Placing logo on video

It's really great to be able to add logo on your video. Here's a simple guide how to do that with ffmpeg and set up nginx-rtmp to add logo automatically.

Here's a simple mychan.png logo with transparent background made in GIMP.


What we want is to add logo on video that goes through nginx-rtmp. That can be done with the following ffmpeg overlay filter.

movie=/var/pictures/mychan.png[logo];[0][logo]overlay=0:70

Let's create a new application addlogo and add ffmpeg exec line to it. The result is published to myapp.

application myapp {
    live on;
}

application addlogo{
    live on;
    exec ffmpeg -i rtmp://localhost/addlogo/$name 
         -vf "movie=/var/pictures/mychan.png[logo];[0][logo]overlay=0:70" 
         -c:v flv -f flv rtmp://localhost/myapp/$name;
}

Now start streaming sintel.

ffmpeg -re -i /var/video/sintel.mp4 -c:v flv -s 800x600 -c:a libfaac -ar 44100 -ac 1
       -f flv rtmp://localhost/addlogo/mystream

Here's the result.