ugoira
Ugoira is a custom animation format used by Pixiv. A Ugoira is a Zip file of images, played back using a custom Javascript player.
To upload a Ugoira to Danbooru, paste the Pixiv URL into the source field on the upload page, or upload using the bookmarklet.
To download a Ugoira from Pixiv, you can use Pixiv Toolkit or gallery-dl. Ugoiras downloaded this way can also be uploaded to Danbooru.
Technically, a Ugoira consists of Zip file containing each frame in JPEG, GIF, or PNG format, and a separate JSON file containing the delay between each frame. Since each frame has a separate delay, it's possible for a Ugoira to have a variable frame rate. Since Ugoira is a custom format used only by Pixiv, saving Ugoiras and viewing them outside of a browser can be difficult. BandiView is one image viewer that supports Ugoira.
Ugoira is often considered inferior to animations found on other sites due to Pixiv's limitations on uploading GIFs or MP4 videos. As a result, artists may convert their animations to GIFs before uploading, introducing GIF artifacts and/or color banding, and Pixiv's recompression process can introduce additional JPEG artifacts, affecting the overall quality of Ugoira animations.
Examples
另请参见
External links
- BandiView (Ugoira viewer)
This tag implicates animated (learn more).
要将 Ugoira 上传到 Danbooru，请将 Pixiv URL 粘贴到上传页面上的源字段中，或使用书签进行上传。
要从 Pixiv 下载 Ugoira，您可以使用 Pixiv Toolkit 或 gallery-dl。通过这种方式下载的 Ugoiras 也可以上传到 Danbooru。
从技术上讲，Ugoira 由 Zip 文件（包含 JPEG、GIF 或 PNG 格式的每个帧）和一个单独的 JSON 文件（包含每个帧之间的延迟）组成。由于每一帧都有单独的延迟，因此 Ugoira 可能具有可变的帧速率。由于 Ugoira 是仅 Pixiv 使用的自定义格式，因此保存 Ugoira 并在浏览器之外查看它们可能很困难。 BandiView 是一款支持 Ugoira 的图像查看器。
由于 Pixiv 对上传 GIF 或 MP4 视频的限制，Ugoira 通常被认为不如其他网站上的动画。因此，艺术家可能会在上传之前将其动画转换为 GIF，从而引入 GIF 伪影和/或色带，而 Pixiv 的重新压缩过程可能会引入额外的 JPEG 伪影，从而影响 Ugoira 动画的整体质量。