はじまりの大地

packages/ffmpeg/src/ffmpeg-version.ts

@@ -0,0 +1,23 @@
+import { exec } from 'child_process'
+import ffmpeg from 'fluent-ffmpeg'
+
+/**
+ * @returns FFmpeg version string. Usually a semver string, but may vary when depending on installation method.
+ */
+export function getFFmpegVersion () {
+  return new Promise<string>((res, rej) => {
+    (ffmpeg() as any)._getFfmpegPath((err, ffmpegPath) => {
+      if (err) return rej(err)
+      if (!ffmpegPath) return rej(new Error('Could not find ffmpeg path'))
+
+      return exec(`${ffmpegPath} -version`, (err, stdout) => {
+        if (err) return rej(err)
+
+        const parsed = stdout.match(/(?<=ffmpeg version )[a-zA-Z\d.-]+/)
+        if (!parsed) return rej(new Error(`Could not find ffmpeg version in ${stdout}`))
+
+        res(parsed[0])
+      })
+    })
+  })
+}