[FFmpeg-user] lbavfilter. watermark. time interval.

[demimurych]

Hello.

I'm currently working with libavfilter and have a question relating watermarks. 

What I already know is how to put a watermark on a whole video clip. 
ffmpeg  -i inputfile   -vf "movie=650_360_net.png [logo]; [in][logo] overlay=W-
w-20:H-h-20 [out]"  outpufile

What I'm trying to achieve is to place a watermark that would only be visible 
from some certain point and to some point - for example, only the first 10 
seconds of the video clip. 

If there's a workaround that can make it possible please let me know. I'm 
stuck on this issue right now so I would be glad to receive an answer. 

Thanks in advance.

Best regards,
Max