If you attempt to convert a video into an image sequence and select apng, avif, gif, or webp, rather than getting a sequence of individual images like you would for other formats such as png, you'll get a single animated image.
While some of these formats are primarily used for animated images anyway, static webps are commonplace and used in all sorts of places such as Wikipedia, and I could see someone making animated gifs wanting access to each frame as an individual image.
As proof of an actual use case, I'm currently weighing my options regarding how to render a short tutorial video in Godot, which only supports Theora, so I was considering using an image sequence instead. I was impressed with webp's quality and filesize and was considering it as an option, but while Godot offers webp support, it doesn't offer animated webp support, so I wanted to see what kind of filesize I'd be looking at if I was working with individual images, but was unable to do so.
Additionally, the "interpret video footage to X FPS" option is currently locked unless you specify you want an image sequence. Ideally, if the ability to output sequences of individual gif/webp/etc. images is added, these two images should be uncoupled for those formats. Otherwise, if a user wants to convert, let's say an mp4 to a single animated gif, they won't be able to specify their desired FPS.
If you attempt to convert a video into an image sequence and select apng, avif, gif, or webp, rather than getting a sequence of individual images like you would for other formats such as png, you'll get a single animated image.
While some of these formats are primarily used for animated images anyway, static webps are commonplace and used in all sorts of places such as Wikipedia, and I could see someone making animated gifs wanting access to each frame as an individual image.
As proof of an actual use case, I'm currently weighing my options regarding how to render a short tutorial video in Godot, which only supports Theora, so I was considering using an image sequence instead. I was impressed with webp's quality and filesize and was considering it as an option, but while Godot offers webp support, it doesn't offer animated webp support, so I wanted to see what kind of filesize I'd be looking at if I was working with individual images, but was unable to do so.
Additionally, the "interpret video footage to X FPS" option is currently locked unless you specify you want an image sequence. Ideally, if the ability to output sequences of individual gif/webp/etc. images is added, these two images should be uncoupled for those formats. Otherwise, if a user wants to convert, let's say an mp4 to a single animated gif, they won't be able to specify their desired FPS.