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• FFMpeg incorrect execution calling two different paths in NodeJS

  17 octobre 2015, par Eli

  I’m trying to take screenshots from a movie file and my app crashes with the following error :

   $ FFMPEG_PATH=C:\\Apps\\ffmpeg\\bin\\ node .
  
   =====Convert Video Failed======
  
  { [Error: spawn c:\Apps\ffmpeg\bin\ffprobe.exe
  
  c:\Program Files (x86)\ImageMagick-6.8.3-Q16\ffprobe.exe ENOENT]
  
    code: 'ENOENT',
  
    errno: 'ENOENT',
  
    syscall: 'spawn c:\\Apps\\ffmpeg\\bin\\ffprobe.exe\r\nc:\\Program Files (x86)\\ImageMagick-6.8.3-Q16\\ffprobe.exe',
  
    path: 'c:\\Apps\\ffmpeg\\bin\\ffprobe.exe\r\nc:\\Program Files (x86)\\ImageMagick-6.8.3-Q16\\ffprobe.exe',
  
    spawnargs:
  
     [ '-show_streams',
  
       '-show_format',
  
       'j:\\some.avi' ] }
  
  stdout: undefined
  
  stderr: undefined

  As you can see I’m passing a the FFMPEG_PATH env variable because otherwise I’m getting a similar error :

  $ node .
  
   =====Convert Video Failed======
  
  { [Error: spawn c:\Apps\ffmpeg\bin\ffprobe.exe
  
  c:\Program Files (x86)\ImageMagick-6.8.3-Q16\ffprobe.exe ENOENT]
  
    code: 'ENOENT',
  
    errno: 'ENOENT',
  
    syscall: 'spawn c:\\Apps\\ffmpeg\\bin\\ffprobe.exe\r\nc:\\Program Files (x86)\\ImageMagick-6.8.3-Q16\\ffprobe.exe',
  
    path: 'c:\\Apps\\ffmpeg\\bin\\ffprobe.exe\r\nc:\\Program Files (x86)\\ImageMagick-6.8.3-Q16\\ffprobe.exe',
  
    spawnargs:
  
     [ '-show_streams',
  
       '-show_format',
  
       'j:\\some.avi' ] }
  
  stdout: undefined
  
  stderr: undefined

  In both cases you can see that the command that node/fluent-ffmpeg is using results in a double path like this : c:\\Apps\\ffmpeg\\bin\\ffprobe.exe\r\nc:\\Program Files (x86)\\ImageMagick-6.8.3-Q16\\ffprobe.exe which obviously fails.

  What causes this and how do I fix it ?

  ---

  Win 7, Node v4.1.2, ffmpeg version N-76041-g0418541

  The code I’m using :

  var ffmpeg = require('fluent-ffmpeg');
  
  // ffmpeg.setFfprobePath("c:\\Apps\\ffmpeg\\bin\\ffprobe.exe");
  
  
  
  var filename = 'j:\\some.avi';
  
  var command = ffmpeg(filename);
  
  
  
  
  
  // Code from an example
  
  command
  
    .on('filenames', function(filenames) {
  
      console.log('Will generate ' + filenames.join(', '))
  
    })
  
    .on('end', function() {
  
      console.log('Screenshots taken');
  
    })
  
    .on('error', function(err, stdout, stderr) {
  
      console.log(" =====Convert Video Failed======");
  
      console.log(err);
  
      console.log("stdout: " + stdout);
  
      console.log("stderr: " + stderr);
  
    })
  
    .screenshots({
  
      // Will take screens at 20%, 40%, 60% and 80% of the video
  
      count: 4,
  
      folder: 'd:\\projects\\pics'
  
    })

• How can I remove encode settings from mediainfo ?

  12 octobre 2020, par Aydın Tekin

  I want to know if I can remove encode settings from the mediainfo with mkvpropedit or ffmpeg ?

  


  Video hevc x265 also how do i remove for avc
İ want to remove this :

  


  cpuid=0 / frame-threads=3 / no-wpp / no-pmode / no-pme / no-psnr / no-ssim / log-level=2 / input-csp=1 / input-res=1920x1080 / interlace=0 / total-frames=0 / level-idc=0 / high-tier=1 / uhd-bd=0 / ref=2 / no-allow-non-conformance / no-repeat-headers / annexb / no-aud / no-hrd / info / hash=0 / no-temporal-layers / open-gop / min-keyint=23 / keyint=250 / gop-lookahead=0 / bframes=4 / b-adapt=0 / b-pyramid / bframe-bias=0 / rc-lookahead=15 / lookahead-slices=0 / scenecut=40 / radl=0 / no-splice / no-intra-refresh / ctu=64 / min-cu-size=8 / no-rect / no-amp / max-tu-size=32 / tu-inter-depth=1 / tu-intra-depth=1 / limit-tu=0 / rdoq-level=0 / dynamic-rd=0.00 / no-ssim-rd / signhide / no-tskip / nr-intra=0 / nr-inter=0 / no-constrained-intra / strong-intra-smoothing / max-merge=2 / limit-refs=3 / no-limit-modes / me=1 / subme=1 / merange=57 / temporal-mvp / no-hme / weightp / no-weightb / no-analyze-src-pics / deblock=0:0 / sao / no-sao-non-deblock / rd=2 / selective-sao=4 / early-skip / rskip / fast-intra / no-tskip-fast / no-cu-lossless / no-b-intra / no-splitrd-skip / rdpenalty=0 / psy-rd=2.00 / psy-rdoq=0.00 / no-rd-refine / no-lossless / cbqpoffs=0 / crqpoffs=0 / rc=crf / crf=18.0 / qcomp=0.60 / qpstep=4 / stats-write=0 / stats-read=0 / ipratio=1.40 / pbratio=1.30 / aq-mode=2 / aq-strength=1.00 / cutree / zone-count=0 / no-strict-cbr / qg-size=32 / no-rc-grain / qpmax=69 / qpmin=0 / no-const-vbv / sar=1 / overscan=0 / videoformat=5 / range=0 / colorprim=2 / transfer=2 / colormatrix=2 / chromaloc=0 / display-window=0 / cll=0,0 / min-luma=0 / max-luma=1023 / log2-max-poc-lsb=8 / vui-timing-info / vui-hrd-info / slices=1 / no-opt-qp-pps / no-opt-ref-list-length-pps / no-multi-pass-opt-rps / scenecut-bias=0.05 / no-opt-cu-delta-qp / no-aq-motion / no-hdr / no-hdr-opt / no-dhdr10-opt / no-idr-recovery-sei / analysis-reuse-level=5 / scale-factor=0 / refine-intra=0 / refine-inter=0 / refine-mv=1 / refine-ctu-distortion=0 / no-limit-sao / ctu-info=0 / no-lowpass-dct / refine-analysis-type=0 / copy-pic=1 / max-ausize-factor=1.0 / no-dynamic-refine / no-single-sei / no-hevc-aq / no-svt / no-field / qp-adaptation-range=1.00

  


• Formula to get frame display number after seek in FFmpeg

  27 septembre 2021, par ZeroDefect

  For a given AV file, I need to be able to seek to a particular video frame number in the file. Because of how decoding works, I am seeking to the nearest I-Frame before the required frame (which may or may not be the requested frame) and then decoding the frames in the GOP until I get to where I need to be. As such, I need to know my current position after seeking.

  


  Having found some posts of a similar nature on SO, I've gone away and collected a few interesting samples to see if I can get a formula to work across many different files, but I'm having a hard time. What works or 1 file may not work for another :

  


  File #1 (Podbox)

  


  Requested to seek to fame #1500. First video frame reports :

  


  AVFrame::pts = 760320
AVFrame::pkt_duration = 512

AVStream::time_base = {1,12800}
AVStream::start_time = 0
AVStream::avg_frame_rate = {25,1}


  


  File #2 (HTE54959)

  


  Requested to seek to fame #1500. First video frame reports :

  


  AVFrame::pts = 1500
AVFrame::pkt_duration = 1

AVStream::time_base = {1,25}
AVStream::start_time = 0
AVStream::avg_frame_rate = {25,1}


  


  File #3 (BuckBunny)

  


  Requested to seek to fame #1800. First video frame reports :

  


  AVFrame::pts = 1563562
AVFrame::pkt_duration = 1001

AVStream::time_base = {1,30000}
AVStream::start_time = 0
AVStream::avg_frame_rate = {30000,1001}


  


  File #4 (HouseDance)

  


  Requested to seek to fame #1800. First video frame reports :

  


  AVFrame::pts = 1800
AVFrame::pkt_duration = 1

AVStream::time_base = {1001,30000}
AVStream::start_time = 0
AVStream::avg_frame_rate = {30000,1001}


  


  For the above files, the following members are always zero :

  


  AVFrame::coded_picture_number
AVFrame::display_picture_number


  


  I have thought about merely using AVFrame::pts / AVFrame::pkt_duration, but I'm not sure that is the right way of doing things. I know for some codecs, there can be a variable frame rate (VFR) which would mean that my method is erroneous ? I assume that the AVFrame::pkt_duration could change per AVFrame ?

  


  I want to emphasize that my issue is not being able to seek. I am seeking to the correct location - I have verified that visually using timecode. My issue is programmatically identifying the frame number of the seek position

  


  Using FFmpeg v4.2.4