added source code

Author: Alexander Richard

animate_face.py

@@ -0,0 +1,101 @@
+"""
+Copyright (c) Facebook, Inc. and its affiliates.
+All rights reserved.
+This source code is licensed under the license found in the
+LICENSE file in the root directory of this source tree.
+"""
+
+import argparse
+import numpy as np
+import torch as th
+
+from utils.renderer import Renderer
+from utils.helpers import smooth_geom, load_mask, get_template_verts, load_audio, audio_chunking
+from models.vertex_unet import VertexUnet
+from models.context_model import ContextModel
+from models.encoders import MultimodalEncoder
+
+
+parser = argparse.ArgumentParser()
+parser.add_argument("--model_dir",
+                    type=str,
+                    default="pretrained_models",
+                    help="directory containing the models to load")
+parser.add_argument("--audio_file",
+                    type=str,
+                    default="assets/example_sentence.wav",
+                    help="wave file to use for face animation"
+                    )
+parser.add_argument("--face_template",
+                    type=str,
+                    default="assets/face_template.obj",
+                    help=".obj file containing neutral template mesh"
+                    )
+parser.add_argument("--output",
+                    type=str,
+                    default="video.mp4",
+                    help="video output file"
+                    )
+args = parser.parse_args()
+
+"""
+load assets
+"""
+print("load assets...")
+template_verts = get_template_verts(args.face_template)
+audio = load_audio(args.audio_file)
+mean = th.from_numpy(np.load("assets/face_mean.npy"))
+stddev = th.from_numpy(np.load("assets/face_std.npy"))
+forehead_mask = th.from_numpy(load_mask("assets/forehead_mask.txt", dtype=np.float32)).cuda()
+neck_mask = th.from_numpy(load_mask("assets/neck_mask.txt", dtype=np.float32)).cuda()
+
+renderer = Renderer("assets/face_template.obj")
+
+"""
+load models
+"""
+print("load models...")
+geom_unet = VertexUnet(classes=128,
+                       heads=16,
+                       n_vertices=6172,
+                       mean=mean,
+                       stddev=stddev,
+                       )
+geom_unet.load(args.model_dir)
+geom_unet.cuda().eval()
+context_model = ContextModel(classes=128,
+                             heads=16,
+                             audio_dim=128
+                             )
+context_model.load(args.model_dir)
+context_model.cuda().eval()
+encoder = MultimodalEncoder(classes=128,
+                            heads=16,
+                            expression_dim=128,
+                            audio_dim=128,
+                            n_vertices=6172,
+                            mean=mean,
+                            stddev=stddev,
+                            )
+encoder.load(args.model_dir)
+encoder.cuda().eval()
+
+"""
+generate and render sequence
+"""
+print("animate face mesh...")
+# run template mesh and audio through networks
+audio = audio_chunking(audio, frame_rate=30, chunk_size=16000)
+with th.no_grad():
+    audio_enc = encoder.audio_encoder(audio.cuda().unsqueeze(0))["code"]
+    one_hot = context_model.sample(audio_enc, argmax=False)["one_hot"]
+    T = one_hot.shape[1]
+    geom = template_verts.cuda().view(1, 1, 6172, 3).expand(-1, T, -1, -1).contiguous()
+    result = geom_unet(geom, one_hot)["geom"].squeeze(0)
+# smooth results
+result = smooth_geom(result, forehead_mask)
+result = smooth_geom(result, neck_mask)
+# render sequence
+print("render...")
+renderer.to_video(result, args.audio_file, args.output)
+print("done")