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capture.lua

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require"imlua"

require"imlua_capture"

im.VideoCaptureReloadDevices()

print("--- Devices ---")

local n = im.VideoCaptureDeviceCount()

for i = 0, n - 1 do

desc = im.VideoCaptureDeviceDesc(i)

print(desc)

end

local vc = im.VideoCaptureCreate()

print("connect: ", vc:Connect(0))

print()

print("--- Dialogs ---")

local dc = vc:DialogCount()

for i = 0, dc - 1 do

desc = vc:DialogDesc(i)

print(i, desc)

vc:ShowDialog(i)

end

print()

print("--- Formats ---")

local fc = vc:FormatCount()

for i = 0, fc - 1 do

local success, width, height, desc = vc:GetFormat(i)

print(i, string.format("%dx%d", width, height), desc)

end

print()

print("--- Image Size ---")

local width, height = vc:GetImageSize()

print(width, height)

print()

print("--- Attributes ---")

attribs = vc:GetAttributeList()

for i, name in ipairs(attribs) do

local error, percent = vc:GetAttribute(name)

if error == 0 then percent = "get error" end

print(i, name, percent)

end

--vc:SetAttribute("FlipVertical", 1)

--vc:SetAttribute("FlipHorizontal", 1)

print()

print("--- Capture ---")

local image = im.ImageCreate(width, height, im.RGB, im.BYTE)

local res = vc:Live(1)

if (res > 0) then

print("grabbing frame")

print(vc:Frame(image, 3000))

end

image:Save("capture.jpg", "JPEG")

vc:Disconnect()