diff --git a/libs/ffmpeg.js b/libs/ffmpeg.js
index 33c901ee..11245132 100644
--- a/libs/ffmpeg.js
+++ b/libs/ffmpeg.js
@@ -424,7 +424,7 @@ module.exports = function(s,config,lang,onFinish){
         x.hwaccel = ''
         x.cust_input = ''
         //wallclock fix for strangely long, single frame videos
-        if(e.details.wall_clock_timestamp_ignore !== '1' && e.type === 'h264' && x.cust_input.indexOf('-use_wallclock_as_timestamps 1') === -1){x.cust_input+=' -use_wallclock_as_timestamps 1';}
+        if((config.wallClockTimestampAsDefault || e.details.wall_clock_timestamp_ignore !== '1') && e.type === 'h264' && x.cust_input.indexOf('-use_wallclock_as_timestamps 1') === -1){x.cust_input+=' -use_wallclock_as_timestamps 1';}
         //input - frame rate (capture rate)
         if(e.details.sfps && e.details.sfps!==''){x.input_fps=' -r '+e.details.sfps}else{x.input_fps=''}
         //input - analyze duration