Merge branch 'develop' of https://github.com/misskey-dev/misskey into develop

packages/backend/src/core/VideoProcessingService.ts

@@ -35,9 +35,8 @@ export class VideoProcessingService {
 						timestamps: ['5%'],
 					});
 			});
-	
-			// JPEGに変換 (Webpでもいいが、MastodonはWebpをサポートせず表示できなくなる)
-			return await this.imageProcessingService.convertToJpeg(`${dir}/out.png`, 498, 280);
+
+			return await this.imageProcessingService.convertToWebp(`${dir}/out.png`, 498, 280);
 		} finally {
 			cleanup();
 		}