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• ffmpeg removes audio from video instead of add audio to the video

  23 août 2023, par James

  trying to add background audio to a video in nodejs express, but instead of adding audio to the video it removes the audio from video how to fix ?

  


  import { path as ffmpegPath } from '@ffmpeg-installer/ffmpeg';
import ffmpeg from 'fluent-ffmpeg';
import { fileURLToPath } from 'url';
import { dirname } from 'path';
import path from 'path';

ffmpeg.setFfmpegPath(ffmpegPath);

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

const video = path.resolve(__dirname, 'video3.mp4');
const audio = path.resolve(__dirname, 'video5.mp4');
const destination = path.resolve(__dirname, 'output.mp4');

setTimeout(() => {
  ffmpeg()
    .input(video)
    .input(audio)
    .complexFilter([
      {
        filter: 'amix', options: { inputs: 2, duration: 'longest' }
      }
    ])
    .on('end', async function (output) {
      console.log(output, 'files have been merged and saved.')
    })
    .saveToFile(destination)
}, 3000);


  


• Looking for a general purpose way to merge audio and video file and make an output have stereo audio with FFmpeg

  21 février 2020, par Pineapple Joe

  So have have the following FFmpeg command

  ffmpeg -i vidab.mp4 -i recab.webm  -filter_complex "[0:a]volume=0.2,apad[A];[1:a][A]amerge[Aout]" -map 0:v -map [Aout] -y mergeab.mp4

  When the input files are played separately their audio is played equally through both headphones.

  But after being merged the audio from the video is on the right side and the audio from the webm file is on the left side.

  I see this in the output when I run the cmd

  [Parsed_amerge_2 @ 0x7fa0faf01bc0] No channel layout for input 1
  
  [Parsed_amerge_2 @ 0x7fa0faf01bc0] Input channel layouts overlap: output layout will be determined by the number of distinct input channels

  How can I adjust this so that the output file has the audio from both the inputs in equally in the left and right sides ?

  Also is there a generic way to do this such that even different configurations (video has stereo and audio has mono ... or both have stereo) result in the Audio being split evenly.

  I tried using the pan filter but there is something I am not understanding about how it works because either nothing happens or I flip left and right. But I am not getting even stereo.

  fwiw here is the full output.

  ffmpeg -i vidab.mp4 -i recab.webm  -filter_complex "[0:a]volume=0.2,apad[A];[1:a][A]amerge[Aout]" -map 0:v -map [Aout] -y mergeab.mp4
  
  ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with Apple clang version 11.0.0 (clang-1100.0.33.8)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.1_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.jdk/Contents/Home/include/darwin -fno-stack-check' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  
    libavutil      56. 31.100 / 56. 31.100
  
    libavcodec     58. 54.100 / 58. 54.100
  
    libavformat    58. 29.100 / 58. 29.100
  
    libavdevice    58.  8.100 / 58.  8.100
  
    libavfilter     7. 57.100 /  7. 57.100
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  5.100 /  5.  5.100
  
    libswresample   3.  5.100 /  3.  5.100
  
    libpostproc    55.  5.100 / 55.  5.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'vidab.mp4':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      creation_time   : 2020-02-21T00:35:25.000000Z
  
    Duration: 00:00:10.65, start: 0.000000, bitrate: 2539 kb/s
  
      Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 96 kb/s (default)
  
      Metadata:
  
        creation_time   : 2020-02-21T00:35:25.000000Z
  
        handler_name    : Core Media Audio
  
      Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 1280x640, 2436 kb/s, 29.87 fps, 29.97 tbr, 90k tbn, 180k tbc (default)
  
      Metadata:
  
        creation_time   : 2020-02-21T00:35:25.000000Z
  
        handler_name    : Core Media Video
  
        encoder         : H.264
  
  Input #1, matroska,webm, from 'recab.webm':
  
    Metadata:
  
      encoder         : opus-media-recorder
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #1:0(eng): Audio: opus, 48000 Hz, mono, fltp (default)
  
  Stream mapping:
  
    Stream #0:0 (aac) -> volume (graph 0)
  
    Stream #1:0 (opus) -> amerge:in0 (graph 0)
  
    Stream #0:1 -> #0:0 (h264 (native) -> h264 (libx264))
  
    amerge (graph 0) -> Stream #0:1 (aac)
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x7fa0fb004000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 0x7fa0fb004000] profile High, level 3.1
  
  [libx264 @ 0x7fa0fb004000] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=12 lookahead_threads=2 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=25 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
  
  [Parsed_amerge_2 @ 0x7fa0faf01bc0] No channel layout for input 1
  
  [Parsed_amerge_2 @ 0x7fa0faf01bc0] Input channel layouts overlap: output layout will be determined by the number of distinct input channels
  
  Output #0, mp4, to 'mergeab.mp4':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      encoder         : Lavf58.29.100
  
      Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuvj420p(pc, progressive), 1280x640, q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
  
      Metadata:
  
        creation_time   : 2020-02-21T00:35:25.000000Z
  
        handler_name    : Core Media Video
  
        encoder         : Lavc58.54.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        encoder         : Lavc58.54.100 aac
  
  frame=  318 fps=107 q=-1.0 Lsize=    1568kB time=00:00:17.72 bitrate= 724.8kbits/s speed=5.99x    
  
  video:1282kB audio:272kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.902630%
  
  [libx264 @ 0x7fa0fb004000] frame I:2     Avg QP:19.72  size: 51154
  
  [libx264 @ 0x7fa0fb004000] frame P:148   Avg QP:21.28  size:  6644
  
  [libx264 @ 0x7fa0fb004000] frame B:168   Avg QP:25.18  size:  1351
  
  [libx264 @ 0x7fa0fb004000] consecutive B-frames:  1.3% 84.9%  0.0% 13.8%
  
  [libx264 @ 0x7fa0fb004000] mb I  I16..4: 23.2% 49.3% 27.5%
  
  [libx264 @ 0x7fa0fb004000] mb P  I16..4:  2.1%  2.0%  0.2%  P16..4: 29.0%  5.1%  4.8%  0.0%  0.0%    skip:56.8%
  
  [libx264 @ 0x7fa0fb004000] mb B  I16..4:  0.5%  0.3%  0.0%  B16..8: 16.7%  0.8%  0.2%  direct: 6.1%  skip:75.4%  L0:24.8% L1:71.1% BI: 4.1%
  
  [libx264 @ 0x7fa0fb004000] 8x8 transform intra:45.4% inter:74.3%
  
  [libx264 @ 0x7fa0fb004000] coded y,uvDC,uvAC intra: 29.3% 51.4% 11.6% inter: 5.7% 16.6% 0.3%
  
  [libx264 @ 0x7fa0fb004000] i16 v,h,dc,p: 11% 53% 10% 26%
  
  [libx264 @ 0x7fa0fb004000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 36% 35%  2%  2%  2%  4%  2%  3%
  
  [libx264 @ 0x7fa0fb004000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 30% 12%  4%  6%  5%  7%  5%  6%
  
  [libx264 @ 0x7fa0fb004000] i8c dc,h,v,p: 47% 33% 17%  4%
  
  [libx264 @ 0x7fa0fb004000] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x7fa0fb004000] ref P L0: 76.6%  7.6% 11.1%  4.7%
  
  [libx264 @ 0x7fa0fb004000] ref B L0: 89.1% 10.3%  0.6%
  
  [libx264 @ 0x7fa0fb004000] ref B L1: 99.7%  0.3%
  
  [libx264 @ 0x7fa0fb004000] kb/s:989.60
  
  [aac @ 0x7fa0fb005800] Qavg: 13376.354

• FFMPEG - Concatenate 2 MP4 Files, one has video and audio and the other has only audio

  5 août 2016, par Avi

  I am trying to merge 2 mp4 files using FFMPEG. One of these files has both video and audio (track1.mp4), while the other one has only audio (track2.mp4). The names of these files are listed in a text file called 'filesToMerge.txt' in the following manner :

  file 'track1.mp4'
  
  file 'track2.mp4'

  I then execute the following ffmpeg command to merge them.

  ffmpeg -f concat -i filesToMerge.txt -c copy output.mp4

  However, the concatenated file that is generated consists of only the first file that is listed in filesToMerge.txt. That is, if track1.mp4 (which has both video and audio) is the first file in the list, then only that file makes up output.mp4 (the concatenated file produced) and vice versa.

  I would like for both files to be in output.mp4. I am using Ubuntu 14.04 (if that helps). How can I solve this problem ?

  When I run this command
  ffmpeg -i track1.mp4 -i track2.mp4 output.mp4
  I get the following

  ffmpeg version N-76944-g15206ff Copyright (c) 2000-2015 the FFmpeg developers
  
        built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
        configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libdcadec --enable-libfreetype --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
  
        libavutil      55.  9.100 / 55.  9.100
  
        libavcodec     57. 16.101 / 57. 16.101
  
        libavformat    57. 19.100 / 57. 19.100
  
        libavdevice    57.  0.100 / 57.  0.100
  
        libavfilter     6. 17.100 /  6. 17.100
  
        libavresample   3.  0.  0 /  3.  0.  0
  
        libswscale      4.  0.100 /  4.  0.100
  
        libswresample   2.  0.101 /  2.  0.101
  
        libpostproc    54.  0.100 / 54.  0.100
  
      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'track1.mp4':
  
        Metadata:
  
          major_brand     : isom
  
          minor_version   : 512
  
          compatible_brands: isomiso2avc1mp41
  
          encoder         : Lavf56.40.101
  
        Duration: 00:00:10.76, start: 0.023220, bitrate: 351 kb/s
  
          Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 800x400 [SAR 400:533 DAR 800:533], 181 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
          Metadata:
  
            handler_name    : VideoHandler
  
          Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 194 kb/s (default)
  
          Metadata:
  
            handler_name    : SoundHandler
  
      Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'track2.mp4':
  
        Metadata:
  
          major_brand     : isom
  
          minor_version   : 512
  
          compatible_brands: isomiso2mp41
  
          creation_time   : 1970-01-01 00:00:00
  
          encoder         : Lavf52.32.0
  
        Duration: 00:00:32.21, start: 0.000000, bitrate: 46 kb/s
  
          Stream #1:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 43 kb/s (default)
  
          Metadata:
  
            creation_time   : 1970-01-01 00:00:00
  
            handler_name    : SoundHandler
  
      [libx264 @ 0x3950ce0] using SAR=400/533
  
      [libx264 @ 0x3950ce0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
  
      [libx264 @ 0x3950ce0] profile High, level 3.0
  
      [libx264 @ 0x3950ce0] 264 - core 142 r2491 24e4fed - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - 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=1 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=25 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
  
          encoder         : Lavf57.19.100
  
          Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 800x400 [SAR 400:533 DAR 800:533], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
  
          Metadata:
  
            handler_name    : VideoHandler
  
            encoder         : Lavc57.16.101 libx264
  
          Stream #0:1(und): Audio: aac (libfdk_aac) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128 kb/s (default)
  
          Metadata:
  
            handler_name    : SoundHandler
  
            encoder         : Lavc57.16.101 libfdk_aac
  
      Stream mapping:
  
        Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
        Stream #0:1 -> #0:1 (aac (native) -> aac (libfdk_aac))
  
      Press [q] to stop, [?] for help
  
      frame=  270 fps= 99 q=28.0 Lsize=     382kB time=00:00:10.72 bitrate= 291.9kbits/s dup=1 drop=0    
  
      video:230kB audio:143kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.482656%
  
      [libx264 @ 0x3950ce0] frame I:2     Avg QP:18.87  size:109452
  
      [libx264 @ 0x3950ce0] frame P:68    Avg QP:15.09  size:   171
  
      [libx264 @ 0x3950ce0] frame B:200   Avg QP:23.33  size:    23
  
      [libx264 @ 0x3950ce0] consecutive B-frames:  1.1%  0.0%  1.1% 97.8%
  
      [libx264 @ 0x3950ce0] mb I  I16..4: 11.0% 39.6% 49.5%
  
      [libx264 @ 0x3950ce0] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  5.9%  0.1%  0.0%  0.0%  0.0%    skip:93.9%
  
      [libx264 @ 0x3950ce0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.3%  0.0%  0.0%  direct: 0.0%  skip:99.7%  L0:21.8% L1:78.2% BI: 0.0%
  
      [libx264 @ 0x3950ce0] 8x8 transform intra:39.7% inter:92.8%
  
      [libx264 @ 0x3950ce0] coded y,uvDC,uvAC intra: 92.0% 95.0% 73.2% inter: 0.1% 1.4% 0.0%
  
      [libx264 @ 0x3950ce0] i16 v,h,dc,p:  1% 30%  4% 66%
  
      [libx264 @ 0x3950ce0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  6% 55% 16%  2%  4%  2%  8%  2%  6%
  
      [libx264 @ 0x3950ce0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 18% 13%  7%  9%  7% 12%  6% 11%
  
      [libx264 @ 0x3950ce0] i8c dc,h,v,p: 44% 35% 10% 11%
  
      [libx264 @ 0x3950ce0] Weighted P-Frames: Y:0.0% UV:0.0%
  
      [libx264 @ 0x3950ce0] ref P L0: 98.1%  0.2%  1.1%  0.5%
  
      [libx264 @ 0x3950ce0] ref B L0: 85.1% 13.2%  1.7%
  
      [libx264 @ 0x3950ce0] ref B L1: 93.6%  6.4%
  
      [libx264 @ 0x3950ce0] kb/s:174.10