android - 如何在Android中捕获VideoView的屏幕截图或视频帧

Question

我尝试了此博客 (http://android-er.blogspot.kr/2013/05/get-current-frame-in-videoview-using.html) 中的以下教程，其中展示了如何使用 MediaMetadataRetriever 从视频源捕获视频帧。 但是，只有当视频位于手机本地时它才有效。

有没有办法在 VideoView 正在通过 IP 流式传输视频 时捕获视频帧？

Answer 1

Video View是SurfaceView的子类，所以Pixel Copy也可以对video View进行截图

把这个方法放在一些Util类中

/**
 * Pixel copy to copy SurfaceView/VideoView into BitMap
 */
 fun usePixelCopy(videoView: SurfaceView,  callback: (Bitmap?) -> Unit) {
    val bitmap: Bitmap = Bitmap.createBitmap(
        videoView.width,
        videoView.height,
        Bitmap.Config.ARGB_8888
    );
    try {
    // Create a handler thread to offload the processing of the image.
    val handlerThread = HandlerThread("PixelCopier");
    handlerThread.start();
    PixelCopy.request(
        videoView, bitmap,
        PixelCopy.OnPixelCopyFinishedListener { copyResult ->
            if (copyResult == PixelCopy.SUCCESS) {
                callback(bitmap)
            }
            handlerThread.quitSafely();
        },
        Handler(handlerThread.looper)
    )
    } catch (e: IllegalArgumentException) {
        callback(null)
        // PixelCopy may throw IllegalArgumentException, make sure to handle it
        e.printStackTrace()
    }
}

用法:

usePixelCopy(videoView) { bitmap: Bitmap? ->
            processBitMp(bitmap)
        }