[FFmpeg-user] How to make partially transparent png image

[qw]

Hi,


In normal png file, there is no alpha channel, and there is color in the background. If there is alpha channel in png files, the background can be transparent, and the object in png file can be partially transparent.


How to make a png file with alpha channel, so that, the background is transparent and the object is partially transparent? Could ffmpeg do it?




Thanks!


B.R.


Andrew