无法播放从android上传到node.js服务器的音频文件

Question

我尝试将音频文件从android上传到node.js服务器，但不幸的是，在服务器上传的文件没有播放。它在VLC媒体播放器中播放时显示错误“没有合适的解码器模块：VLC不支持音频或视频格式'samr'。”

这是我的Android代码：

                String name = aurl[0];
                String groupid = aurl[0];
                File file = new File(aurl[1]);
                //ByteArrayBody byteArrayBody = new ByteArrayBody(audioData, name);
                MultipartEntity multipartEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
                //multipartEntity.addPart("uploadDocument", byteArrayBody);
                ContentBody cb = new FileBody(file,"video/mp4");
                multipartEntity.addPart("uploadDocument",cb);
                HttpClient httpClient = new DefaultHttpClient();
                System.out.println("Befor Call ...................................");
                String requestUri = Constants.URI_SERVER + "/upload/"+ groupid +"/FromAndroidkycUploadingAudio";
                HttpPost httpPost = new HttpPost(requestUri);
                httpPost.setEntity(multipartEntity);

                Header header = new BasicHeader(Constants.FIELD_REQUEST_SOURCE, Constants.FIELD_ANDROID);
                httpPost.addHeader(header);

                HttpResponse httpResponse = httpClient.execute(httpPost);

                if(httpResponse.getStatusLine().getStatusCode() == 200) { 
                    toastMsg = Constants.MSG_UPLOAD_SUCCESS;
                } else {
                    toastMsg = Constants.MSG_UPLOAD_FAILURE;
                }

我的服务器端Node.js代码：

            var fs1=require('fs');
            var util = require('util');
            var is = fs1.createReadStream(req.files.uploadDocument.path)
            var os = fs1.createWriteStream("client_documents/"+"Audio1"+".mp4");
                util.pump(is, os, function() {
                        //fs1.unlinkSync(req.files.uploadDocument.path);
                        console.log('It\'s moved!');
                    });

请建议我任何解决方案......