1 files changed, 3 insertions, 1 deletions

diff --git a/packages/ffmpeg/src/ffmpeg-vod.ts b/packages/ffmpeg/src/ffmpeg-vod.ts
index 6dd272b8d..373dc6e81 100644
--- a/packages/ffmpeg/src/ffmpeg-vod.ts
+++ b/packages/ffmpeg/src/ffmpeg-vod.ts
@@ -102,7 +102,9 @@ export class FFmpegVOD {
 
     command.on('start', () => {
       setTimeout(() => {
-        options.inputFileMutexReleaser()
+        if (options.inputFileMutexReleaser) {
+          options.inputFileMutexReleaser()
+        }
       }, 1000)
     })