Fix OpenCV: FFMPEG: tag 0x5634504d/'MP4V' is not supported with codec id 12 and format 'mp4 / MP4 (MPEG-4 Part 14)' warning

Author: mstoelzle

examples/simulate_pendulum.py

@@ -101,7 +101,7 @@ def draw_robot(
     print("sol.ys =\n", sol.ys)
 
     # create video
-    fourcc = cv2.VideoWriter_fourcc(*"MP4V")
+    fourcc = cv2.VideoWriter_fourcc(*"mp4v")
     video_path.parent.mkdir(parents=True, exist_ok=True)
     video = cv2.VideoWriter(
         str(video_path),

examples/simulate_planar_pcs.py

@@ -158,7 +158,7 @@ def draw_robot(
     plt.show()
 
     # create video
-    fourcc = cv2.VideoWriter_fourcc(*"MP4V")
+    fourcc = cv2.VideoWriter_fourcc(*"mp4v")
     video_path.parent.mkdir(parents=True, exist_ok=True)
     video = cv2.VideoWriter(
         str(video_path),

src/jsrm/rendering/planar_hsa/opencv_renderer.py

@@ -235,7 +235,7 @@ def animate_robot(
         video_height: video height
     """
     # create video
-    fourcc = cv2.VideoWriter_fourcc(*"MP4V")
+    fourcc = cv2.VideoWriter_fourcc(*"mp4v")
     filepath.parent.mkdir(parents=True, exist_ok=True)
     video_dt = jnp.mean(video_ts[1:] - video_ts[:-1]).item()
     print(f"Rendering video with dt={video_dt} and {video_ts.shape[0]} frames")