我面临一个问题,想要杀死 FFmpeg
进程由 spawn
触发来自child_process
native NodeJs
包。
这是我用来触发 ffmpeg 进程的脚本。
假设转换需要很长时间,例如大约 2 小时。
/**
* Execute a command line cmd
* with the arguments in options given as an array of string
* processStore is an array that will store the process during its execution
* and remove it at the end of the command or when error occurs
*/
function execCommandLine({
cmd,
options = [],
processStore = [],
}) {
return new Promise((resolve, reject) => {
const spwaned_process = childProcess.spawn(cmd, options);
// Append the process to a buffer to keep track on it
processStore.push(spwaned_process);
// Do nothing about stdout
spwaned_process.stdout.on('data', () => true);
// Do nothing about stderr
spwaned_process.stderr.on('data', () => true);
spwaned_process.on('close', () => {
const index = processStore.indexOf(spwaned_process);
if (index !== -1) {
processStore.splice(index, 1);
}
resolve();
});
spwaned_process.on('error', () => {
const index = processStore.indexOf(spwaned_process);
if (index !== -1) {
processStore.splice(index, 1);
}
reject();
});
});
}
const processStore = [];
await execCommandLine({
cmd: 'ffmpeg',
options: [
'-i',
'/path/to/input',
'-c:v',
'libvpx-vp9',
'-strict',
'-2',
'-crf',
'30',
'-b:v',
'0',
'-vf',
'scale=1920:1080',
'/path/to/output',
],
processStore,
});
在转换过程中,调用以下代码来杀死 processStore
中的所有进程。 ,包括 FFmpeg
被触发的进程。
// getProcessStore() returns the const processStore array of the above script
getProcessStore().forEach(x => x.kill());
process.exit();
程序退出后,当我运行ps -ef | grep ffmpeg
时,还有一些FFmpeg
进程正在运行。
root 198 1 0 09:26 ? 00:00:00 ffmpeg -i /path/to/input -ss 00:01:47 -vframes 1 /path/to/output
root 217 1 0 09:26 ? 00:00:00 ps -ef
您知道如何正确终止 ffmpeg 进程吗?
最佳答案
如 node.js documentation 中所述subprocess.kill([signal])
中,默认发送的信号为 SIGTERM
。
Ffmpeg 不会终止接收 SIGTERM
,正如 @sashoalm 在 here 中所解释的那样.
<小时/>Newer versions of ffmpeg don't use 'q' anymore, at least on Ubuntu Oneiric, instead they say to press Ctrl+C to stop them. So with a newer version you can simply use 'killall -INT' to send them SIGINT instead of SIGTERM, and they should exit cleanly.
所以调用x.kill('SIGINT');
关于node.js - 在 NodeJs 中杀死由 spawn 触发的 FFmpeg 进程,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53428263/