请点击这里购买继续学习！ 请点击这里购买继续学习！ [err01_错误代码-2147012796_描述在 Open 方法被调用之前不能调用此方法 -http://vod.cn-shanghai.aliyuncs.com?AccessKeyId=LTAI5tGgt2rwsmnbKW3udECw&Action=GetVideoPlayAuth&Format=xml&SignatureMethod=HMAC-SHA1&SignatureNonce=5246324DB91749C6874C6D81EF633694&SignatureVersion=2.0&Version=2017-03-21&VideoId=91d8a25ec8754fd39757a3aeb40ce258&timeStamp=2025-10-19T21%3A38%3A52Z&Signature=jwyrdJ4Vooi8%2FeXMetNrNP3QC5Y%3D|]