没有vhook的ffmpeg水印？ [复制]

由于 vhook 子系统已从最新版本的 FFMPEG 中删除，如何为视频添加水印？

我需要能够覆盖具有背景透明度的 PNG。

使用 Xuggler 我们可以在 java 中做到这一点。 使用 IMediaTool 编码视频时，您将获得图像序列。使用这些图像在每个图像上放置水印并生成输出视频。以下是代码块

BufferedImage imageB = event.getImage();

/*....................... water mark .........................*/
Graphics2D g2d = (Graphics2D) imageB.getGraphics();
g2d.drawImage(imageB, 0, 0, null);

//Create an alpha composite of 50%
AlphaComposite alpha = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1.0f);
g2d.setComposite(alpha); 

g2d.setColor(Color.YELLOW);


g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
RenderingHints.VALUE_TEXT_ANTIALIAS_ON);

g2d.setFont(new Font("Arial", Font.BOLD, 30));

String watermark = "Sample water mark";

FontMetrics fontMetrics = g2d.getFontMetrics();
Rectangle2D rect = fontMetrics.getStringBounds(watermark, g2d);
yScrolling = imageB.getHeight() - (int) rect.getHeight() / 2;

g2d.drawString(watermark, (imageB.getWidth() - (int) rect.getWidth()) / 2,
                         (imageB.getHeight() - (int) rect.getHeight()) / 2);
g2d.drawString(watermark, xScrolling,yScrolling);

//Free graphic resources
g2d.dispose(); 

 /*....................... water mark .........................*/