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• How to set up my complex filter with zoompan and xfade for ffmpeg using Fluent-FFmpeg .complexFilter method ?

  21 août 2024, par Rémy Groleau

  I'm using fluent-ffmpeg with Node.js. My problem is the setup of my complex filter.

  


  const filters = Array.from({ length: imageCount - 1 }).map((_, i) => {
        const rndInt = Math.floor(Math.random() * 1000) + 1

        return {
            zoompanFilter1: {
                filter: 'zoompan',
                options: {
                    z: 'min(zoom+0.001,1.3)',
                    d: `${imageDuration * 60}`, 
                    x: `iw/2-iw*(1/2-${rndInt}/100)*iw/zoom`, 
                    y: `ih/2-ih*(1/2-${rndInt}/100)*ih/zoom`, 
                    s: '1080x1920', // Output size
                    fps: '60'
                },
                inputs: `[${i}:v]`,
                outputs: `zoomed${i}`
            },
            zoompanFilter2: {
                filter: 'zoompan',
                options: {
                    z: 'min(zoom+0.001,1.3)', 
                    d: `${imageDuration * 60}`, 
                    x: 'iw/2-iw*(1/2-33/100)*iw/zoom',
                    y: 'ih/2-ih*(1/2-33/100)*ih/zoom',
                    s: '1080x1920', // Output size
                    fps: '60'
                },
                inputs: [`${i + 1}:v`],
                outputs: `zoomed${i + 1}`
            },
            xfadeFilter: {
                filter: 'xfade',
                options: {
                    transition: 'fade', // Crossfade transition effect
                    duration: '0.5', // Duration of crossfade in seconds
                    offset: `${imageDuration - 1}` // Offset to start the crossfade
                },
                inputs: [`zoomed${i + 1}`, `zoomed${i}`],
                outputs: `crossfaded${i}`
            },
        };
    });


  


  This is my complete code :

  


  async function createVideo() {
    // Escape file paths for Windows
    const videoPath = path.resolve(__dirname+ '/output.mp4').replace(/\\/g, '\\\\');
    const audioPath = path.resolve(__dirname+ '/output.mp3').replace(/\\/g, '\\\\');
    const backgroundMusicPath = path.resolve(__dirname+ '/background-music.mp3').replace(/\\/g, '\\\\');

    const command = ffmpeg();

    const imagesDir = path.join(__dirname, 'images');
    const images = fs.readdirSync(imagesDir)
        .filter(file => /.(jpg|jpeg|png)$/i.test(file)) // Filter image files
        .sort() // Sort filenames to ensure the correct order
        .map(file => path.join(imagesDir, file));

        images.map((image) => command.input(image))

    const imageCount = images.length;
    const audioDuration = await getAudioDurationInSeconds(audioPath);
    const imageDuration =  Math.round(audioDuration / imageCount)

    const filters = Array.from({ length: imageCount - 1 }).map((_, i) => {
        const rndInt = Math.floor(Math.random() * 1000) + 1

        return {
            zoompanFilter1: {
                filter: 'zoompan',
                options: {
                    z: 'min(zoom+0.001,1.3)', // Reset zoom to 1.0
                    d: `${imageDuration * 60}`, // Duration of the zoom effect
                    x: `iw/2-iw*(1/2-${rndInt}/100)*iw/zoom`, // Center x
                    y: `ih/2-ih*(1/2-${rndInt}/100)*ih/zoom`, // Center y
                    s: '1080x1920', // Output size
                    fps: '60'
                },
                inputs: `[${i}:v]`,
                outputs: `zoomed${i}`
            },
            zoompanFilter2: {
                filter: 'zoompan',
                options: {
                    z: 'min(zoom+0.001,1.3)', // Reset zoom to 1.0
                    d: `${imageDuration * 60}`, // Duration of the zoom effect
                    x: 'iw/2-iw*(1/2-33/100)*iw/zoom', // Center x
                    y: 'ih/2-ih*(1/2-33/100)*ih/zoom', // Center y
                    s: '1080x1920', // Output size
                    fps: '60'
                },
                inputs: [`${i + 1}:v`],
                outputs: `zoomed${i + 1}`
            },
            xfadeFilter: {
                filter: 'xfade',
                options: {
                    transition: 'fade', // Crossfade transition effect
                    duration: '0.5', // Duration of crossfade in seconds
                    offset: `${imageDuration - 1}` // Offset to start the crossfade
                },
                inputs: [`zoomed${i + 1}`, `zoomed${i}`],
                outputs: `crossfaded${i}`
            },
        };
    });

    command
    .input(audioPath)
    .input(backgroundMusicPath)
    .outputOptions([
        '-pix_fmt', 'yuv420p',
        '-c:v', 'libx264',
        '-c:a', 'aac',
        '-y',
        '-t', `${audioDuration}`,
        '-r', '60',
        '-s', '1080x1920',
        '-preset', 'ultrafast',
        '-map', '[final_video]',
        '-map', '[mixed_audio]',
    ])
    .complexFilter([
        // Apply zoompan filters and xfade transitions
        ...filters.flatMap(({ zoompanFilter1, zoompanFilter2, xfadeFilter }) => [
            zoompanFilter1,
            zoompanFilter2,
            xfadeFilter,
        ]),
        {
            filter: 'concat',
            options: {
                n: imageCount - 1, // Number of videos to concatenate
                v: 1, // Video streams
                a: 0 // No audio streams
            },
            inputs: filters.map((_, i) => `crossfaded${i}`),
            outputs: 'video_sequence'
        },
        {
            filter: 'curves',
            options: 'preset=increase_contrast',
            inputs: 'video_sequence',
            outputs: 'curves'
        },
        {
            filter: 'subtitles',
            options: `./subtitles.ass:fontsdir=./fonts/:force_style='FontName=Montserrat Black Italic,FontSize=17,MarginL=10,MarginV=25,Alignment=10,Spacing=0.2,Outline=0.1,Shadow=1.5'`,
            inputs: '[curves]',
            outputs: 'final_video'
        },
        {
            filter: 'volume',
            options: 0.3,  // Adjust the volume to 25% of the original
            inputs: `${imageCount + 1}:a`,
            outputs: 'background_music_adjusted'
        },
        // Apply the amix filter to mix the two audio inputs
        {
            filter: 'amix',
            options: {
                inputs: 2,
                duration: 'first',
                dropout_transition: 0,
                weights: '1 0.25',
                normalize: 0
            },
            inputs: [`${imageCount}:a`, 'background_music_adjusted'],
            outputs: 'mixed_audio'
        },
      ])
    .save(videoPath)
    .on('progress', function(progress) {
        console.log('Processing: ' + progress.percent + '% done');
      })
    .on('end', function(stdout, stderr) {
        // emptyFolder(imagesDir)
        console.log('Transcoding succeeded !');
      }) 
    .on('error', function(err) {
        console.error('Une erreur s\'est produite :', err.message);
    });
}


  


  My problem is I see the 1 image then the transition and i see the 2 image. After that I'm supposed to see the 3 image but I see the 2 image.

  


  What am I doing wrong ?

  


  I tried switching the inputs: [`zoomed${i + 1}`, `zoomed${i}`] to inputs: [`zoomed${i}`, `zoomed${i+1}`] but it just showed the next image and not a loop of consecutive images.

  


• ffmpeg cannot open a simple microsoft wav file exported with Audacity

  18 février 2014, par sebpiq

  I have exported a sound file to microsoft wav using Audacity.
  I am trying to open this file with ffmpeg :

  ffmpeg -i steps-stereo-16b-44khz.wav /tmp/test.ogg

  and here's the ouput I get :

  fmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jun 12 2013 13:46:11 with Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn)
  
    configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libspeex --enable-libass --enable-libbluray --enable-gnutls --enable-libfreetype --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-yasm --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid
  
    libavutil      52. 18.100 / 52. 18.100
  
    libavcodec     54. 92.100 / 54. 92.100
  
    libavformat    54. 63.104 / 54. 63.104
  
    libavdevice    54.  3.103 / 54.  3.103
  
    libavfilter     3. 42.103 /  3. 42.103
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  [dca @ 0x7fd30c013600] Not a valid DCA frame
  
  
  
  ... SNIP ...
  
  
  
  [dca @ 0x7fd5bc013600] Invalid bit allocation index
  
  [dca @ 0x7fd5bc013600] error decoding block
  
      Last message repeated 3 times
  
  [dca @ 0x7fd5bc013600] Didn't get subframe DSYNC
  
  [dca @ 0x7fd5bc013600] error decoding block
  
  [wav @ 0x7fd5bc013000] max_analyze_duration 5000000 reached at 5009070 microseconds
  
  [wav @ 0x7fd5bc013000] decoding for stream 0 failed
  
  [wav @ 0x7fd5bc013000] Could not find codec parameters for stream 0 (Audio: dts ([1][0][0][0] / 0x0001), 192000 Hz, 2 channels, fltp, 0 kb/s): no decodable DTS frames
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  steps-stereo-16b-44khz.wav: could not find codec parameters

  If I export the same file to .ogg or .aiff, no problem, the following works fine :

  ffmpeg -i steps-stereo-16b-44khz.aiff /tmp/test.ogg

  Any idea what could be wrong ?

  A link to my wav file so you can try to reproduce.

  NB my final goal is to slice the audio file. I know I can export file directly to .ogg with audacity. This is just a test case.

  EDIT

  Getting file info with another program like sox, works well :

  sox --info steps-stereo-16b-44khz.wav
  
  
  
  Input File     : 'steps-stereo-16b-44khz.wav'
  
  Channels       : 2
  
  Sample Rate    : 44100
  
  Precision      : 16-bit
  
  Duration       : 00:00:02.10 = 92608 samples = 157.497 CDDA sectors
  
  File Size      : 370k
  
  Bit Rate       : 1.41M
  
  Sample Encoding: 16-bit Signed Integer PCM

• ffmpef cannot open a simple microsoft wav file exported with Audacity

  23 juillet 2013, par sebpiq

  I have exported a sound file to microsoft wav using Audacity.
  I am trying to open this file with ffmpeg :

  ffmpeg -i steps-stereo-16b-44khz.wav /tmp/test.ogg

  and here's the ouput I get :

  fmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jun 12 2013 13:46:11 with Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn)
  
    configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libspeex --enable-libass --enable-libbluray --enable-gnutls --enable-libfreetype --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-yasm --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid
  
    libavutil      52. 18.100 / 52. 18.100
  
    libavcodec     54. 92.100 / 54. 92.100
  
    libavformat    54. 63.104 / 54. 63.104
  
    libavdevice    54.  3.103 / 54.  3.103
  
    libavfilter     3. 42.103 /  3. 42.103
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  [dca @ 0x7fd30c013600] Not a valid DCA frame
  
  
  
  ... SNIP ...
  
  
  
  [dca @ 0x7fd5bc013600] Invalid bit allocation index
  
  [dca @ 0x7fd5bc013600] error decoding block
  
      Last message repeated 3 times
  
  [dca @ 0x7fd5bc013600] Didn't get subframe DSYNC
  
  [dca @ 0x7fd5bc013600] error decoding block
  
  [wav @ 0x7fd5bc013000] max_analyze_duration 5000000 reached at 5009070 microseconds
  
  [wav @ 0x7fd5bc013000] decoding for stream 0 failed
  
  [wav @ 0x7fd5bc013000] Could not find codec parameters for stream 0 (Audio: dts ([1][0][0][0] / 0x0001), 192000 Hz, 2 channels, fltp, 0 kb/s): no decodable DTS frames
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  steps-stereo-16b-44khz.wav: could not find codec parameters

  If I export the same file to .ogg or .aiff, no problem, the following works fine :

  ffmpeg -i steps-stereo-16b-44khz.aiff /tmp/test.ogg

  Any idea what could be wrong ?

  A link to my wav file so you can try to reproduce.

  NB my final goal is to slice the audio file. I know I can export file directly to .ogg with audacity. This is just a test case.