diff --git a/lib/render_workers/ffmpeg_worker.py b/lib/render_workers/ffmpeg_worker.py
index b788e0b..04920d6 100644
--- a/lib/render_workers/ffmpeg_worker.py
+++ b/lib/render_workers/ffmpeg_worker.py
@@ -42,7 +42,7 @@ class FFMPEGRenderWorker(BaseRenderWorker):
 
         stream_info = subprocess.check_output([self.engine.renderer_path(), "-i",  # https://stackoverflow.com/a/61604105
                                                      input_path, "-map", "0:v:0", "-c", "copy", "-f", "null", "-y",
-                                                     "/dev/null"], stderr=subprocess.DEVNULL).decode('utf-8')
+                                                     "/dev/null"], stderr=subprocess.STDOUT).decode('utf-8')
         found_frames = re.findall('frame=\s*(\d+)', stream_info)
         self.total_frames = found_frames[-1] if found_frames else '-1'
         self.frame = 0