Create a image file from binary data in Ruby

Question

I am able to access the binary data of a file and store it in a varible like this

s = File.binread("sample_22122015_03.jpg")
bits = s.unpack("B*")[0]

where bits has data like this "101001001010100100......."

However, I want to do some changes and again write the binary data back to a new image, but I am unable to.

I am using

File.open('shipping_label_new.jpg', 'wb') do|f|
f.write(Base64.decode64(bits))
end

but it's not working and I see that the image is corrupt.

Answer 1

Try this code

s = File.binread("test_img.jpg")
bits = s.unpack("B*")

File.open('new_test_img.jpg', 'wb') do|f|
  f.write(bits.pack("B*"))
end