随笔-ffmpeg ffplay

linux下播放alaw文件：

xfile=poweroff.alaw ;timeout 5 ffplay -i $xfile -f alaw -ac 1 -ar 8000
for xfile in $(ls *.alaw);do sleep 1s; echo $xfile;timeout 5 ffplay -i $xfile -f alaw -ac 1 -ar 8000; done

ffmpeg -i not-during-worktime.mp3 -ar 16000 -acodec g722 1.g722

附：安装ffmpeg

https://www.deb-multimedia.org/

1. install deb-multimedia-keyring

wget https://www.deb-multimedia.org/pool/main/d/deb-multimedia-keyring/deb-multimedia-keyring_2024.9.1_all.deb
sudo dpkg -i deb-multimedia-keyring_2024.9.1_all.deb

2. add /etc/apt/sources.list.d/dmo.sources

Types: deb
URIs: https://www.deb-multimedia.org
Suites: trixie
Components: main non-free
Signed-By: /usr/share/keyrings/deb-multimedia-keyring.pgp
Enabled: yes

可以该其他mirror Deb Multimedia Packages::DMO::Mirrors::Stable

URIs: https://mirrors.tuna.tsinghua.edu.cn/debian-multimedia