ffmpeg -f x11grab -video_size 1132×791 -r 1 -t 00:00:10 -i :0.0+2,289 -f image2 %d_window.jpg
Category: ffmpeg
ffmpeg-volume
ffmpeg -i test.mp3 -af volume=0.5 ff_volume.mp3
ffmpeg-vframes
ffmpeg -i test.mp4 -ss 00:00:10 -vframes 1 ff_capture.png
ffmpeg-unsharp
ffmpeg -i fuzhous.mp4 -vf unsharp=luma_amount=3 ff_unsharp.mp4
ffmpeg-university
ffmpeg -f x11grab -framerate 25 -video_size 1920×880 -i :0.0+0,200 -vf ‘setpts=(RTCTIME-RTCSTART)/(TB*1000000)’ -af asetpts=N/SR/TB,apad -shortest -c:v libx264 -profile:v high444 -preset:v veryfast -qp:v 0 -pix_fmt yuv444p -c:a mp3 -strict -2 -t 00:20:45 -f mp4 01议论文单元.mp4 -y -f pulse -i “alsa_output.pci-0000_00_1b.0.analog-stereo.monitor” -t 00:20:45 -f mp3 01议论文单元.mp3 -y -t 00:20:45 -r 1/1 -f image2 cctv/01议论文单元-%d.jpg -y exit