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• Google Speech API "Sample rate in request does not match FLAC header"

  13 février 2017, par kjdion84

  I’m trying to convert an mp4 video clip into a FLAC audio file and then have google speech spit out the words from the video so that I can detect if specific words were said.

  I have everything working except that I am getting an error from the Speech API :

  {
  
    "error": {
  
      "code": 400,
  
      "message": "Sample rate in request does not match FLAC header.",
  
      "status": "INVALID_ARGUMENT"
  
    }
  
  }

  I am using FFMPEG in order to convert the mp4 into a FLAC file. I am specifying that the FLAC file be 16 bits in the command, but when I right click on the FLAC file Windows is telling me it is 302kbps.

  Here is my PHP code :

  // convert mp4 video to 16 bit flac audio file
  
  $cmd = 'C:/wamp/www/ffmpeg/bin/ffmpeg.exe -i C:/wamp/www/test.mp4 -c:a flac -sample_fmt s16 C:/wamp/www/test.flac';
  
  exec($cmd, $output);
  
  
  
  // convert flac to text so we can detect if certain words were said
  
  $data = array(
  
      "config" => array(
  
          "encoding" => "FLAC",
  
          "sampleRate" => 16000,
  
          "languageCode" => "en-US"
  
      ),
  
      "audio" => array(
  
          "content" => base64_encode(file_get_contents("test.flac")),
  
      )
  
  );
  
  
  
  $json_data = json_encode($data);
  
  
  
  $ch = curl_init();
  
  curl_setopt($ch, CURLOPT_URL, 'https://speech.googleapis.com/v1beta1/speech:syncrecognize?key=MY_API_KEY');
  
  curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json"));
  
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  
  curl_setopt($ch, CURLOPT_POST, true);
  
  curl_setopt($ch, CURLOPT_POSTFIELDS, $json_data);
  
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
  
  
  
  $result = curl_exec($ch);

• FFMPEG "buffer queue overflow, dropping" with trim and atrim filters

  13 juin 2020, par Prasanna Mahendiran

  In FFMPEG I am actually trimming and concating a 24 FPS video. When I apply a complex filter

  



  ffmpeg -i sample.mp4 -filter_complex \
  "[0:v]setpts = PTS-STARTPTS[bv];
  [bv]split=6[v0][v1][v2][v3][v4][v5];
  [v0]trim=start_frame=1:end_frame=142,loop=1:1:1,setpts=N/FRAME_RATE/TB[0v];
  [v1]trim=start_frame=846:end_frame=878,loop=1:1:1,setpts=N/FRAME_RATE/TB[1v];
  [v2]trim=start_frame=57:end_frame=114,loop=1:1:1,setpts=N/FRAME_RATE/TB[2v];
  [v3]trim=start_frame=865:end_frame=885,loop=1:1:1,setpts=N/FRAME_RATE/TB[3v];
  [v4]trim=start_frame=70:end_frame=155,loop=1:1:1,setpts=N/FRAME_RATE/TB[4v];
  [v5]trim=start_frame=155:end_frame=909,loop=1:1:1,setpts=N/FRAME_RATE/TB[5v];
  [0:a]asplit=6[a0][a1][a2][a3][a4][a5];
  [a0]atrim=0.041666666666666664:5.917,asetpts=N/SR/TB[0a];
  [a1]atrim=35.256:36.603,asetpts=N/SR/TB[1a];
  [a2]atrim=2.379:4.767,asetpts=N/SR/TB[2a];
  [a3]atrim=36.024:36.859,asetpts=N/SR/TB[3a];
  [a4]atrim=2.93:6.438172,asetpts=N/SR/TB[4a];
  [a5]atrim=6.438172:37.895,asetpts=N/SR/TB[5a];
  [0v][0a][1v][1a][2v][2a][3v][3a][4v][4a][5v][5a]concat=n=6:v=1:a=1[vv][aa]"\
  -map "[vv]" -map "[aa]" output.mp4


  



  I am getting "buffer queue overflow, dropping" error. The resultant video and audio is still and not working properly.

  



  ffmpeg version 3.2-1~16.04.york1 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.4.1 (Ubuntu 5.4.1-3ubuntu1~ubuntu16.04.1york0) 20161019
  configuration: --prefix=/usr --extra-version='1~16.04.york1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-libtesseract --disable-stripping --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librubberband --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-opengl --enable-sdl2 --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-openal --enable-frei0r --enable-libopencv --enable-libx264 --enable-chromaprint --enable-shared
  libavutil      55. 34.100 / 55. 34.100
  libavcodec     57. 64.100 / 57. 64.100
  libavformat    57. 56.100 / 57. 56.100
  libavdevice    57.  1.100 / 57.  1.100
  libavfilter     6. 65.100 /  6. 65.100
  libavresample   3.  1.  0 /  3.  1.  0
  libswscale      4.  2.100 /  4.  2.100
  libswresample   2.  3.100 /  2.  3.100
  libpostproc    54.  1.100 / 54.  1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    track           : 0
    artist          : 
    album           : 
    date            : 0
    genre           : 
    lyrics          : 
    title           : 
    encoder         : Lavf56.36.100
  Duration: 00:00:37.90, start: 0.000000, bitrate: 951 kb/s
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 820 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 126 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
File 'output.mp4' already exists. Overwrite ? [y/N] y
[libx264 @ 0x55650097a540] using SAR=1/1
[libx264 @ 0x55650097a540] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x55650097a540] profile High, level 3.0
[libx264 @ 0x55650097a540] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=24 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    track           : 0
    artist          : 
    album           : 
    date            : 0
    genre           : 
    lyrics          : 
    title           : 
    encoder         : Lavf57.56.100
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 24 fps, 12288 tbn, 24 tbc (default)
    Metadata:
      encoder         : Lavc57.64.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      encoder         : Lavc57.64.100 aac
Stream mapping:
  Stream #0:0 (h264) -> setpts
  Stream #0:1 (aac) -> asplit
  concat:out:v0 -> Stream #0:0 (libx264)
  concat:out:a0 -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
[Parsed_concat_33 @ 0x55650097b420] Buffer queue overflow, dropping. 471.5kbits/s speed=4.94x    
    Last message repeated 201 times
[Parsed_concat_33 @ 0x55650097b420] Buffer queue overflow, dropping. 522.9kbits/s speed=3.89x    
    Last message repeated 1266 times
[Parsed_concat_33 @ 0x55650097b420] Buffer queue overflow, dropping. 557.0kbits/s speed=3.28x    
    Last message repeated 48 times
[output stream 0:1 @ 0x556500947e20] 100 buffers queued in output stream 0:1, something may be wrong.
[Parsed_concat_33 @ 0x55650097b420] Buffer queue overflow, dropping. 718.6kbits/s speed=3.46x    
    Last message repeated 19 times
[output stream 0:0 @ 0x5565009785c0] 100 buffers queued in output stream 0:0, something may be wrong.
frame= 1091 fps=117 q=-1.0 Lsize=    2795kB time=00:00:45.51 bitrate= 503.1kbits/s dup=475 drop=0 speed=4.88x    
video:2455kB audio:316kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.861779%
[libx264 @ 0x55650097a540] frame I:8     Avg QP:19.26  size: 24207
[libx264 @ 0x55650097a540] frame P:409   Avg QP:21.33  size:  4108
[libx264 @ 0x55650097a540] frame B:674   Avg QP:27.46  size:   949
[libx264 @ 0x55650097a540] consecutive B-frames: 10.3% 13.9% 24.5% 51.3%
[libx264 @ 0x55650097a540] mb I  I16..4:  9.9% 57.0% 33.1%
[libx264 @ 0x55650097a540] mb P  I16..4:  3.6%  7.6%  2.9%  P16..4: 33.0% 10.6%  3.0%  0.0%  0.0%    skip:39.2%
[libx264 @ 0x55650097a540] mb B  I16..4:  0.4%  0.8%  0.4%  B16..8: 24.5%  2.6%  0.2%  direct: 0.5%  skip:70.5%  L0:55.5% L1:41.8% BI: 2.7%
[libx264 @ 0x55650097a540] 8x8 transform intra:53.8% inter:66.7%
[libx264 @ 0x55650097a540] coded y,uvDC,uvAC intra: 44.6% 50.0% 14.8% inter: 6.2% 7.7% 0.2%
[libx264 @ 0x55650097a540] i16 v,h,dc,p: 22% 28% 17% 33%
[libx264 @ 0x55650097a540] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 23% 28%  3%  4%  3% 11%  3%  5%
[libx264 @ 0x55650097a540] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 26% 16%  2%  5%  3% 16%  3%  3%
[libx264 @ 0x55650097a540] i8c dc,h,v,p: 60% 22% 13%  6%
[libx264 @ 0x55650097a540] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x55650097a540] ref P L0: 72.6%  8.4% 15.1%  3.9%
[libx264 @ 0x55650097a540] ref B L0: 88.5% 10.7%  0.8%
[libx264 @ 0x55650097a540] ref B L1: 93.3%  6.7%
[libx264 @ 0x55650097a540] kb/s:442.30
[aac @ 0x556500979280] Qavg: 3215.870


  



  I tried with other stackoverflow questions but none of them worked. Also I think it is partially because the trim timings are mixed. That is start time can be anywhere between 0-end. When I make it strictly increasing it is working fine.

  


• Filter "showpalette" of FFmpeg always returns the default palette

  19 mai 2017, par Vej

  I want to extract palette of GIF files with FFmpeg, and learned from the document that filter "showpalette" can do that. But FFmpeg always returns the same default palette instead of the custom palette.

  

  FFmpeg returns the same palette even for the two examples in pkh.me’s Post. Here’s my code :

  ffmpeg -i bbb-trans.gif -vf "showpalette" -y a%03d.png
  
  ffmpeg -i bbb-nodither.gif -vf "showpalette" -y b%03d.png

  Did I use the wrong command ? Or it’s a just bug of FFmpeg.