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• ffmpeg conversion from Flac to Ogg produces corrupted files

  8 avril 2021, par experimental

  i transcoded flac files to ogg using this command

  


  ffmpeg -i input.flac -c:a libvorbis -b:a 500k  output.ogg


  


  yes i use 500k to keep the highest quality possible, some of the files are ok, but some of them can not be played - Unsupported format or corrupted file says the foobar - also my icecast streamer cant read it. So there is something wrong with the files.

  


  I believed it was due to the high bitrate so I tried

  


  ffmpeg -i input.flac -c:a libvorbis -b:a 320k  output.ogg


  


  the same happened, some files were ok, some were not playable.
so I tried again with default using this command

  


  ffmpeg -i input.flac -c:a libvorbis output.ogg


  


  same thing. some files were ok, some were corrupted and not playable.

  


  i have no clue why.

  


  both flac and ogg are in the same family, what happened during the transcoding that it became a corrupted file ?

  


  the spectral analysis does not show anything wrong - here it the ogg https://prnt.sc/115zdjl, here is the original flac https://prnt.sc/115zegw

  


  i am really interested what is going on and how to make it work ?

  


  can anyone explain ?

  


  here is complete log

  


      C:\Users\lukas.kotatko>ffmpeg -i "\\192.168.0.128\lukas\online radio resources\Atma FM playlists\channel 1\flac lossless\Tuu\One Thousand Years\02 One Thousand Years.flac" -c:a libvorbis -b:a 500k "\\192.168.0.128\lukas\online radio resources\Atma FM playlists\channel 1\flac lossless\Tuu\One Thousand Years\02 One Thousand Years [500k test].ogg"
ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 10.2.1 (GCC) 20200726
  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-libsrt --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-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libgsm --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, flac, from '\\192.168.0.128\lukas\online radio resources\Atma FM playlists\channel 1\flac lossless\Tuu\One Thousand Years\02 One Thousand Years.flac':
  Metadata:
    GENRE           : Tribal / Ambient
    ORGANIZATION    : Waveform Records
    ISRC            : 01101-2
    COMMENT         : US reissue featuring the six original tracks plus two taken from the Invocation album.
    MUSICBRAINZ_RELEASEGROUPID: 737d0518-3dc2-36b3-9419-282c0ade0e50
    ORIGINALDATE    : 1993
    ORIGINALYEAR    : 1993
    RELEASETYPE     : album
    MUSICBRAINZ_ALBUMID: f6339129-f662-43a1-93df-2f20540f73cc
    ALBUM           : One Thousand Years
    BARCODE         : 789060110125
    MUSICBRAINZ_ALBUMARTISTID: e05a42e7-60a3-4d2d-983c-51dc4eb67cad
    album_artist    : Tuu
    ALBUMARTISTSORT : Tuu
    ASIN            : B00005B9TT
    SCRIPT          : Latn
    RELEASESTATUS   : official
    LABEL           : Waveform Records
    CATALOGNUMBER   : 01101-2
    RELEASECOUNTRY  : US
    DATE            : 2001-05-08
    TOTALDISCS      : 1
    disc            : 1
    TOTALTRACKS     : 8
    MEDIA           : CD
    MUSICBRAINZ_TRACKID: aef9824d-e4a6-4ae6-aebe-50a83dd14f71
    TITLE           : One Thousand Years
    MUSICBRAINZ_ARTISTID: e05a42e7-60a3-4d2d-983c-51dc4eb67cad
    ARTIST          : Tuu
    ARTISTSORT      : Tuu
    ARTISTS         : Tuu
    MUSICBRAINZ_RELEASETRACKID: 621c9da6-a85d-3f8b-b485-5e6f74a60cd0
    track           : 2
    TRACKTOTAL      : 8
    DISCTOTAL       : 1
  Duration: 00:08:03.67, start: 0.000000, bitrate: 792 kb/s
    Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
    Stream #0:1: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 600x600 [SAR 1:1 DAR 1:1], 90k tbr, 90k tbn, 90k tbc (attached pic)
    Metadata:
      comment         : Cover (front)
Stream mapping:
  Stream #0:1 -> #0:0 (mjpeg (native) -> theora (libtheora))
  Stream #0:0 -> #0:1 (flac (native) -> vorbis (libvorbis))
Press [q] to stop, [?] for help
[swscaler @ 0000015307581a00] deprecated pixel format used, make sure you did set range correctly
[ogg @ 00000153073f1680] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, ogg, to '\\192.168.0.128\lukas\online radio resources\Atma FM playlists\channel 1\flac lossless\Tuu\One Thousand Years\02 One Thousand Years [500k test].ogg':
  Metadata:
    GENRE           : Tribal / Ambient
    ORGANIZATION    : Waveform Records
    ISRC            : 01101-2
    COMMENT         : US reissue featuring the six original tracks plus two taken from the Invocation album.
    MUSICBRAINZ_RELEASEGROUPID: 737d0518-3dc2-36b3-9419-282c0ade0e50
    ORIGINALDATE    : 1993
    ORIGINALYEAR    : 1993
    RELEASETYPE     : album
    MUSICBRAINZ_ALBUMID: f6339129-f662-43a1-93df-2f20540f73cc
    ALBUM           : One Thousand Years
    BARCODE         : 789060110125
    MUSICBRAINZ_ALBUMARTISTID: e05a42e7-60a3-4d2d-983c-51dc4eb67cad
    album_artist    : Tuu
    ALBUMARTISTSORT : Tuu
    ASIN            : B00005B9TT
    SCRIPT          : Latn
    RELEASESTATUS   : official
    LABEL           : Waveform Records
    CATALOGNUMBER   : 01101-2
    RELEASECOUNTRY  : US
    DATE            : 2001-05-08
    TOTALDISCS      : 1
    disc            : 1
    TOTALTRACKS     : 8
    MEDIA           : CD
    MUSICBRAINZ_TRACKID: aef9824d-e4a6-4ae6-aebe-50a83dd14f71
    TITLE           : One Thousand Years
    MUSICBRAINZ_ARTISTID: e05a42e7-60a3-4d2d-983c-51dc4eb67cad
    ARTIST          : Tuu
    ARTISTSORT      : Tuu
    ARTISTS         : Tuu
    MUSICBRAINZ_RELEASETRACKID: 621c9da6-a85d-3f8b-b485-5e6f74a60cd0
    track           : 2
    TRACKTOTAL      : 8
    DISCTOTAL       : 1
    encoder         : Lavf58.45.100
    Stream #0:0: Video: theora (libtheora), yuv420p(progressive), 600x600 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc (attached pic)
    Metadata:
      DESCRIPTION     : Cover (front)
      encoder         : Lavc58.91.100 libtheora
      GENRE           : Tribal / Ambient
      ORGANIZATION    : Waveform Records
      ISRC            : 01101-2
      MUSICBRAINZ_RELEASEGROUPID: 737d0518-3dc2-36b3-9419-282c0ade0e50
      ORIGINALDATE    : 1993
      ORIGINALYEAR    : 1993
      RELEASETYPE     : album
      MUSICBRAINZ_ALBUMID: f6339129-f662-43a1-93df-2f20540f73cc
      ALBUM           : One Thousand Years
      BARCODE         : 789060110125
      MUSICBRAINZ_ALBUMARTISTID: e05a42e7-60a3-4d2d-983c-51dc4eb67cad
      ALBUMARTIST     : Tuu
      ALBUMARTISTSORT : Tuu
      ASIN            : B00005B9TT
      SCRIPT          : Latn
      RELEASESTATUS   : official
      LABEL           : Waveform Records
      CATALOGNUMBER   : 01101-2
      RELEASECOUNTRY  : US
      DATE            : 2001-05-08
      TOTALDISCS      : 1
      DISCNUMBER      : 1
      TOTALTRACKS     : 8
      MEDIA           : CD
      MUSICBRAINZ_TRACKID: aef9824d-e4a6-4ae6-aebe-50a83dd14f71
      TITLE           : One Thousand Years
      MUSICBRAINZ_ARTISTID: e05a42e7-60a3-4d2d-983c-51dc4eb67cad
      ARTIST          : Tuu
      ARTISTSORT      : Tuu
      ARTISTS         : Tuu
      MUSICBRAINZ_RELEASETRACKID: 621c9da6-a85d-3f8b-b485-5e6f74a60cd0
      TRACKNUMBER     : 2
      TRACKTOTAL      : 8
      DISCTOTAL       : 1
    Stream #0:1: Audio: vorbis (libvorbis), 44100 Hz, stereo, fltp (16 bit), 500 kb/s
    Metadata:
      encoder         : Lavc58.91.100 libvorbis
      GENRE           : Tribal / Ambient
      ORGANIZATION    : Waveform Records
      ISRC            : 01101-2
      DESCRIPTION     : US reissue featuring the six original tracks plus two taken from the Invocation album.
      MUSICBRAINZ_RELEASEGROUPID: 737d0518-3dc2-36b3-9419-282c0ade0e50
      ORIGINALDATE    : 1993
      ORIGINALYEAR    : 1993
      RELEASETYPE     : album
      MUSICBRAINZ_ALBUMID: f6339129-f662-43a1-93df-2f20540f73cc
      ALBUM           : One Thousand Years
      BARCODE         : 789060110125
      MUSICBRAINZ_ALBUMARTISTID: e05a42e7-60a3-4d2d-983c-51dc4eb67cad
      ALBUMARTIST     : Tuu
      ALBUMARTISTSORT : Tuu
      ASIN            : B00005B9TT
      SCRIPT          : Latn
      RELEASESTATUS   : official
      LABEL           : Waveform Records
      CATALOGNUMBER   : 01101-2
      RELEASECOUNTRY  : US
      DATE            : 2001-05-08
      TOTALDISCS      : 1
      DISCNUMBER      : 1
      TOTALTRACKS     : 8
      MEDIA           : CD
      MUSICBRAINZ_TRACKID: aef9824d-e4a6-4ae6-aebe-50a83dd14f71
      TITLE           : One Thousand Years
      MUSICBRAINZ_ARTISTID: e05a42e7-60a3-4d2d-983c-51dc4eb67cad
      ARTIST          : Tuu
      ARTISTSORT      : Tuu
      ARTISTS         : Tuu
      MUSICBRAINZ_RELEASETRACKID: 621c9da6-a85d-3f8b-b485-5e6f74a60cd0
      TRACKNUMBER     : 2
      TRACKTOTAL      : 8
      DISCTOTAL       : 1
frame=    1 fps=0.1 q=-0.0 Lsize=   25860kB time=00:08:03.66 bitrate= 438.0kbits/s speed=44.6x
video:8kB audio:25721kB subtitle:0kB other streams:0kB global headers:7kB muxing overhead: 0.511663%


  


• using node-fluent-ffmpeg to transcode with ffmpeg on windows not working

  25 juillet 2015, par jansmolders86

  I’m trying to use the module node-fluent-ffmpeg (https://github.com/schaermu/node-fluent-ffmpeg) to transcode and stream a videofile. Since I’m on a Windows machine, I first downloaded FFMpeg from the official site (http://ffmpeg.zeranoe.com/builds/). Then I extracted the files in the folder C :/FFmpeg and added the path to the system path (to the bin folder to be precise). I checked if FFmpeg worked by typing in the command prompt : ffmpeg -version. And it gave a successful response.

  After that I went ahead and copied/altered the following code from the module (https://github.com/schaermu/node-fluent-ffmpeg/blob/master/examples/express-stream.js) :

  app.get('/video/:filename', function(req, res) {
  
  res.contentType('avi');
  
  console.log('Setting up stream')
  
  
  
  var stream = 'c:/temp/' + req.params.filename
  
  var proc = new ffmpeg({ source: configfileResults.moviepath + req.params.filename, nolog: true, timeout: 120, })
  
      .usingPreset('divx')
  
      .withAspect('4:3')
  
      .withSize('640x480')
  
      .writeToStream(res, function(retcode, error){
  
          if (!error){
  
              console.log('file has been converted succesfully',retcode);
  
          }else{
  
              console.log('file conversion error',error);
  
          }
  
      });
  
  });

  I’ve properly setup the client with flowplayer and tried to get it running but
  nothing happens. I checked the console and it said :

  file conversion error timeout

  After that I increased the timeout but somehow, It only starts when I reload the page. But of course immediately stops because of the page reload. Do I need to make a separate node server just for the transcoding of files ? Or is there some sort of event I need to trigger ?

  I’m probably missing something simple but I can’t seem to get it to work.
  Hopefully someone can point out what I’ve missed.

  Thanks

• FFmpeg RTP_Mpegts over RTP protocol

  7 mars 2020, par Nicolò

  I’m tryin to implement a client/server application based on FFmpeg. Unfortunately RTP_MPEGTS isn’t documented in the official FFmpeg Documentation - Formats.
  Anyway i found inspiration from this old thread.

  Server Side

  (1) Capture mic audio as input. (2)Encode it as pcm 8khz mono and (3) send it locally as RTP_MPEGTS format over rtp protocol.

  ffmpeg -f avfoundation -i none:2  -ar 8000 -acodec pcm_u8 -ac 1 -f rtp_mpegts rtp://127.0.0.1:41954

  • This works, but on initiation it alerts "[mpegts @ 0x7fda13024600] frame size not set"

  Client Side (on the same machine)

  (1) Receive rtp audio stream input (2) write it in a file or playback.

  ffmpeg -i rtp://127.0.0.1:41954 -vcodec copy -y "output.wav"

  • I’m using -vcodec copy because i’ve already verified it in another rtp stream in which -acodec copy didn’t work.

  • This stuck and while closing with Ctrl+C shortcut it prints :

    Input #0, rtp, from 'rtp://127.0.0.1:41954':
    
    Duration: N/A, start: 8.956122, bitrate: N/A
    
    Program 1 
    
    Metadata:
    
      service_name    : Service01
    
      service_provider: FFmpeg
    
    Stream #0:0: Data: bin_data ([6][0][0][0] / 0x0006)
    
    Output #0, wav, to 'output.wav':
    
    Output file #0 does not contain any stream

  ---

  1. I don’t understand if the client didn’t receive any stream, or it cannot write rtp packets into "output.wav" file. (Client or server problem ?)

  2. In the old thread is explained a workaround. On server could run 2 ffmpeg instance :
     One produces "tmp.ts" file due to mpegts, and the other takes "tmp.ts" as input and streams it over rtp. Is it possibile ?

  3. Is there any better way to do implement this client/server with the lowest latency possible ?

  ---

  Thanks for any help provided.