Is there a way to quickly remove every other frame?

[JB]

Without having to select each one, is there a way to quick remove every other frame?

[behreajj]

I would use a Lua script. https://www.aseprite.org/docs/scripting/

local delete = 1
local skip = 1
local offset = 0

local sprite = app.activeSprite
if not sprite then return end

local layer = app.activeLayer
if not layer then return end
if layer.isGroup then return end

local all = delete + skip
local frames = sprite.frames
local lenFrames = #frames

app.transaction(function()
    local i = lenFrames
    while i > 0 do i = i - 1
        if (i + offset) % all < delete then
            sprite:deleteFrame(frames[1 + i])

            -- To delete cels instead of frames
            -- in cases where sprite has multiple layers.
            -- local cel = layer:cel(frames[1 + i])
            -- if cel then
            --     sprite:deleteCel(cel)
            -- end
        end
    end
end)

Like the comment in the code says, if you'd like to delete a frame's image contents, but leave the frame itself, you can do that as well.

[JB]

omg thank you! this is great, I didn't even know you could do this!

[Nito]

heres a version with an input prompt instead of hardcoded values

local dlg = Dialog { title = "Remove Frames" }
dlg:label { id = "label1", text = "Delete X frames:" }
dlg:number { id = "delete", text = "1", decimals = 0, value = 1 }

dlg:label { id = "label2", text = "Skip Y frames after each delete:" }
dlg:number { id = "skip", text = "1", decimals = 0, value = 1 }

dlg:label { id = "label3", text = "Start from frame Z:" }
dlg:number { id = "offset", text = "1", decimals = 0, value = 0 }

dlg:button { id = "ok", text = "OK" }
dlg:button { id = "cancel", text = "Cancel" }

dlg:show()

local data = dlg.data
if not data.ok then return end

local delete = data.delete or 1
local skip = data.skip or 1
local offset = data.offset or 0

local sprite = app.activeSprite
if not sprite then return end

local layer = app.activeLayer
if not layer then return end
if layer.isGroup then return end

local all = delete + skip
local frames = sprite.frames
local lenFrames = #frames

app.transaction(function()
    local i = lenFrames
    while i > 0 do i = i - 1
        if (i + offset) % all < delete then
            sprite:deleteFrame(frames[1 + i])

            -- To delete cels instead of frames in cases where sprite has multiple layers
            -- local cel = layer:cel(frames[1 + i])
            -- if cel then
            --     sprite:deleteCel(cel)
            -- end
        end
    end
end)