diff --git a/revid/revid.go b/revid/revid.go
index aa94daf0..94bd4a6f 100644
--- a/revid/revid.go
+++ b/revid/revid.go
@@ -428,8 +428,11 @@ func (r *Revid) Start() error {
 		return err
 	}
 
-	// Calculate delay between frames based on InputFPS.
-	d := time.Duration(1000/r.cfg.FileFPS) * time.Millisecond
+	// Calculate delay between frames based on FileFPS.
+	d := time.Duration(0)
+	if r.cfg.FileFPS != 0 {
+		d = time.Duration(1000/r.cfg.FileFPS) * time.Millisecond
+	}
 
 	r.wg.Add(1)
 	go r.processFrom(r.input, d)