could also handle integer as in seconds

            output_file_name : string
                is the file name once the file is save in the hardisk

            save_to : string | optional
                is the directory where the file will be saved

        Returns:
            string: file location of the cutted video

        """

        self.make_sure_save_dir_exits(save_to)
        print('Cutting ' + self.video_string_path + ' from ' + start_time + ' to ' + str(duration))
        print('Please wait...')
        file = '"' + self.save_to + output_file_name + '"'
        command = 'ffmpeg -i "' + self.video_string_path + '" -ss ' + str(start_time) + ' -t ' + str(duration) + ' -c copy -y ' + file
        self.command = command
        cmd.execute(command)

        file_loc = self.get_save_to_dir() + output_file_name
        print('Done: Output file was saved to "' + file_loc + '"')

        return file_loc + output_file_name

使用

其中X是输出帧率

---

要分割整个文件

ffmpeg -i "vide.mp4" -vf fps=X
  -f segment -segment_time {duration} -force_key_frames expr:gte(t,n_forced*{duration}) 
  -reset_timestamps 1 -segment_time_delta 1.0 -c:a copy out%d.mp4

---

另一种将视频分割成小块的方法是下面的命令

ffmpeg -i somefile.mp3 -f segment -segment_time 3 -c copy out%03d.mp3

---

Hi Mulvya，有没有办法自动分割整个视频，只需指定每个剪辑的长度？Hi@Gyan。我曾在ubuntu上尝试过这个命令，但在意外的标记“`”附近出现bash:syntax错误（为此我问了另一个问题）

ffmpeg -i somefile.mp3 -f segment -segment_time 3 -c copy out%03d.mp3