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    <p><strong>The command:</strong></p> <pre><code>ffmpeg –i inputvideo.avi -vf "movie=watermarklogo.png [watermark]; [in][watermark] overlay=10:10 [out]" outputvideo.flv </code></pre> <p>produces the video with the image "watermarklogo.png" in the top left hand corner. Calling this command from another program should be simple enough.</p> <p><strong>Breaking this down bit by bit to understand it:</strong></p> <p><code>ffmpeg</code> is the program you'll be using to add the watermark.</p> <p><code>-i</code> is used to specify the input files.</p> <p><code>inputvideo.avi</code> is your input file specified by <code>-i</code>.</p> <p><code>-vf</code> is used to specify the video filter. In this case, this is everything in the quotes.</p> <p><code>movie=watermarklogo.png</code> will load the file you want to use as the watermark. Here we load the file as a video source (by using <code>movie</code>) regardless of whether or not the file is an video. In this case it is an image.</p> <p><code>[watermark]</code> labels the file you just loaded. This label will be used in the rest of the code.</p> <p><code>[in]</code> and <code>[out]</code> refer to the input stream and the output stream of the video.</p> <p><code>overlay</code> is used right after the <code>[watermark]</code> label so that it refers to it. In this simple case we place the <code>overlay</code> at <code>10:10</code>. This means the watermark will be offset by 10 pixels from the top and from the left. If you wanted bottom right you would use <code>overlay=main_w-overlay_w-10:main_h-overlay_h-10</code> where <code>main_w</code> is the input stream's width, <code>overlay_h</code> is the height of the overlay file, and so on.</p> <p>Lastly, <code>outputvideo.flv</code> is clearly the file you wish to save the results to.</p> <p><strong>Additional information:</strong></p> <p>I found this information through <a href="http://www.idude.net/index.php/how-to-watermark-a-video-using-ffmpeg">the site Dmitry had mentioned</a> in the comments. Alex had mentioned that this page might be too complex for someone who's new to such things. However, I've never done anything like this and within just a couple minutes I had the results I believe are being sought.</p> <p>Note: I had a moment of trouble when I was getting the error:</p> <pre><code>error while opening encoder for output stream #0.1 </code></pre> <p>If you have the same problem you likely need to manually set the sampling frequency using the -ar parameter (e.g. -ar 22050).</p>
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    1. POFFmpeg AVFilter overlay/watermark programmatically
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    1. COCan you define timing for the watermark? lets say I want the watermark to start at 00:00 and disappear @ 01:00, is that possible?
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    2. CO@rroche Check out [this post](http://stackoverflow.com/questions/9160771/ffmpeg-watermark-first-30-second). Felix's answer is probably the simplest, but Dmitry's answer (the same Dmitry from above) is a bit neater and allows for a fade out of the watermark.
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    3. COThe question relates to using the AVFilter library, not calling the FFMPEG binary.
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