1.我用手机拍了一段视频是竖屏，上传到七牛2.查看元信息发现"width": 640,"height": 480 但我期望是 width:480 ,height:640 因为元信息没有找到具体的字段说明，也没搞明白关于横屏和竖屏是否有自动处理，这个关系到转码时候的分辨率，请帮忙解决一下。
After uploading the file, you can use url?avinfo to query the meta information of the audio and video, and the transcoding will be performed based on this result.
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After uploading the file, you can use url?avinfo to query the meta information of the audio and video, and the transcoding will be performed based on this result.