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• how play ogg/ape/wv/wma using ffmpeg

  25 novembre 2013, par user2361120

  I'm trying decode ogg,ape,wma,wv file formats
  I have posted the code below, but I'm having too much noise at the output

   av_init_packet(&packet);
  
          fmt_ctx = avformat_alloc_context();
  
  
  
          if ((ret = avformat_open_input(&fmt_ctx, szfile, NULL, NULL)) < 0)
  
          {
  
              LOGE("Cannot open input file\n");
  
          }
  
          if ((ret = avformat_find_stream_info(fmt_ctx, NULL)) < 0)
  
          {
  
              LOGE("Cannot find stream information\n");
  
          }
  
  
  
          /* select the audio stream */
  
          ret = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_AUDIO, -1, -1, &dec, 0);
  
          if (ret < 0)
  
          {
  
              LOGE("Cannot find a audio stream in the input file\n");
  
          }
  
  
  
          audio_stream_index = ret;
  
          dec_ctx = fmt_ctx->streams[audio_stream_index]->codec;
  
  
  
          LOGE(" ogg code %d codec id%d\n",AV_CODEC_ID_VORBIS,dec_ctx->codec_id);
  
  
  
          LOGE("avcodec_find_decoder\n");
  
  
  
  
  
          dec = avcodec_find_decoder(dec_ctx->codec_id);
  
                          if (!dec) {
  
  
  
                __android_log_print(ANDROID_LOG_INFO, "BroovPlayer", "avcodec_find_decoder failed %d Name:%s\n", dec_ctx->codec_id, dec_ctx->codec_name);
  
  
  
  
  
                          }
  
  
  
  
  
          if ((ret = avcodec_open2(dec_ctx, dec, NULL)) < 0)
  
          {
  
              LOGE("Cannot open audio decoder\n");
  
          }
  
  
  
  
  
  
  
  
  
          //dec_ctx->sample_fmt = AV_SAMPLE_FMT_S16P;
  
          LOGS("Stage 5 sample fmt %d",dec_ctx->sample_fmt);
  
          LOGE("Stage 5");
  
          LOGD("........%d", packet.size);
  
          while (1)
  
          {
  
  
  
                 if ((ret = av_read_frame(fmt_ctx, &packet)) < 0)
  
                 {
  
                     //LOGE("Stage........... %d",ret);
  
                     break;
  
                 }
  
                 if (packet.stream_index == audio_stream_index)
  
                 {
  
                         avcodec_get_frame_defaults(frame);
  
                         got_frame = 0;
  
                        // LOGE("file size=%d packet_index=%d",packet.size,packet.dts);
  
  
  
  
  
                         ret = avcodec_decode_audio4(dec_ctx, frame, &got_frame, &packet);
  
                       //  LOGE("len=%d",ret);
  
                         if (ret < 0)
  
                         {
  
                             LOGE("Error decoding audio\n");
  
                             continue;
  
                         }
  
  
  
                         if (!got_frame) {
  
                                      /* stop sending empty packets if the decoder is finished */
  
                                      if (!packet.data && dec->capabilities & CODEC_CAP_DELAY)
  
                                          //flush_complete = 1;
  
                                      continue;
  
                                  }
  
  
  
                         if (got_frame)
  
                         {
  
                             // LOGE("begin frame decode\n");
  
                              int data_size = av_samples_get_buffer_size(NULL, dec_ctx->channels,frame->nb_samples,dec_ctx->sample_fmt, 1);
  
                             // LOGE("after frame decode\n");
  
  
  
                              jbyte *bytes = (*env)->GetByteArrayElements(env, array, NULL);
  
                              memcpy(bytes, frame->data[0], data_size); //
  
                              (*env)->ReleaseByteArrayElements(env, array, bytes, 0);
  
                              (*env)->CallVoidMethod(env, obj,play, array, data_size);
  
  
  
                         }
  
                         packet.size -= ret;
  
                         packet.data += ret;
  
                         packet.pts = AV_NOPTS_VALUE;
  
  
  
  
  
                   }
  
            }
  
  
  
                 av_free_packet(&packet);
  
  
  
  
  
  
  
              when ,i am playing ogg/ape/wv audio file format .
  
  
  
  
  
  
  
            please help me to minimize the noise, as less as possible

  or if any other approach is there to decode these file formats then please let me know

  thanks

• FFmpeg using complex filter amerge doesn't play on iOS

  11 juillet 2018, par SilenceKit

  I am using 2 different FFmpeg commands to add audio to a video :
  This adds audio and replace video’s existing audio :

  ffmpeg -i "inputVideo.wmv" -i "inputAudio.mp3" -map 0:v -map 1:a -shortest -vcodec libx264 -preset ultrafast -crf 22 -pix_fmt yuv420p -r 30 "outputVideo.mp4"

  It works fine.

  The problem comes when I try to mix the new audio with the video’s existing audio :

  ffmpeg -i "inputVideo.wmv" -i "inputAudio.mp3" -filter_complex "[0:a][1:a]amerge=inputs=2[a]" -map 0:v -map "[a]" -shortest -vcodec libx264 -preset ultrafast -crf 22 -pix_fmt yuv420p -r 30 "outputVideo.mp4"

  The video plays fine everywhere but on iOS. I’ve tried adding -profile:v main -level 3.1 and -profile:v baseline -level 3.1 but no luck either.

  ffmpeg -i "inputVideo.wmv" -i "inputAudio.mp3" -filter_complex "[0:a][1:a]amerge=inputs=2[a]" -map 0:v -map "[a]" -shortest -vcodec libx264 -profile:v baseline -level 3.1 -preset ultrafast -crf 22 -pix_fmt yuv420p -r 30 "outputVideo.mp4"

  WHat do I need to do to make the output video play on iOS ?

• Using FFMPEG video convert, not play audio

  7 avril 2017, par Tarun Bhardwaj

  I am using this command its works fine, but remove audio of video file

  ffmpeg -i background.jpg -i man-1.mp4 -filter_complex [1:v]chromakey=0x3BBD1E:0.1:0.2[ckout];[0:v][ckout]overlay[out] -map [out] box3.mp4