How to play picture sequences smoothly with CSS animation?
Apr 04, 2025 pm 05:57 PM
How to use CSS animation to achieve smooth picture sequence playback?
Many scenes require simulated video playback effects, but the material is a sequence of pictures. The method of directly replacing the image path is inefficient and is prone to black screen or confusion caused by loading delay. This article provides a solution based on CSS animation to effectively avoid such problems.
Preloading all images is not the best solution, especially when the number of images is huge, management and loading costs are too high.
A better strategy is to splice the pictures into a long picture. Assuming that all images are the same size (for example, 500x300 pixels), splice the three images horizontally into a long image of 1500x300 pixels. Use background-position attribute of CSS and @keyframes animation to simulate image playback.
The following CSS code example:
.container {
width: 500px;
height: 300px;
background: url("split image") left / auto 100% no-repeat;
animation: play animation duration steps(1, start) 0s infinite normal none;
}
@keyframes play {
from { background-position: 0 0; } /* Photo 1*/
33.3% { background-position: -500px 0; } /* Photo 2*/
66.7% { background-position: -1000px 0; } /* Photo 3*/
to { background-position: 0 0; } /* Go back to the first picture, play it loop*/
}
In the code, .container defines the container and the background image is a long picture of the stitching. animation attribute defines the animation play , steps(1, start) ensures that the animation is played step by step, and動(dòng)畫時(shí)長(zhǎng)needs to be adjusted according to the number of pictures and the playback speed. background-position controls the display area and switches pictures by modifying its value. The percentage in keyframes needs to be adjusted according to the number and size of the picture, and the display time of each picture is accurately controlled.
This method avoids loading one by one, improves playback fluency, and makes the code simple and easy to understand. The premise is that all pictures are the same size. If the size is inconsistent, pre-processing must be done using canvas or other image processing techniques.
The above is the detailed content of How to play picture sequences smoothly with CSS animation?. For more information, please follow other related articles on the PHP Chinese website!
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