php短视频系统，视频静音的一种检测方案
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。
def audio_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 = []if extract_audio_result:silence_detect_result = silence_detect(audio_filename)for silence_chunk in silence_detect_result.get('silence_result'):if int(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]},'if silence_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)return is_exist_silence, silence_desc, silence_detect_resultdef silence_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)for current_ms in range(0, sound_duration, chunk_size):current_ms_chunks_dBFS = sound[current_ms: current_ms + chunk_size].dBFSif current_ms_chunks_dBFS < silence_threshold or current_ms_chunks_dBFS == -inf:if silence_chunks_start_ms == -1:silence_chunks_start_ms = current_mselse:if current_ms <= sound_duration <= current_ms + chunk_size:silence_chunks.append([silence_chunks_start_ms, sound_duration])silence_chunks_start_ms = -1else:if silence_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}def download_video_to_local(location, video_filename):res = get(location)with open(video_filename, r'wb') as f:f.write(res.content)
以上就是php短视频系统，视频静音的一种检测方案， 更多内容欢迎关注之后的文章