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• Batch-file script to automatically add an mp3 track to the same mp4 video in ffmpeg [closed]

  15 janvier, par Poro

  I have several video and audio files :

  


  

  • file 01.mp3

  


  • file 01.mkv

  


  • file 02.mp3

  


  • file 02.mkv

  


  • file 03.mp3

  


  • file 03.mkv

  


  


  what should be the script for ffmpeg to take each video file and add an additional second audio track with the same name (file 01.mkv + file 01.mp3) ?

  


  it's a main question

  


  But ultimately I need to get each video (let's say it's mp4) with 3 audio streams :

  


  

  1. mixed stream from mp3 (100%) + mkv (10% volume) - by default

  


  2. stream from mp3 file (100%)

  


  3. and last stream from mkv (100% volume)

  


  


  I would like to write all these commands in one batch-file

  


  I already use .bat files to automatically convert to another format (for example) :

  


  for %%i in (*.mkv) do (
ffmpeg -y -i "%%i" -c copy "%%~ni.mp4"
)


  


  As far as I understand, for the audio track task I need to set a variable for .mp3 (besides %%i ) and make it compare to the .mkv name, but I don't understand how to do it correctly.

  


  to manually add a track, I use (for example) :

  


  ffmpeg -i video.mkv -i audio.mp3 -map 0 -map 1:a -c:v copy -shortest output.mkv


  


  to change the track order and set the default track, I use (for example) :

  


  ffmpeg -i input.mkv -map 0:v:0
-map 0:a:2 -map 0:a:0 -map 0:a:1 -map 0:a:3
-map 0:s -c copy
-disposition:a:0 default
reordered.mp4


  


  It takes a lot of time to do all this work with a lot of files. it would be great to delegate it to a machine.

  


• ffmpeg volumn not work in complex filter

  6 février 2018, par rick lee

  "volumn" filter not work in complex filter.
  the audio that converted volumn is not affected.

  env : Mac OS 10.12.6

  ffmpeg -i /path/bg.mp3 -y -filter_complex [0:0]volume=0[output] -map 
  
  [output] -acodec libmp3lame -write_xing 0 /path/mixed.mp3

  full log =====================================================================

  liqideMacBook-Pro:pinyin-api work$ ffmpeg -i 
  
  /Users/work/dev/codebase/pinyin/pinyin-api/test/resources/bg_audio2.mp3 
  
  -y -filter_complex [0:0]volume=0.1[output] -map [output] -acodec 
  
  libmp3lame -f mp3 -write_xing 0 /Users/work/dev/codebase/pinyin/pinyin-
  
  api/test/resources/mixed3.mp3
  
  ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4.1 --enable-
  
  shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --
  
  enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-
  
  gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-
  
  opencl --enable-videotoolbox --disable-lzma
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libavresample   3.  7.  0 /  3.  7.  0
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  Input #0, mp3, from '/Users/work/dev/codebase/pinyin/pinyin-
  
  api/test/resources/bg_audio2.mp3':
  
    Metadata:
  
      title           : 喜洋洋
  
      album           : 贺岁新年音乐会
  
      encoder         : Lavf56.4.101
  
    Duration: 00:02:43.58, start: 0.025057, bitrate: 128 kb/s
  
      Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 (mp3) -> volume
  
    volume -> Stream #0:0 (libmp3lame)
  
  Press [q] to stop, [?] for help
  
  Output #0, mp3, to '/Users/work/dev/codebase/pinyin/pinyin-
  
  api/test/resources/mixed3.mp3':
  
    Metadata:
  
      TIT2            : 喜洋洋
  
      TALB            : 贺岁新年音乐会
  
      TSSE            : Lavf57.83.100
  
      Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp
  
      Metadata:
  
        encoder         : Lavc57.107.100 libmp3lame
  
  [libmp3lame @ 0x7fad80001a00] Trying to remove 1152 samples, but the 
  
  queue is empty
  
  size=    2556kB time=00:02:43.57 bitrate= 128.0kbits/s speed=51.7x
  
  video:0kB audio:2556kB subtitle:0kB other streams:0kB global 
  
  headers:0kB muxing overhead: 0.003782%
  
  liqideMacBook-Pro:pinyin-api work$

  =====================================================================

• FFMPEG Python implementation

  29 décembre 2019, par user1452030

  I’m trying to implement the FFMPEG command in the following question in Python :

  ffmpeg : Repeat an audio watermark, except in the first frame

  FFMPEG Command :

  ffmpeg -i in.wav -filter_complex "amovie=watermark.wav:loop=0,asetpts=N/SR/TB,adelay=10s:all=1[beep];
  
  [0][beep]amix=duration=shortest,volume=2"  -b:a 320  out.mp3

  I’m trying to use the ffmpeg-python library, but I’m not particular about actual library. However I’d like the code to be platform agnostic i.e. I don’t want to run this as an OS command. This is what I tried so far :

  watermarkAudioStream = (
  
  ffmpeg
  
  .input('watermark.wav')
  
  .filter(amovie, watermarkFile,loop = 0)
  
  .filter(asetpts, 'N/SR/TB')
  
  .filter(adelay, '10s', all=1)
  
  )
  
  
  
  (
  
  ffmpeg
  
  .input(in.wav)
  
  .concat(watermarkAudioStream)
  
  .filter(amix, duration=shortest, volume=2)
  
  .output(out.mp3, 'b:a=320')
  
  .run()
  
  )

  Any guidance on getting this done would be much appreciated. Thanks in advance.