ffmpeg水印与叠加不适用于GIF

I am using ffmpeg for adding a watermark to my MP4 video.

With this code :

ffmpeg -i video.mp4 -i watermark.png -filter_complex "[0][1]overlay=15:H-80" output.mp4

It does work for adding a png image to video ,

But when i use it for adding a gif to my video, i do not see any watermark on the output

Like this :

ffmpeg -i video.mp4 -i watermark.gif -filter_complex "[0][1]overlay=15:H-80" output.mp4

Is there anything wrong with my code?


I just need to add an animated gif to bottom left of my video! that's all i need, if you have better code please share. i'm newbie.