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: http://stackoverflow.com/questions/9160771/ffmpeg-watermark-first-30-second I believe this answer in that thread should give you a good solution: http://stackoverflow.com/a/24024776 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 Cheers, Moritz _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
