Cause I know taht there is no option to export the whole animation in mp4, can you recommend some free softwares to make animation from png files?
(It's important to me to make background stay transparent and my software - davinci resolve doesn't make it possible)
ffmpeg ? Certainly free and it can make movies from images. Don’t know if would preserve transparency but easy enough to try; possibly there’s an option for it.
Not many video formats support alpha channel, h264 doesn't if you are using this.