Update rust_highlight/src/lib.rs

rust_highlight/src/lib.rs

@@ -15,13 +15,15 @@ fn render_video(
     let mut vf = String::new();
     let n = words.len() as f64;
     for (i, (_, (x, y, w, h))) in words.iter().enumerate() {
-        let start = (i as f64) * (duration.parse::<f64>().unwrap() / n);
-        let end = start + (duration.parse::<f64>().unwrap() / n);
+        let word_duration = duration.parse::<f64>().unwrap() / n;
+        let start = (i as f64) * word_duration;
+        let end = start + word_duration;
+
         vf.push_str(&format!(
-            "drawbox=x={}:y={}:w={}:h={}:color=yellow@0.5:enable='between(t,{:.3},{:.3})',",
-            x, y, w, h, start, end
-        ));
-    }
+        "drawbox=x={}:y={}:w={}:h={}:color=yellow@0.0:t=fill:enable='between(t,{:.3},{:.3})',",
+        x, y, w, h, start, end
+    ));
+}
     vf = vf.trim_end_matches(',').to_string();
 
     let status = Command::new("ffmpeg")