Add multiple images to video fluent-ffmpeg

Question

I manage to add a single image to a video starting at a certain time and ending at a certain time, but I cannot find a way to do this for multiple images. I use fluent-ffmpeg.

This is the code I have:

ffmpeg('../videos/testklein.mp4')
     .input('../src/test.png')
     .input('../src/0.png')
     .input('../src/1.png')
     .addOptions([
        "-strict -2"
     ])

     .complexFilter([
        {
          filter: 'overlay',
          options: {
            x: 200,
            y: 200,
            enable: 'between(t,1,3)',

          }}, {
          filter: 'overlay',
          options: {
            x: 200,
            y: 200,
            enable: 'between(t,3,5)',
          }},
           {
          filter: 'overlay',
          options: {
             x: 200,
            y: 200,
            enable: 'between(t,5,7)',
          }
      },

    ])

I suppose I need to explicitly state what filter should take what file, but I am not sure about the syntax for that.

Answer 1

This is the right syntax: The first one add inputs [0:v][1:v] and outputs ['tmp'] Then add ['tmp'] as inputs for the next one. For 2 images:

I can add as many images as I want. Pass the 'tmp' as 2nd argument to complexFilter!

(You can ofcourse change tmp to any string)

.complexFilter(
    [
      {
        "filter": "overlay",
        "options": {
          "enable": "between(t,2,4)",
          "x": "810",
          "y": "465"
        },
        "inputs": "[0:v][1:v]",
        "outputs": "tmp"
      },
      {
        "filter": "overlay",
        "options": {
          "enable": "between(t,13,14)",
          "x": "810",
          "y": "465"
        },
        "inputs": "[tmp][2:v]",
        "outputs": "tmp"
      }
    ], 'tmp')