用ffmpeg命令从视频文件中提取音频
命令：ffmpeg -i D:\AI\bili_data\test.mp4 -vn -y -acodec copy D:\AI\bili_data\output.aac
# 从视频中提取音频 def video_to_audio(video_file,audio_file): # ffmpeg命令工具 在D:/FFmpeg/bin目录下 try: # ffmpeg = r\'D:/FFmpeg/bin/ffmpeg -i %s -vn -y -acodec copy %s\' %(video_file,audio_file) # ffmpeg = r\'D:/FFmpeg/bin/ffmpeg -i D:\AI\bili_data\test.mp4 -vn -y -acodec copy D:\AI\bili_data\output.aac\' # 8000采样率 ffmpeg = r\'D:/FFmpeg/bin/ffmpeg.exe -i %s -f wav -vn -ar 8000 -ac 1 -y %s\' % (video_file, audio_file) # print(ffmpeg) os.system(ffmpeg) # p = subprocess.Popen(ffmpeg, shell=False) # p.wait(5) print(\'提取完成\') except Exception as ex: print(\'提取音频发生异常\', ex) # 从视频中截取图片，每秒钟一个图片 def cut_image_from_video(video_file,imagedir): try: # strls = os.path.split(video_file) # filename = strls[1].replace(\'.mp4\',\'\') # # imagedir = os.path.join(strls[0],filename) if not os.path.exists(imagedir): os.mkdir(imagedir) filename = os.path.join(imagedir, \'test_frame_%03d.jpg\') ffmpeg = r\'D:/FFmpeg/bin/ffmpeg -i %s -r 1 -q:v 2 -f image2 -y %s\' % (video_file, filename) # print(ffmpeg) os.system(ffmpeg) # p = subprocess.Popen(ffmpeg, shell=False) # p.wait(5) print(\'提取完成\') except Exception as ex: print(\'提取音频发生异常\', ex) # 截取视频片段 def cutVideo(video_file,save_name): # file_time = ffmpeg.probe(file_name)[\'format\'][\'duration\'] # 视频总时长 秒 start_time=\'00:02:20\' # 开始时间 length =\'00:02:00\' # 截取多长时间 2分钟 #length = \'120\' #秒 ffmpeg = r\'D:/FFmpeg/bin/ffmpeg.exe -y -i %s -ss %s -t %s -acodec copy -vcodec copy -async 1 %s\' % (video_file, start_time,length,save_name) # subprocess.call(\'D:/FFmpeg/bin/ffmpeg.exe -y -i \' + video_file + \' -ss \' + start_time + \' -t \' + length + \' -acodec copy -vcodec copy -async 1 \' + save_name) r = subprocess.call(ffmpeg) print(r)