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• lavf/hls : support probesize/max_analyze_duration when open sub-demuxer

  2 novembre 2019, par Jun Zhao

  lavf/hls : support probesize/max_analyze_duration when open sub-demuxer
  Add probesize/max_analyze_duration support when open the sub-demuxer,
  
  it's will be used to minimizing the initial delay.
  Signed-off-by : Jun Zhao <barryjzhao@tencent.com>
  

  • [DH] libavformat/hls.c

• FFmpeg giving me failed to open segment error. Trying to parse .wav file into 30-second files

  7 novembre 2019, par Requiem_7

  Here is the command I used and the output when I try and parse the .wav file into 30-second clips :

  C:\Users\hmkur>ffmpeg -i C:\Users\hmkur\Desktop\Python\Transcribing_Audio\source\valve.wav -f segment -segment_time 30 -c copy parts/out%09d.wav
  
  ffmpeg version git-2019-11-05-c54268c Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9.2.1 (GCC) 20191010
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  
    libavutil      56. 35.101 / 56. 35.101
  
    libavcodec     58. 60.100 / 58. 60.100
  
    libavformat    58. 34.101 / 58. 34.101
  
    libavdevice    58.  9.100 / 58.  9.100
  
    libavfilter     7. 66.100 /  7. 66.100
  
    libswscale      5.  6.100 /  5.  6.100
  
    libswresample   3.  6.100 /  3.  6.100
  
    libpostproc    55.  6.100 / 55.  6.100
  
  [wav @ 0000023133098a00] Discarding ID3 tags because more suitable tags were found.
  
  Guessed Channel Layout for Input Stream #0.0 : stereo
  
  Input #0, wav, from 'C:\Users\hmkur\Desktop\Python\Transcribing_Audio\source\valve.wav':
  
    Metadata:
  
      title           : valve
  
      encoder         : Lavf58.20.100 (libsndfile-1.0.24)
  
    Duration: 00:06:47.20, bitrate: 1411 kb/s
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
  
  [segment @ 00000231334d18c0] Opening 'parts/out000000000.wav' for writing
  
  [segment @ 00000231334d18c0] Failed to open segment 'parts/out000000000.wav'
  
  Could not write header for output file #0 (incorrect codec parameters ?): No such file or directory
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
      Last message repeated 1 times

• ffmpeg libfdk-aac open coder error and show The encoder timebase is not set

  28 octobre 2019, par RodSteward

  I try to encode some pcm data,and I compile ffmpeg for myself with libfdk-aac,but When I use a aac encoder,It shows timebase is not set,but aac data seems not need a timebase,and even I set the timebase,it shows the same error again

  here is the Initializationcode :

      AVCodec *pCodec;
  
      AVCodecContext *pCodecCtx = NULL;
  
      int i, ret, got_output;
  
      FILE *fp_in;
  
      FILE *fp_out;
  
  
  
      AVFrame *pFrame;
  
      uint8_t* frame_buf;
  
      int size = 0;
  
  
  
      AVPacket pkt;
  
      int y_size;
  
      int framecnt = 0;
  
  
  
      char filename_in[] = "tdjm.pcm";
  
  
  
      AVCodecID codec_id = AV_CODEC_ID_AAC;
  
      char filename_out[] = "tdjm.aac";
  
  
  
      int framenum = 1000;
  
  
  
      avcodec_register_all();
  
  
  
      pCodec = avcodec_find_encoder_by_name("libfdk_aac");
  
      if (!pCodec) {
  
          printf("Codec not found\n");
  
          return -1;
  
      }
  
      pCodecCtx = avcodec_alloc_context3(pCodec);
  
      if (!pCodecCtx) {
  
          printf("Could not allocate video codec context\n");
  
          return -1;
  
      }
  
  
  
      //pCodecCtx->codec_id = codec_id;
  
      pCodecCtx->codec_type = AVMEDIA_TYPE_AUDIO;
  
      pCodecCtx->sample_fmt = AV_SAMPLE_FMT_S16;
  
      pCodecCtx->sample_rate = 44100;
  
      pCodecCtx->channel_layout = AV_CH_LAYOUT_STEREO;
  
      pCodecCtx->channels = av_get_channel_layout_nb_channels(pCodecCtx->channel_layout);
  
      pCodecCtx->bit_rate = 64000;
  
      pCodecCtx->time_base = AVRational{1,10};
  
  
  
      if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0) {
  
          printf("Could not open codec\n");
  
          return -1;
  
      }