explicit AudioPCMExtractor(QObject *parent = nullptr); ~AudioPCMExtractor(); void doExtract(int chan, int rate, QString src, QString dst); void stop(); signals: void procgress(int p); protected: void run() override; private: void setup(); int setupOut(); void process(); void relea...
int extract_audio(const char *output_filename, const char *input_filename, AVSampleFormat sample_fmt, int sample_rate, uint64_t channel_layout, uint64_t bitrate) { AVFormatContext *inFmtCtx = nullptr; AVFormatContext *outFmtCtx = nullptr; AVCodecContext *aDecCtx = nullptr; AVCodecContext *aE...
output_file='audio.wav'# 创建一个`ffmpeg.output()`对象,指定输出文件路径和参数output=ffmpeg.output(input,output_file,output_params)# 运行音频提取操作ffmpeg.run(output) 1. 2. 3. 4. 5. 6. 7. 上述代码中,我们使用ffmpeg.run()函数运行音频提取操作,并将提取的音频保存到output_file指定的路径。
('video.mp4');// Set an audio format / 设置音频格式$audio_format=newFFMpeg\Format\Audio\Mp3();// Extract the audio into a new file as mp3 / 保存成 mp3 文件$video->save($audio_format,'audio.mp3');// Set the audio file / 打开 mp3 文件$audio=$ffmpeg->open('audio.mp3');// ...
extract_extradata_check(st)) break; if (st->first_dts == AV_NOPTS_VALUE && !(ic->iformat->flags & AVFMT_NOTIMESTAMPS) && st->codec_info_nb_frames < ((st->disposition & AV_DISPOSITION_ATTACHED_PIC) ? 1 : ic->max_ts_probe) && ...
..C acrusher A->A Reduce audio bit resolution. TS. adeclick A->A Remove impulsive noise from input audio. TS. adeclip A->A Remove clipping from input audio. T.. adelay A->A Delay one or more audio channels. TSC adenorm A->A Remedy denormals by adding extremely low-level noise...
You can also extract each channel of an input to specific outputs; the following command extracts two channels of the INPUT audio stream (file 0, stream 0) to the respective OUTPUT_CH0 and OUTPUT_CH1 outputs: ffmpeg -i INPUT -map_channel 0.0.0 OUTPUT_CH0 -map_channel 0.0.1 OUTPUT_CH...
=nil{fmt.Printf("Play the output video file with the command:\nffplay -f rawvideo -pix_fmt %s -video_size %dx%d %s\n",libavutil.AvGetPixFmtName(pix_fmt),width,height,video_dst_filename)}ifaudio_stream!=nil{sfmt:=audio_dec_ctx.SampleFmtn_channels:=audio_dec_ctx.Channelsvarfmt0 ...
voidAudioPCMExtractor::doExtract(intchan,intrate,QString src,QString dst){if(queued){return;}queued=true;src_filePath=src;dst_filePath=dst;outChannel=chan;outSampleRate=rate;setup();wait_cond_.wakeAll();}voidAudioPCMExtractor::setup(){intret=0;charerrors[1024]={0};//打开媒体,并读取头部...
ffmpeg是一个非常强大的工具,它可以转换任何格式的媒体文件,并且还可以用自己的AudioFilter以及VideoFilter进行处理和编辑。有了它,我们就可以对媒体文件做很多我们想做的事情了。 二、命令行参数 1. 通用参数 -f fmt : 指定格式 -i filename:指定输入文件名 ...