errCode: 601errDesc: "audio export failed"errMsg: "operateMediaContainer:fail errType: 1, errCode: 601, errMsg: audio export failed" dd代码如下：                    var mc = wx.createMediaContainer();                     mc.extractDataSource({                         source: tempFilePath,                         success: (obj) => {                             console.log(obj)                             const audioTrack = obj.tracks[0];                             mc.addTrack(audioTrack); // 将视频轨道加入到待合成                             // 导出合成容器中的音频                             mc.export({                                 success: (x) => {                                     // 拿到导出之后的音频                                     console.log("导出音频：", x.tempFilePath);                                     mc.destroy();                                 },                                 fail: (x) => {                                     console.log(x)                                     console.log("导出失败");                                     mc.destroy();                                 }                             });                         },                     });

图片网址没变而图片更换了，image加载该图片也能显示新图片，但预览时还显示是老的~ 有人说预览时在图片网址后面加时间戳让其重新从服务器下载，没问题，可以显示新图片。 难道只能加时间戳重新下载吗？如果这样没有缓冲，会不会加大服务器压力？其实image 加载该图片时新图片已经下载下来了呀，谢谢大神们回答~~~