| import sys |
| import numpy as np |
| import matplotlib |
| matplotlib.use("Agg") |
| import matplotlib.pyplot as plt |
| import imageio.v2 as imageio |
| npz_path, mp4_path = sys.argv[1], sys.argv[2] |
| title = sys.argv[3] if len(sys.argv) > 3 else "" |
| d = np.load(npz_path) |
| pj = d["posed_joints"] |
| T = pj.shape[0] |
| stride = max(1, T // 240) |
| idx = list(range(0, T, stride)) |
| lo = pj[idx].reshape(-1, 3).min(0); hi = pj[idx].reshape(-1, 3).max(0) |
| c = (lo + hi) / 2; r = max((hi - lo).max() / 2, 0.5) |
| pairs = [] |
| for key in ("parents", "parent", "joint_parents", "bones", "edges"): |
| if key in d.files: |
| par = np.asarray(d[key]).ravel() |
| if len(par) == pj.shape[1]: |
| pairs = [(int(p), j) for j, p in enumerate(par) if int(p) >= 0] |
| break |
| frames = [] |
| fig = plt.figure(figsize=(5, 5)) |
| for t in idx: |
| plt.clf() |
| ax = fig.add_subplot(111, projection="3d") |
| p3 = pj[t] |
| for a, b in pairs: |
| ax.plot([p3[a,0], p3[b,0]], [p3[a,1], p3[b,1]], [p3[a,2], p3[b,2]], lw=1.5) |
| ax.scatter(p3[:,0], p3[:,1], p3[:,2], s=8) |
| ax.set_xlim(c[0]-r, c[0]+r); ax.set_ylim(c[1]-r, c[1]+r); ax.set_zlim(c[2]-r, c[2]+r) |
| ax.view_init(elev=12, azim=-60) |
| ax.set_title((title[:60] + f" f{t}/{T}") if title else f"f{t}/{T}") |
| fig.canvas.draw() |
| frames.append(np.asarray(fig.canvas.buffer_rgba())[..., :3].copy()) |
| plt.close(fig) |
| imageio.mimsave(mp4_path, frames, fps=30, codec="libx264", quality=7) |
| print("preview OK:", mp4_path, len(frames), "frames") |
|
|
