mui使用plus.uploader.createUpload上传视频报错：Uncaught SyntaxError: Unexpected token h in JSON at position 0

使用plus.uploader.createUpload上传视频报错：Uncaught SyntaxError: Unexpected token h in JSON at position 0 at home/clock-the-editor.html:1

上传几秒钟的视频可以正常上传，但是上传10秒以上的视频就会报Uncaught SyntaxError: Unexpected token h in JSON at position 0 at home/clock-the-editor.html:1，

//视频录制  
function VideoRecording(){  
    var cmr = plus.camera.getCamera();  
    var res = cmr.supportedVideoResolutions[0];  
    var fmt = cmr.supportedVideoFormats[0];  
    cmr.startVideoCapture( function( path ){  
            videotag=1;  
            plus.nativeUI.showWaiting("上传中...");  
            createUpload(path); //上传视频  
        },  
        function( error ) {  
            //console.log( "视频录制出错failed: "   error.message );  
        },  
        {resolution:res,format:fmt}  
    );  
}  
//从相册中选择视频  
function videoFromCamera(){  
    plus.gallery.pick( function(path){  
            videotag=2;  
            plus.nativeUI.showWaiting("上传中...");  
            createUpload(path);  //上传视频  
    }, function ( e ) {  
            console.log( "取消选择视频" );  
    }, {filter:"video"} );  
}  

// 创建上传任务（图片裁剪）  
function createUpload(path) { //path是  
    if(isChinese(path) == true){  
        plus.nativeUI.alert("资源路径含有特殊字符");  
        plus.nativeUI.closeWaiting();  
        return;  
    }  
    var task = plus.uploader.createUpload(urlHead   "uploadProof", {  
            method: "POST",  
            blocksize: 204800,  
            priority: 100  
        },  
        function(data, status) {  
            data = JSON.parse(data.responseText);  
            // 上传完成  
            plus.nativeUI.closeWaiting();  
            if(status == 200) {  
                if(data['code'] !== 0) {  
                    plus.nativeUI.alert(data['msg']);  
                    return;  
                }  
                var dic=data["data"];  

                if(pictag == 2||pictag == 1){  
                    //数组  
                    showPicPath=data["data"]["showPicPath"];  
                    createImg(showPicPath);  
                    pictag=0;  
                }  

                if(voicetag == 1){  
                    //音频  
                    voiceduration=dic["duration"];  
                    voicePath=dic["showPicPath"];  
                    document.getElementById("upvoice").style.display="none";  
                    createVoice(voicePath);  
                    voicetag=0;  
                }  

                if(videotag == 1||videotag == 2){  
                    //视频封面  
                    coverUrl=dic["coverUrl"];  
                    showCoverUrl=dic["showCoverUrl"];//视频播放地址  
                    //视频长度  
                    videoduration=dic["duration"];  
                    //视频地址  
                    videoPath=dic["showPicPath"];  
                    document.getElementById("upvideo").style.display="none";  
                    createVideo();  
                    videotag=0;  
                }  
                var that = this;      
            } else {  
                plus.nativeUI.closeWaiting();  
                plus.nativeUI.alert("Upload failed: "   status);  
            }  
        }  
    );  
    task.addFile(path, {  
        key: "fileList"  
    });  
    task.start();  
}