调整预览图精度bug

packages/artplayer-tool-thumbnail/src/index.js

@@ -164,11 +164,12 @@ class ArtplayerToolThumbnail extends Emitter {
         const { number, width, height, column } = this.option;
         const { duration } = this.video;
         const timeGap = duration / number;
-        const timePoints = [0];
+        const timePoints = [timeGap];
         while (timePoints.length < number) {
             const last = timePoints[timePoints.length - 1];
             timePoints.push(last + timeGap);
         }
+        console.log(timePoints);
         return timePoints.map((item, index) => ({
             time: item - timeGap / 2,
             x: (index % column) * width,

packages/artplayer/src/controls/thumbnails.js

@@ -17,7 +17,7 @@ export default function thumbnails(controlOption) {
                 const { width: posWidth } = getPosFromEvent(art, event);
                 const { url, height, width, number, column } = art.option.thumbnails;
                 const perWidth = $progress.clientWidth / number;
-                const perIndex = Math.ceil(posWidth / perWidth);
+                const perIndex = Math.floor(posWidth / perWidth);
                 const yIndex = Math.ceil(perIndex / column) - 1;
                 const xIndex = perIndex % column || column - 1;
                 setStyle($control, 'backgroundImage', `url(${url})`);