I tried to record screen using ffmpeg commmand line. So, I have complete it using this commmand. ffmpeg.exe -rtbufsize 1500M -f -y -rtbufsize 100M -f gdigrab -t 00:02:00 -framerate 30 0 0 -probesize 10M 1920 1080 -draw_mouse 1 -i desktop -c:v libx264 -r 30 -preset ultrafast -tune zerolatency -crf 30 -pix_fmt yuv420p output.avi".
Now, I want to add watermark while recording video. If you have good experience this field, Please give me good advice. Thanks for your attention. Sincerely.