Video creation example does not work to naive way

New to Julia
1

Hi,
I would like to create a video from a set of pregenerated PNGs, but the naive way to copy the example from the docs does not work unfortunately. I’ve already adapted the example slightly to call the right(?) load() function.
What am I missing?

using Luxor
using VideoIO, ProgressMeter

function run_it()
    drawing_number = 1
    for i in 1:100
        Drawing(250, 250, :rec)
        background("white")
        origin()
        radius = 50
        pt1 = Point(0, 0)
        sethue("blue")
        circle(pt1, radius, :stroke)
        pt2 = rand(BoundingBox())
        if distance(pt1, pt2) < radius
            circle(pt2, 5, :fill)
            snapshot(fname=string(@__DIR__, "/tmp/", lpad(drawing_number, 10, "0"), ".png"))
            drawing_number += 1
            @info "we saved a snapshot when i was $(i)"
        end
    end
    finish()
end

run_it()

dir = string(@__DIR__, "/tmp") #path to directory holding images
imgnames = filter(x->occursin(".png",x), readdir(dir)) # Populate list of all .pngs
intstrings =  map(x->split(x,".")[1], imgnames) # Extract index from filenames
p = sortperm(parse.(Int, intstrings)) #sort files numerically
imgnames = imgnames[p]

encoder_options = (crf=23, preset="medium")

firstimg = VideoIO.load(joinpath(dir, imgnames[1]))
open_video_out("video.mp4", firstimg, framerate=5, encoder_options=encoder_options) do writer
    @showprogress "Encoding video frames.." for i in eachindex(imgnames)
        img = VideoIO.load(joinpath(dir, imgnames[i]))
        write(writer, img)
    end
end

This gives an error:

ERROR: LoadError: MethodError: no method matching VideoIO.VideoWriter(::String, ::Vector{PermutedDimsArray{ColorTypes.RGB{FixedPointNumbers.N0f8}, 2, (2, 1), (2, 1), Matrix{ColorTypes.RGB{FixedPointNumbers.N0f8}}}}; framerate::Int64, encoder_options::@NamedTuple{crf::Int64, preset::String})

Closest candidates are:
  VideoIO.VideoWriter(::AbstractString, !Matched::Type{T}, !Matched::Tuple{Integer, Integer}; codec_name, framerate, scanline_major, container_options, container_private_options, encoder_options, encoder_private_options, swscale_options, target_pix_fmt, pix_fmt_loss_flags, input_colorspace_details, allow_vio_gray_transform, sws_color_options, thread_count) where T
   @ VideoIO ~/.julia/packages/VideoIO/ZM7RD/src/encoding.jl:234
  VideoIO.VideoWriter(::Any, !Matched::AbstractMatrix{T}; kwargs...) where T
   @ VideoIO ~/.julia/packages/VideoIO/ZM7RD/src/encoding.jl:379

Stacktrace:
 [1] open_video_out(s::String, args::Vector{PermutedDimsArray{ColorTypes.RGB{FixedPointNumbers.N0f8}, 2, (2, 1), (2, 1), Matrix{ColorTypes.RGB{FixedPointNumbers.N0f8}}}}; kwargs::@Kwargs{framerate::Int64, encoder_options::@NamedTuple{crf::Int64, preset::String}})
   @ VideoIO ~/.julia/packages/VideoIO/ZM7RD/src/encoding.jl:473
 [2] open_video_out(f::var"#5#6", s::String, args::Vector{PermutedDimsArray{ColorTypes.RGB{FixedPointNumbers.N0f8}, 2, (2, 1), (2, 1), Matrix{ColorTypes.RGB{FixedPointNumbers.N0f8}}}}; kwargs::@Kwargs{framerate::Int64, encoder_options::@NamedTuple{crf::Int64, preset::String}})
   @ VideoIO ~/.julia/packages/VideoIO/ZM7RD/src/encoding.jl:476
 [3] top-level scope
   @ ~/Documents/Julia/AdventOfCode/AoC2023/10/anim2.jl:36
2

You’re using VideoIO.load to load the images. You should be using an Image loading package for that. i.e. ImageIO via FileIO

3

I’ve added “using FileIO”. Now it works.
Thanks!

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