如何使用ffmpeg在视频中心添加透明水印？

Question

我目前正在使用以下命令：

Top left corner

ffmpeg –i inputvideo.avi -vf "movie=watermarklogo.png [watermark]; [in][watermark] overlay=10:10 [out]" outputvideo.flv

Top right corner

ffmpeg –i inputvideo.avi -vf "movie=watermarklogo.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:10 [out]" outputvideo.flv

Bottom left corner

ffmpeg –i inputvideo.avi -vf "movie=watermarklogo.png [watermark]; [in][watermark] overlay=10:main_h-overlay_h-10 [out]" outputvideo.flv

Bottom right corner

ffmpeg –i inputvideo.avi -vf "movie=watermarklogo.png [watermark]; [in][watermark] overlay=(main_w-overlay_w-10)/2:(main_h-overlay_h-10)/2 [out]" outputvideo.flv

如何放置视频的水印中心？

Answer 1

右下角是事实：ffmpeg –i inputvideo.avi -vf“ movie = watermarklogo.png [水印]； [in] [水印] overlay = main_w-overlay_w-10：main_h-overlay_h-10 [out]” outputvideo.flv