Uploading gifs as costumes imports images in wrong order

[BryceLTaylor]

Expected Behavior

If you import gifs as costumes for a sprite it should import the images in the same order as they appear in the gif.

Actual Behavior

The images appear out of order. We fixed this issue (#4509) for sprite upload, but when you upload a gif as a costume they appear out of order.

related to issues: #3541 and #3254

Steps to Reproduce

Upload a relatively large gif with fluid motion such as this one:

Import the gif as a sprite
Build this stack:

Click the green flag
Note: the gif plays back smoothly
Now create a new empty sprite
Open the costumes tab
Choose Upload a costume
Choose the same gif
Add the same stack to this sprite
Click the green flag
Note: the gif jumps around because the images have come in out of order.

Here is a project I made to demonstrate, though to see the import behavior you will have to create a new one.

Operating System and Browser

Mac Chrome

[redstone-dev]

Interesting...

[josiauh]

If you don't use the wait block it's faster

[josiauh]

and smoothery (i guess)

[BoomerScratch]

Duplicate of #5138

[BryceLTaylor]

@BoomerScratch I ended up closing #5138 since it seemed its repro steps were a little less reliable and this one was already triaged.

[jespino]

I'm not able to reproduce this bug using firefox in linux. I don't know if this is already fixed, or it is a Mac/Chrome related bug.

[RockGuyDog]

Bump this is still broken

[fliiiiiiiiiiiiiiiiiiiiiiiiiiiiiiick]

bump

[CubicMathTime]

Bump, big gifs are totally out of order and it takes forever to reorder

[HeidiTao]

@chrisgarrity We'd like to try working on this! (@alx-zhu @sherryzhuge1 @Victor-Crawshaw @John-Crawshaw)

[alx-zhu]

Hey @chrisgarrity @BryceLTaylor, we've found a working solution for the gif ordering issues linked in PR #9774! Would appreciate if you took a look!