set ffmpeg and ffprobe paths via environment variables

ffmpeg.js

@@ -1,27 +1,24 @@
 const ffmpeg = require('fluent-ffmpeg')
 
-/**
- * Static `ffmpeg(1)` binary path.
- * @public
- */
-//const { FFPROBE_BIN_PATH = require('ffmpeg-ffprobe-static').ffprobePath } = process.env
+const { FFMPEG_BIN_PATH, FFPROBE_BIN_PATH } = process.env
 
-/**
- * Static `ffprobe(1)` binary path.
- * @public
- */
-//const { FFMPEG_BIN_PATH = require('ffmpeg-static') } = process.env
+if (FFMPEG_BIN_PATH) {
+  ffmpeg.setFfmpegPath(FFMPEG_BIN_PATH)
+}
+
+if (FFPROBE_BIN_PATH) {
+  ffmpeg.setFfprobePath(FFPROBE_BIN_PATH)
+}
 
 // initial configuration for `ffmpeg` and `ffprobe` binary paths
 // consumers of `fluent-ffmpeg` can overload the path on their own
-// ffmpeg.setFfmpegPath('/usr/bin/ffmpeg')
 // ffmpeg.setFfprobePath('/usr/bin/ffprobe')
 
 /**
  * Module exports.
  */
 module.exports = {
-//  FFPROBE_BIN_PATH,
-//  FFMPEG_BIN_PATH,
+  FFPROBE_BIN_PATH,
+  FFMPEG_BIN_PATH,
   ffmpeg
 }