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 —
Author: linux
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
pactl list
pactl list | grep -A2 ‘Source’ Monitor Source: alsa_output.pci-0000_00_1b.0.analog-stereo.monitor Latency: 0 usec, configured 0 usec Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY — Source #1 State: SUSPENDED Name: alsa_output.pci-0000_00_1b.0.analog-stereo.monitor — Source #2 State: SUSPENDED Name: alsa_input.pci-0000_00_1b.0.analog-stereo —————————- pactl list | grep ‘Source’ Monitor Source: alsa_output.pci-0000_00_1b.0.analog-stereo.monitor Monitor Source: bluez_sink.41_42_FF_28_DF_E0.a2dp_sink.monitor Source #0 Source #100
firewall-cmd
root@115:~# firewall-cmd –list-ports 20/tcp 21/tcp 22/tcp 80/tcp 443/tcp 39000-40000/tcp root@115:~# firewall-cmd –remove-port=39000-40000/tcp –permanent success