#ffmpeg -i 20251018_1519.mp4 -vf crop=900:900:0:10 -f mp4 20251018_1519_0.mp4
#ffmpeg -i 20251018_1519.mp4 -vf crop=640:480:950:50 -an -f mp4 20251018_1519_1.mp4
#左上角
#ffmpeg -i test.mp4 -i logo.png -filter_complex overlay test-overlay.mp4
#右上角
#ffmpeg -i test.mp4 -i logo.png -filter_complex overlay=W-w test-overlay.mp4
#左下角
#ffmpeg -i test.mp4 -i logo.png -filter_complex overlay=0:H-h test-overlay.mp4
#右下角
#ffmpeg -i test.mp4 -i logo.png -filter_complex overlay=W-w:H-h test-overlay.mp4
#ffplay -i 20251018_1519_0.mp4 -vf 'movie=filename=20251018_1519_1.mp4,scale=w=iw/2:h=ih/2[watermarker];[in][watermarker]overlay=x=600:y=0'
#图片水印
DATE=$(date +"%Y-%m-%d")
TIME=$(date +"%H-%M-%S")
ffmpeg -i 20251018_1519_0.mp4 -vf 'movie=filename=20251018_1519_1.mp4,scale=w=iw/2:h=ih/2[watermarker];[in][watermarker]overlay=W-w' -f mp4 watermarker_${DATE}_${TIME}.mp4