目录

mp4转264

wav从60帧，降采样到30帧

---

mp4转264

import os
import subprocess

def extract_video(input_file, output_file):
    command = [
        'ffmpeg',
        '-i', input_file,
        '-vcodec', 'copy',
        '-an',
        '-bsf:v', 'h264_mp4toannexb',
        '-f', 'h264',
        output_file
    ]

    try:
        subprocess.run(command, check=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        print("视频提取成功，保存为：", output_file)
    except subprocess.CalledProcessError as e:
        print("在处理视频时出现错误：", e.stderr.decode())

relative_path='aa.mp4'
absolute_path = os.path.abspath(relative_path)
# 使用示例
extract_video(absolute_path, 'output11.264')

wav从60帧，降采样到30帧

import subprocess


def change_sample_rate(input_file, output_file, new_sample_rate):
    command = [
        'ffmpeg',
        '-i', input_file,
        '-ar', str(new_sample_rate),
        output_file
    ]

    try:
        subprocess.run(command, check=True)
        print(f"音频采样率已转换，输出文件为：{output_file}")
    except subprocess.CalledProcessError as e:
        print("音频采样率转换失败:", e)

# 示例调用
change_sample_rate('output11.wav', 'output.wav', 24000)