Compressing GIF (no rescale) results in broken GIF ~100 times larger than original

[simondud]

Compressing a 81 x 75 px. gif results in a visually broken gif size 7622 x 9472 px. The command is:

gifsicle -O3 in.gif --colors 256 -o out.gif

I have attached the gif file that shows the problem:

[kohler]

Hi, if you use gifsicle -I you can see some info about the initial contents of the gif. Its initial frames are very far out of scope:

kohler@Eddies-MacBook-Pro-4 gifsicle % src/gifsicle -I ~/Downloads/309186137-5026dd29-33f9-4d8d-85a8-bb091cbafb21.gif  
* /Users/kohler/Downloads/309186137-5026dd29-33f9-4d8d-85a8-bb091cbafb21.gif 291 images
  logical screen 81x75
  global color table [256]
  background 0
  + image #0 80x74 transparent 0
    disposal asis delay 0.32s
  + image #1 74x74 at 5106,9398
    local color table [2]
    disposal asis delay 0.06s
  + image #2 74x74 at 5106,9398
    local color table [2]
    disposal asis delay 0.14s
  + image #3 74x74 at 7548,4662
    local color table [2]
    disposal asis delay 0.04s
  + image #4 74x74 at 7548,4588
    local color table [2]
    disposal asis delay 0.08s
  + image #5 80x10 at 680,1550
    local color table [64]
    disposal asis delay 0.12s
  + image #6 74x74 at 7548,4662
    local color table [2]
    disposal asis delay 0.04s
  + image #7 74x74 at 7548,4588
    local color table [2]
    disposal asis delay 0.04s
  + image #8 80x10 at 680,1550
    local color table [64]
    disposal asis delay 0.02s
  + image #9 74x74 at 5698,6956
    local color table [2]
    disposal asis delay 0.02s
...

Gifsicle by default expands the output gif to include all frames of all inputs. That's the wrong choice for this gif. There needs to be an option that does the right thing here.