python-3.x - 如何将 ffmpeg 命令转换为 Python 代码

Question

我想转换命令 ffmpeg -i input.mp4 -i input.wav -c:v copy -map 0:v:0 -map 1:a:0 -c:a aac -b:a 192k output.mp4到 Python 函数。我怎样才能做到这一点？

Answer 1

这就是我在 Linux 上实现它的方式。

def ffmpeg():
    cmd = ["ffmpeg", "-i", "input.mp4", "-i",  "input.wav",  "-c:v", "copy",  "-map",  "0:v:0", "-map", "1:a:0",  "-c:a",  "aac",  "-b:a",  "192k",  "output.mp4"]
    
    ffmpeg = subprocess.Popen(cmd, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
    
    # wait until the process completes
    ffmpeg.communicate()

或者如果您需要查看输出替换为

ffmpeg = subprocess.Popen(cmd)