blocks|key|5106523|text|如果你熟悉Java，你可以用Xuggler来做这件事。特别地，MediaTool+API的教程向您展示了如何对视频进行解码和编码，以及如何使用您创建的图像从头开始制作视频。将这些概念结合起来，制作一个可以解码视频，在视频上叠加PNG，然后重新编码的程序并不难。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|5106524|entityMap|0|LINK|mutability|MUTABLE|url|http://www.xuggle.com/xuggler|1|http://wiki.xuggle.com/MediaTool_Introduction^0|E|7|0|V|9|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

If you're familiar with Java, you can do this with <a href="http://www.xuggle.com/xuggler" rel="nofollow noreferrer">Xuggler</a>. In particular the tutorials for the <a href="http://wiki.xuggle.com/MediaTool_Introduction" rel="nofollow noreferrer">MediaTool</a> API of Xuggler show you how to decode and encode a video, and separately how to make a video from scratch using images you create. It's not hard to combine those too concepts to make a program that can decode a video, overlay a PNG on the video, and then re-encode.

blocks|key|2111795|text|在java中，我们可以使用Xuggler来做到这一点。在使用IMediaTool对视频进行编码时，您将获得一系列图像。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|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2111796|BufferedImage+imageB+=+event.getImage();

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

//Create+an+alpha+composite+of+50%25
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+.........................*/|code-block|syntax|javascript|2111797|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Using Xuggler we can do this in java.
while encoding the video using IMediaTool, you will be getting sequence of images. Using these images place water mark on each of these images and generate a output video. Following is the code block

<pre><code>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 .........................*/
</code></pre>

blocks|key|206549|text|我能联系到的最好的是http://www.corbellconsulting.com/2010/07/using-ffmpeg-to-add-and-watermark-overlay-on-a-video-2/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|206550|但是，我无法让它与ffmpeg+0.6.2一起工作。|206551|祝好运。|206552|entityMap|0|LINK|mutability|MUTABLE|url|http://www.corbellconsulting.com/2010/07/using-ffmpeg-to-add-and-watermark-overlay-on-a-video-2/^0|A|2O|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

The best I could reach was <a href="http://www.corbellconsulting.com/2010/07/using-ffmpeg-to-add-and-watermark-overlay-on-a-video-2/" rel="nofollow noreferrer">http://www.corbellconsulting.com/2010/07/using-ffmpeg-to-add-and-watermark-overlay-on-a-video-2/</a>

However, I am unable to get it to work with ffmpeg 0.6.2.

Good luck.

blocks|key|206568|text|如果你从官方git资源库编译ffmpeg，你可能需要注意语法，因为它在新版本中有一些变化。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|206569|年长的|206570|ffmpeg+-i+input.mp4+-acodec+copy+-vf+"movie=0:png:watermark.png+[wm];[in][wm]+overlay=5:5:1+[out]"+-f+mp4+-b+2500k+-vcodec+libx264+-vpre+fast+-ac+1+-y+output.mp4|code-block|syntax|javascript|206571|新的|206572|ffmpeg+-i+input.mp4+-acodec+copy+-vf+"movie=watermark.png+[wm];[in][wm]+overlay=5:5+[out]"+-f+mp4+-b+2500k+-vcodec+libx264+-vpre+fast+-ac+1+-y+output.mp4|206573|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

If you compile ffmpeg from official git repository, you probably need to pay attention to the syntax because it has changed a little bit in newer versions. 

Old

<pre><code>ffmpeg -i input.mp4 -acodec copy -vf "movie=0:png:watermark.png [wm];[in][wm] overlay=5:5:1 [out]" -f mp4 -b 2500k -vcodec libx264 -vpre fast -ac 1 -y output.mp4
</code></pre>

New

<pre><code>ffmpeg -i input.mp4 -acodec copy -vf "movie=watermark.png [wm];[in][wm] overlay=5:5 [out]" -f mp4 -b 2500k -vcodec libx264 -vpre fast -ac 1 -y output.mp4
</code></pre>

Since the vhook subsystem has been removed from the latest version of FFMPEG, how can I add a watermark to a video?

I need to be able to overlay a PNG with background transparency.

ffmpeg watermark without vhook?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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由于vhook子系统已经从最新版本的FFMPEG中移除，如何在视频中添加水印？我需要能够覆盖一个背景透明的PNG。

问没有vhook的ffmpeg水印？
EN

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问没有vhook的ffmpeg水印？EN