I cannot show the video frame from url

[dicksonNG]

   val imageLoader = ImageLoader.Builder(view.context)
        .components {
            add(VideoFrameDecoder.Factory())
        }
        .build()
// the example url: https://www.learningcontainer.com/wp-content/uploads/2020/05/sample-mp4-file.mp4
    view.load(url,imageLoader) {
        decoderFactory { result, options, _ -> VideoFrameDecoder(result.source, options) }
        videoFrameMillis(1000)
    }

the view shows white background, but haven't shown the video frame.
Also, I found that the log error shows that getFrameAtTime: videoFrame is a NULL pointer

Is the code anything wrong?