[FFmpeg-user] Could ffmpeg add fade effect for watermarkpicture?
377307289 at qq.com
Mon May 25 08:50:10 CEST 2015
It's very helpful. thanks a lot!
------------------ Original ------------------
From: "Moritz Barsnick";<barsnick at gmx.net>;
Date: Thu, May 21, 2015 05:23 PM
To: "FFmpeg user discussions"<ffmpeg-user at ffmpeg.org>;
Subject: Re: [FFmpeg-user] Could ffmpeg add fade effect for watermarkpicture?
On Thu, May 21, 2015 at 10:59:06 +0800, Nemo wrote:
> I means, increase or reduce the watermark transparency.
> Thanks a lot.
Let me google that for you.
This shows some way how to do it, keywords to read are timeline editing
and fade filter:
I believe this answer in that thread should give you a good solution:
I one elegant step, using "-loop 1" to make a pseudo video from the
overlay image, and using the fade filter in a "-filter_complex" chain
to mainpulate the overlay.
In other words:
$ ffmpeg -i inputvideo loop 1 -i watermark.png -c:a copy -filter_complex "[1:v]fade=in:st=0:d=0.5,fade=out:st=30:d=0.5[watermark]; [0:v][watermark]overlay=10:main_h-overlay_h-10" outputvideo
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