fix: save_video encoding should be X264 (#188)

use X264 as the fourcc encoding

vision_agent/tools/tools.py

@@ -1069,7 +1069,7 @@ def save_video(
  ).name
 
  height, width, layers = frames[0].shape if frames else (0, 0, 0)
- fourcc = cv2.VideoWriter_fourcc(*"mp4v") # type: ignore
+ fourcc = cv2.VideoWriter_fourcc(*"X264") # type: ignore
  video = cv2.VideoWriter(output_video_path, fourcc, fps, (width, height))
  for frame in frames:
  video.write(cv2.cvtColor(frame, cv2.COLOR_RGB2BGR))