Use seven kn to turn AMR format recordings into MP3 format, prompting the file to be corrupted

刚开始用七牛，把一个amr音频转mp3，用的是php的sdk。这段程序执行完后bucket里面是有生成了999.mp3，但是下载到本地用jplayer放，提示无法解码。用firefox浏览器直接打开，提示文件已损坏。请教高手。摘选了一段主要的代码是这样的：

$auth = new Auth($accessKey, $secretKey);// 要上传的空间$bucket = 'mp3url';//执行的格式转换$pfopOps = "avthumb/mp3/ab/64k/ar/22050"; $policy = array(    'persistentOps' => $pfopOps,    'persistentNotifyUrl' => 'http://',);// 生成上传 Token$token = $auth->uploadToken($bucket);// 要上传文件的本地路径$filePath = './20150504121658533.amr';// 上传到七牛后保存的文件名$key = '999.mp3';// 初始化 UploadManager 对象并进行文件的上传。$uploadMgr = new UploadManager();list($ret, $err) = $uploadMgr->putFile($token, $key, $filePath);echo "\n====> putFile result: \n";if ($err !== null) {    var_dump($err);} else {    var_dump($ret);｝

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刚开始用七牛，把一个amr音频转mp3，用的是php的sdk。这段程序执行完后bucket里面是有生成了999.mp3，但是下载到本地用jplayer放，提示无法解码。用firefox浏览器直接打开，提示文件已损坏。请教高手。摘选了一段主要的代码是这样的：

$auth = new Auth($accessKey, $secretKey);// 要上传的空间$bucket = 'mp3url';//执行的格式转换$pfopOps = "avthumb/mp3/ab/64k/ar/22050"; $policy = array(    'persistentOps' => $pfopOps,    'persistentNotifyUrl' => 'http://',);// 生成上传 Token$token = $auth->uploadToken($bucket);// 要上传文件的本地路径$filePath = './20150504121658533.amr';// 上传到七牛后保存的文件名$key = '999.mp3';// 初始化 UploadManager 对象并进行文件的上传。$uploadMgr = new UploadManager();list($ret, $err) = $uploadMgr->putFile($token, $key, $filePath);echo "\n====> putFile result: \n";if ($err !== null) {    var_dump($err);} else {    var_dump($ret);｝

Add, my Amr file about 5kb or so, is the recording

Did you solve the problem? I've had this problem, too, begging for help.

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