ffmpeg version 4.4.2-1 Copyright (c) 2000-2021 the FFmpeg developers built with gcc 8 (Uos 8.3.0.3-3+rebuild) configuration: –prefix=/usr –extra-version=1 –toolchain=hardened –libdir=/usr/lib/x86_64-linux-gnu —
post
ffmpeg-filter_complex
#ffmpeg -i bg.jpg -i 0-5-eq.jpg -filter_complex “[1:v] scale=552:23[logo];[0:v][logo]overlay=x=3:y=0” bg-0-5.jpg && #ffmpeg -i bg-2-0-5.jpg -vf “eq=contrast=2” -f image2 bg-2-0-5-eq.jpg && ffmpeg -i ffmpeg-A4.jpg -i ffmpeg-A4-25×30.jpg -filter_complex “[1:v] scale=558:781[logo];[0:v][logo]overlay=x=18:y=30” ffmpeg-A4-25×30-0.jpg && ffmpeg -i ffmpeg-A4-25×30-0.jpg -vf “eq=contrast=2” -f image2 ffmpeg-A4-25×30-true.jpg && exit ffmpeg -i test_0.mp3 -i test_1.mp3 -filter_complex “[0:a]aresample=44100,aformat=fltp[a1];[1:a]aresample=44100,aformat=fltp,volume=1[a2];[a1][a2]amix” ff_amix.mp3 ffmpeg -i test.mp4 -i ship.mp3 “[0:a]aresample=44100,aformat=fltp[a1];[1:a]aresample=44100, aformat=fltp,volume=0.5[a2];[a1][a2]amix” ff_amix.mp4
ffmpeg -h filter=blend
ffmpeg version 4.4.2-1 Copyright (c) 2000-2021 the FFmpeg developers built with gcc 8 (Uos 8.3.0.3-3+rebuild) configuration: –prefix=/usr –extra-version=1 –toolchain=hardened –libdir=/usr/lib/x86_64-linux-gnu —
ffmpeg_notepad
ffmpeg -i test.mp3 -af atempo=2 ff_atempo.mp3 ffmpeg -i test.mp3 -af atrim=start=30:end=50 ff_atrim.mp3 ffmpeg -i fuzhous.mp4 -i seas.mp4 -filter_complex “[0:v]fps=25[v0];[1:v]fps=25[v1];[v0][v1]blend=all_mode=average” ff_blend.mp4
screen
screen的作用是建立新的进程，关闭当前窗口，程序继续执行。非常适用于linux远程 root115@115:~/Downloads$ ls -lth total 8.8G -rw-r–r– 1 root root 4.6G Mar 30 15:22 CentOS-Stream-10-latest-x86_64-dvd1.iso -rw-r–r– 1 root115 root115 240 Mar 30 09:15 wget -rw-r–r– 1 root root 819M Mar 24 12:20 CentOS-Stream-10-latest-x86_64-boot.iso root115@115:~/Downloads$ screen -ls //列出进程 There is a screen on: 2382.wget (Detached) 1 Socket in /home/root115/.screen. root115@115:~/Downloads$ screen -r 2382 //查看进程 root115@115:~/Downloads$ screen… Continue reading screen