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import subprocess
from pathlib import Path
def convert_mp4_to_wav (
input_mp4 : str ,
ffmpeg_path : str = r " d: \ ffmpeg \ ffmpeg.exe " ,
output_path : str = None # 新增输出路径参数
) :
"""
将指定MP4文件转换为WAV格式
参数：
input_mp4 - 输入的MP4文件路径
ffmpeg_path - FFmpeg可执行文件路径
output_path - 可选输出路径（可指定完整路径或目录）
"""
input_path = Path ( input_mp4 )
# 处理输出路径逻辑
if output_path :
output_path = Path ( output_path )
if output_path . is_dir ( ) : # 如果传入的是目录
output_path = output_path / f " { input_path . stem } .wav "
output_path . parent . mkdir ( parents = True , exist_ok = True )
else :
# 默认输出到wav目录
output_dir = Path ( " wav " )
output_dir . mkdir ( exist_ok = True )
output_path = output_dir / f " { input_path . stem } .wav "
cmd = [
ffmpeg_path ,
" -i " , str ( input_path ) ,
" -acodec " , " pcm_s16le " ,
" -ac " , " 1 " ,
" -ar " , " 16000 " ,
" -y " ,
str ( output_path ) # 使用处理后的输出路径
]
try :
# 执行转换命令
subprocess . run ( cmd , check = True , capture_output = True )
print ( f " 转换成功： { input_path } -> { output_path } " )
except subprocess . CalledProcessError as e :
print ( f " 转换失败： { e . stderr . decode ( ' gbk ' ) } " )
except FileNotFoundError :
print ( f " FFmpeg未找到， ： { ffmpeg_path } " )
