This desire to support broken GIF files is why even in 2020 browsers limit GIF frame delay to 10ms.Įven so, if you only need 25fps for your video, you can get 4*256=1024 colors. This resulted in a lot of GIFs that would look broken when the browsers would follow the GIF spec. Then people kept setting frame delay to 0 in their GIFs but it looked still fine in Internet Explorer. This got started in the 90s due to performance concerns in Internet Explorer. Specifically all browsers set a minimum frame delay to 10ms = 100fps. Unfortunately there's a difference between what GIF allows and what popular browsers allow GIF to do. These three points combined allow you to show any video in full 8-bit color via the GIF format. * An infinite frame rate (no delay between two frames), which is also configured per frame * Transparency in a frame, which will show the previous frame underneath The hacks you allude to are based on the fact that GIF also allows you to use:
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