将视频m4s文件转换为mp4格式

将视频m4s文件转换为mp4格式

一般情况：偏大的文件为视频，偏小的文件为音频。
环境要求：下载并安装ffmpeg，并配置好环境变量，如下图：

转换代码：

import subprocess

def merge_m4s_to_mp4(video_path, audio_path, output_path):
    """
    使用 FFmpeg 将 m4s 视频和音频流合并为 MP4 文件。
    :param video_path: 视频 m4s 文件路径
    :param audio_path: 音频 m4s 文件路径
    :param output_path: 输出的 mp4 文件路径
    """
    command = [
        "ffmpeg", "-y", "-i", video_path, "-i", audio_path,
        "-c:v", "copy", "-c:a", "aac", "-strict", "experimental", output_path
    ]
    
    try:
        subprocess.run(command, check=True)
        print(f"转换完成: {output_path}")
    except subprocess.CalledProcessError as e:
        print(f"转换失败: {e}")

if __name__ == "__main__":
    # 示例：手动指定文件路径 

    video_path='1452544206/1452544206-1-30080.m4s',
    audio_path='1452544206/1452544206-1-30280.m4s'
    
    # 示例调用
    video_file = video_path
    audio_file = audio_path
    output_file = "output222.mp4"
    merge_m4s_to_mp4(video_file, audio_file, output_file)    

在上述操作前，应先将文件头的0字符串都删除，可用notepad++操作，或用python执行如下代码：

import os 
 
def remove_leading_zeros(file_path, save_path=None, backup=True):
    """
    删除文件头部全部连续的字符'0'
    :param file_path: 文件路径 
    :param save_path: 保存路径（默认覆盖原文件）
    :param backup: 是否创建备份 
    """
    # 备份机制 
    if backup:
        backup_path = file_path + ".bak"
        os.rename(file_path,  backup_path)
        file_path = backup_path 
 
    # 读取二进制内容 
    with open(file_path, 'rb') as f:
        content = f.read() 
 
    # 动态检测前导0的数量 
    zero_count = 0 
    for byte in content:
        if byte == 0x30:  # ASCII字符'0'的十六进制值 
            zero_count += 1 
        else:
            break  # 遇到非0字符立即终止 
 
    # 截取有效内容 
    new_content = content[zero_count:]
 
    # 保存处理后的文件 
    save_path = save_path or file_path.replace(".bak",  "")
    with open(save_path, 'wb') as f:
        f.write(new_content) 
 
    print(f"已删除头部连续{zero_count}个0")
 
if __name__ == "__main__":
    # 单文件处理示例 
    remove_leading_zeros("1476061291/1476061291-1-30280.m4s")
    remove_leading_zeros("1476061291/1476061291-1-100050.m4s")