Java – get the first frame of the GIF image without downloading all other frames

I want to get GIF images from the Internet, but I find that if I download the whole GIF image, it will lead to a lot of network traffic

Can I get only the first frame of the GIF image without downloading all the other frames?

Solution

Well, I haven't found a ready-made solution yet, but you can do it (it will lead to some "low-level" skills):

After wiki about gifs, the animated GIF file can be divided into frames, and the end of the frame can be easily recognized Therefore, you need to read the GIF title, screen information and information about animation into the buffer, download the first frame and attach GIF and other information ("3B" after the wiki article) Also, if you copy this data into a separate buffer, you will be able to continue the entire file download without having to download the first frame again

You can also edit the header information to format the first frame as a static GIF