视频未完全获取，答案

【问题标题】：video is not fetching completly,视频未完全获取，
【发布时间】：2017-12-28 10:49:20
【问题描述】：

我想从 mongodb 获取视频而不是它应该播放该视频的视频大小，但它只播放几秒钟，我给 maxUploadSize 是 20mb 和 maxInMemorySize 也是 20mb，但在 jsp 页面上，它甚至只获取 1mb 视频视频大小超过 1mb。我不知道该怎么做，视频应该根据视频大小播放完整

这里是控制器

@RequestMapping(value = "/welcome-video-controller/{videoObj}", produces = "video/webm")
@ResponseBody
public ResponseEntity<byte[]> getVideoForLoginPage(@PathVariable String videoObj, HttpServletResponse response)
        throws IOException {

    LOG.info("Entry :: getVideoForPost");
    BufferedImage bufferedVideoForPost = null;
    URL resourcePath = null;
    byte[] videoArray = null;
    ResponseEntity<byte[]> result = null;
    LOG.info("videoObj-->" + videoObj);
    File videoFromMongo = new File(VIDEO_FROM_PATH + videoObj);
    GridFSDBFile videoFile = MongoUtility.getVideoFileFromMongo(videoObj);
    videoFile.writeTo(videoFromMongo);
    bufferedVideoForPost = ImageIO.read(videoFromMongo);
    videoFile.getInputStream();
    HttpHeaders headers = new HttpHeaders();
    headers.setContentLength((int) videoFile.getLength());
    videoArray = new byte[(int) videoFile.getLength()];
    result = new ResponseEntity<byte[]>(videoArray, headers, HttpStatus.OK);
    videoFile.getInputStream().read(videoArray);
    LOG.info("videoArray-->" + videoArray);
    LOG.info("videoArray size-->" + videoArray.length);
    return result;
}

这是 html 编码

<c:set value="${videoPostDetail.videoNames}" var="videoObj" />
<c:if test="${videoObj ne ''}">
    <video width="96%" height="220" controls id="sideVideo">
          <source src='/SocialNetworkingApp/welcome-video-controller/${videoObj}.do' type='video/webm'>

    </video>
</c:if>

它应该播放完整的视频，我尝试了很多但没有任何效果，请告诉什么问题，

【问题讨论】：

标签： spring mongodb spring-mvc html5-video

【解决方案1】：

我得到了解决方案，实际上问题是块大小，我设置了文件的块大小，默认情况下块大小小于 1 mb，现在我将此行添加到代码 gfsFile.setChunkSize(uploadVideoFile.length());并且工作正常。

    public static void saveVideoIntoMongo(File uploadVideoFile, String videoFilePath, String newVideoFileName)
        throws IOException {

    LOG.info("Entry :: saveVideoIntoMongo");
    LOG.info("videoFilePath-->" + videoFilePath);
    LOG.info("newVideoFileName-->" + newVideoFileName);
    LOG.info("uploadVideoFile-->" + uploadVideoFile);

    DB db = getMongoDBInstance("videoDb");// later on take it from the properties file instead of hardcoding
    GridFS gfsPhoto = getGridFSForFiles(db, "video");

    if (!("").equals(newVideoFileName)) {
        GridFSInputFile gfsFile = gfsPhoto.createFile(uploadVideoFile);
        gfsFile.setChunkSize(uploadVideoFile.length());//setting chunkSize
        gfsFile.setFilename(newVideoFileName);
        gfsFile.save();

    }

    LOG.info("Exit :: saveVideoIntoMongo");
}

【讨论】：