The global palette, also known as the Global Color Table (GCT) contains the colors that can be used by all GIF frames if they don't define their own Local Color Table (LCT). The next block outputs all the colors of the global palette in hexadecimal color format together with index positions of each color. Using this information, you can immediately see how long each frame is displayed on the screen. The next block summarizes the information from Graphic Control Extension (GCE) blocks and prints all information about the frame delays (in milliseconds). It contains the main information about the input GIF – GIF file size (in bytes), the total duration of the animation (in seconds), the dimensions of the animation (in pixels), the total number of frames (as integer), the global color table (as a list of indexes and hex colors), as well as the data from the Netscape Loop Block that contains the number of animation repetitions (as an integer). The first block is the general GIF information as well as the data from the Logical Screen Descriptor (LSD) block. The analyzer breaks a GIF into logical blocks, parses them, and shows the data about each block in text format. This is a super useful browser-based GIF debugger that analyzes a GIF file byte-by-byte and outputs all possible information about it.
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