FFmpeg旋转并缩放视频上的图像叠加

Question

I have been able to rotate image which overlays on video on android using this comand

String[] complexCommand2 = {"-y", "-i", videoFilePath, "-i", imagepath, "-filter_complex","[1:v] rotate=30*PI/180:c=none:ow=rotw(iw):oh=roth(ih) [rotate];[0:v][rotate] overlay=40:10",  "-codec:a","copy", outputFilePath};

However I want to also scale the image how can that be done

Answer 1

To scale after the rotate: (just replaced and with desired values.

-filter_complex "[1:v] rotate=30*PI/180:c=none:ow=rotw(iw):oh=roth(ih) [rotate];[rotate]scale=<scale_width>:<scale_height>[scale];[0:v][scale] overlay=40:10[out]" -map [out] .......

to scale before the rotate: (just replaced and with desired values.

-filter_complex "[1:v]scale=<scale_width>:<scale_height>[scale];[scale]rotate=30*PI/180:c=none:ow=rotw(iw):oh=roth(ih) [rotate];[0:v][rotate] overlay=40:10[out]" -map [out] .......