diff --git a/libs/ffmpeg/builders.js b/libs/ffmpeg/builders.js
index f5f0eab6..0f419a61 100644
--- a/libs/ffmpeg/builders.js
+++ b/libs/ffmpeg/builders.js
@@ -483,7 +483,7 @@ module.exports = (s,config,lang) => {
             const videoFilters = []
             const inputMap = buildInputMap(e,e.details.input_map_choices.stream)
             const { videoWidth, videoHeight } = validateDimensions(e.details.snap_scale_x,e.details.snap_scale_y)
-            if(inputMap)streamFlags.push(inputMap)
+            if(inputMap)videoFlags.push(inputMap)
             if(e.details.snap_vf)videoFilters.push(e.details.snap_vf)
             if(isCudaEnabled){
                 videoFilters.push('hwdownload,format=nv12')