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

[Mark Himsley]

On 09/12/2011 23:18, Clément Bœsch wrote:
> On Fri, Dec 09, 2011 at 11:48:05PM +0200, demimurych wrote:
>> 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.
>>
>
> Maybe you could generate a 10 seconds video with your source image, and
> use it as overlay?

Or better still, use a fade filter to fade the overlay out after 10 seconds.

Or even better, use two fade filters, one to fade the watermark in and 
another to fade it out again.

-- 
Mark