Optimize very badly afterward due major color changes. Operations that do such drastic changes to images, such as major colorĬhanges, and shadings, and with semi-transparency, that the resultingįor example just about any " -resize" operation is likely to produce an animation that will Involving animations, especially with IM's optimizer, there are some While this 'coalesce-optimize' technique will work with most operations If you get really good you can even do so far as doing Animation Merging to overlay an animated copyright notice on your Of course you may need to use the special Layers Composition technique to actually overlayĪn image onto every frame in an animation. This method will let you overlay any sort of annotation, copyright notice, or This is actually more optimal than if it had drawn on Note how the IM animation optimizer actually decided to just not overwrite the Gif_anim_montage draw_circle_fail.gif draw_circle_fail_frames.gif Image, and completely ignore any offset it may have on a larger canvas.įor example, here we draw a fancy green circle near the top left corner of theĬonvert canvas_prev.gif -fill LimeGreen -stroke SeaGreen \ This includes all " -draw" operations, which only draw things relative to the actual Places text relative to the virtual canvas of each frame, many other images As such (and as you will see) removing any existing frameĪnd transparency optimizations by Coalescing it first is recommended. Unusual effects, due to an animations existing optimization scheme (see next One word of warning, drawing on an animation like this, without first Coalescing the animation, can cause some Or virtual canvas offset a sub-frame may have. Information, and overlays, relative to the actual image, and ignored any page Text on each frame is correct for an animated image.īefore version 6.2.6 however " -annotate", like many other image operators, positioned Image, and not relative to the actual image data. The reason this works, is that " -annotate" will position text relative to the virtual canvas of an You are now sure you will not have color problems. Just do not do the final save to GIF unless Want to work on an animation in steps or use individual PNG format images forĮach of the frames being edited. You can use the IM internal format MIFF, as a temporary file format if you This is especially important for resized GIF animations, or ones you haveĪdded a multi-color overlay or underlay, as this can add a lot of extra Not only thatīut it did each frame completely separately to every other frame, producingĭifferent color selections and dither patterns. Resulting animation worse, as IM would have now performed an automatic Color Quantization, to reduce the number ofĬolors present to fit the images into the limited GIF format. If you made the big mistake of saving to GIF you would have just made the Processing, directly to GIF, especially images that you have yet to perform Simple Modifications of Animations First an Important pointĭO NOT save the intermediate, animations which you are not finished Highly recommended that you read and understand the Basics of Animations and at least the overall handling of Optimizing GIF Animations, before trying to This page contains practical examples of working with GIF animations.
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