当前位置：首页 > news >正文

php短视频系统，视频静音的一种检测方案

news 2026/3/26 22:05:11

利用AudioSegment库抽出音轨，一定时间段间隔采样音频的dBFS，如果小于阈值（一般认为小于-50为静音），当然还存在负无穷的现象需要判断。

defaudio_silence_check_service(video_location):download_video_to_local(location=video_location,video_filename=video_filename)extract_audio_result=extract_audio_from_video(video_filename,audio_filename)is_exist_silence=Falsesilence_desc='' silence_detect_result=[]ifextract_audio_result:silence_detect_result=silence_detect(audio_filename)forsilence_chunkinsilence_detect_result.get('silence_result'):ifint(silence_chunk[1])-int(silence_chunk[0])>int(int(silence_detect_result.get('audio_duration'))/3):silence_desc+=f'{silence_chunk[0]}~{silence_chunk[1]},'ifsilence_desc:silence_desc+='ms存在静音' is_exist_silence=Trueelse:is_exist_silence=Truesilence_desc=f'{qipuid}未获取到音轨'logger_error(silence_desc)returnis_exist_silence,silence_desc,silence_detect_resultdefsilence_detect(audio_file,silence_threshold=-50,chunk_size=10):sound=AudioSegment.from_file(audio_file,format="wav")assert chunk_size>0silence_chunks=list()silence_chunks_start_ms=-1sound_duration=len(sound)forcurrent_msinrange(0,sound_duration,chunk_size):current_ms_chunks_dBFS=sound[current_ms:current_ms+chunk_size].dBFSifcurrent_ms_chunks_dBFS<silence_thresholdorcurrent_ms_chunks_dBFS==-inf:ifsilence_chunks_start_ms==-1:silence_chunks_start_ms=current_mselse:ifcurrent_ms<=sound_duration<=current_ms+chunk_size:silence_chunks.append([silence_chunks_start_ms,sound_duration])silence_chunks_start_ms=-1else:ifsilence_chunks_start_ms!=-1:silence_chunks.append([silence_chunks_start_ms,current_ms])silence_chunks_start_ms=-1return{'audio_duration':sound_duration,'silence_result':silence_chunks}defdownload_video_to_local(location,video_filename):res=get(location)withopen(video_filename,r'wb')asf:f.write(res.content)