diff --git a/src/templates/tpl1.txt b/src/templates/tpl1.txt
new file mode 100644
index 0000000..4f9f412
--- /dev/null
+++ b/src/templates/tpl1.txt
@@ -0,0 +1,20 @@
+ffmpeg -y \
+  -f image2 -loop 1 \
+  -i ${data.tts.img} \
+  ${ (data.tts.pcm.endsWith('.pcm') ? '-f s16le -ac 1 -ar 16k -i ' : '-i ') + data.tts.pcm} \
+  -t ${data.tts.duration} -f nut pipe: | \
+ffmpeg -y \
+  -i ${data.audio.path} \
+  -i pipe: ${data.videos.map(video => '  -i ' + video.path).join(' ')} \
+  -filter_complex '
+${new Array(data.videos.length + 1).fill(1)
+  .map((item, index) => "    ["+ (index + 1) + ":v]scale=720:1280[in" + (index + 1) + "]")
+  .join(";\n")
+}
+    ${
+  new Array(data.videos.length + 1).fill(1)
+    .map((item, index) => "[in" + (index + 1) + "]")
+    .join("")
+} concat=n=${ data.videos.length + 1}:v=1:a=0 [v];
+    [0:a][1:a] amix=inputs=2 [a]' \
+  -map '[v]' -map '[a]' -c:v libx264 -pix_fmt yuv420p -c:a aac -t ${data.duration} ${data.output}
\ No newline at end of file
diff --git a/src/vmTemplate.js b/src/vmTemplate.js
index fe22ada..9d94e07 100644
--- a/src/vmTemplate.js
+++ b/src/vmTemplate.js
@@ -2,7 +2,7 @@ const { NodeVM } = require('vm2')
 
 export const template = (code, options = {}) => {
   const fn = new NodeVM(options).run(
-    code.startsWith('module')
+    code.includes('module.exports')
       ? code
       : `module.exports = (data) => \`${code}\``
   )
diff --git a/src/vmTemplate.test.js b/src/vmTemplate.test.js
index e87070d..6d8b762 100644
--- a/src/vmTemplate.test.js
+++ b/src/vmTemplate.test.js
@@ -1,4 +1,6 @@
 const assert = require('power-assert')
+const fs = require('fs')
+const path = require('path')
 const { template } = require('./vmTemplate')
 
 /* eslint-env jest */
@@ -33,4 +35,41 @@ describe('vmTemplate', () => {
     ret = await fn({ timestamp })
     assert(ret === `timestamp: ${timestamp}`)
   })
+  it('code has function', async () => {
+    // eslint-disable-next-line no-template-curly-in-string
+    const fn = template('const tet = (data) => {return `timestamp: ${data.timestamp}`}; module.exports = (ctx) => `${tet(ctx)}`')
+    const timestamp = Date.now()
+    const ret = await fn({ timestamp })
+    assert(ret === `timestamp: ${timestamp}`)
+  })
+  it('template command module exports', async () => {
+    // eslint-disable-next-line no-template-curly-in-string
+    const text = 'module.exports = (data) => `ffmpeg -y -i ${data.audio.path} -i ${data.cover.path}`'
+    const fn = template(text)
+    const data = {
+      audio: {
+        path: 'audio/FoWL_zGcLjEgLC_OZrG6JhhDXsNs.mp3'
+      },
+      cover: {
+        path: 'imgs/FhbOJPU2feifsJzBGspsyASxkNy5'
+      }
+    }
+    const ret = await fn(data)
+    assert(ret === `ffmpeg -y -i ${data.audio.path} -i ${data.cover.path}`)
+  })
+  it('template command', async () => {
+    const text = fs.readFileSync(path.resolve(__dirname, './templates/tpl1.txt')).toString()
+    const fn = template(text)
+    const data = {
+      tts: { img: 'imgs/img.jpg', pcm: 'tts/wd.pcm', duration: 6 }, audio: { path: 'audio/audio.mp3' }, cover: { path: 'imgs/f.jpg' }, output: 'video/3_2019_11_15_test4.mp4', videos: [{ path: 'video/1.mp4' }, { path: 'video/2.mp4' }, { path: 'video/3.mp4' }], duration: 30
+    }
+    const ret = await fn(data)
+    assert(ret === `ffmpeg -y   -f image2 -loop 1   -i imgs/img.jpg   -f s16le -ac 1 -ar 16k -i tts/wd.pcm   -t 6 -f nut pipe: | ffmpeg -y   -i audio/audio.mp3   -i pipe:   -i video/1.mp4   -i video/2.mp4   -i video/3.mp4   -filter_complex '
+    [1:v]scale=720:1280[in1];
+    [2:v]scale=720:1280[in2];
+    [3:v]scale=720:1280[in3];
+    [4:v]scale=720:1280[in4]
+    [in1][in2][in3][in4] concat=n=4:v=1:a=0 [v];
+    [0:a][1:a] amix=inputs=2 [a]'   -map '[v]' -map '[a]' -c:v libx264 -pix_fmt yuv420p -c:a aac -t 30 video/3_2019_11_15_test4.mp4`)
+  })
 })