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demo_video.py
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demo_video.py
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"""
Runs hmmr on a video.
Extracts tracks using AlphaPose/PoseFlow
Sample Usage:
python -m demo_video --out_dir demo_data/output
python -m demo_video --out_dir demo_data/output270k --load_path models/hmmr_model.ckpt-2699068
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from glob import glob
import json
import os.path as osp
import pickle
import re
from absl import flags
import ipdb
import numpy as np
from extract_tracks import compute_tracks
from src.config import get_config
from src.evaluation.run_video import (
process_image,
render_preds,
)
from src.evaluation.tester import Tester
from src.util.common import mkdir
from src.util.smooth_bbox import get_smooth_bbox_params
flags.DEFINE_string(
'vid_path', 'penn_action-2278.mp4',
'video to run on')
flags.DEFINE_integer(
'track_id', 0,
'PoseFlow generates a track for each detected person. This determines which'
' track index to use if using vid_path.'
)
flags.DEFINE_string('vid_dir', None, 'If set, runs on all video in directory.')
flags.DEFINE_string('out_dir', 'demo_output/',
'Where to save final HMMR results.')
flags.DEFINE_string('track_dir', 'demo_output/',
'Where to save intermediate tracking results.')
flags.DEFINE_string('pred_mode', 'pred',
'Which prediction track to use (Only pred supported now).')
flags.DEFINE_string('mesh_color', 'blue', 'Color of mesh.')
flags.DEFINE_integer(
'sequence_length', 20,
'Length of sequence during prediction. Larger will be faster for longer '
'videos but use more memory.'
)
flags.DEFINE_boolean(
'trim', False,
'If True, trims the first and last couple of frames for which the temporal'
'encoder doesn\'t see full fov.'
)
def get_labels_poseflow(json_path, num_frames, min_kp_count=20):
"""
Returns the poses for each person tracklet.
Each pose has dimension num_kp x 3 (x,y,vis) if the person is visible in the
current frame. Otherwise, the pose will be None.
Args:
json_path (str): Path to the json output from AlphaPose/PoseTrack.
num_frames (int): Number of frames.
min_kp_count (int): Minimum threshold length for a tracklet.
Returns:
List of length num_people. Each element in the list is another list of
length num_frames containing the poses for each person.
"""
with open(json_path, 'r') as f:
data = json.load(f)
if len(data.keys()) != num_frames:
print('Not all frames have people detected in it.')
frame_ids = [int(re.findall(r'\d+', img_name)[0])
for img_name in sorted(data.keys())]
if frame_ids[0] != 0:
print('PoseFlow did not find people in the first frame. '
'Needs testing.')
ipdb.set_trace()
all_kps_dict = {}
all_kps_count = {}
for i, key in enumerate(sorted(data.keys())):
# People who are visible in this frame.
track_ids = []
for person in data[key]:
kps = np.array(person['keypoints']).reshape(-1, 3)
idx = int(person['idx'])
if idx not in all_kps_dict.keys():
# If this is the first time, fill up until now with None
all_kps_dict[idx] = [None] * i
all_kps_count[idx] = 0
# Save these kps.
all_kps_dict[idx].append(kps)
track_ids.append(idx)
all_kps_count[idx] += 1
# If any person seen in the past is missing in this frame, add None.
for idx in set(all_kps_dict.keys()).difference(track_ids):
all_kps_dict[idx].append(None)
all_kps_list = []
all_counts_list = []
for k in all_kps_dict:
if all_kps_count[k] >= min_kp_count:
all_kps_list.append(all_kps_dict[k])
all_counts_list.append(all_kps_count[k])
# Sort it by the length so longest is first:
sort_idx = np.argsort(all_counts_list)[::-1]
all_kps_list_sorted = []
for sort_id in sort_idx:
all_kps_list_sorted.append(all_kps_list[sort_id])
return all_kps_list_sorted
def predict_on_tracks(model, img_dir, poseflow_path, output_path, track_id,
trim_length):
# Get all the images
im_paths = sorted(glob(osp.join(img_dir, '*.png')))
all_kps = get_labels_poseflow(poseflow_path, len(im_paths))
# Here we set which track to use.
track_id = min(track_id, len(all_kps) - 1)
print('Total number of PoseFlow tracks:', len(all_kps))
print('Processing track_id:', track_id)
kps = all_kps[track_id]
bbox_params_smooth, s, e = get_smooth_bbox_params(kps, vis_thresh=0.1)
images = []
images_orig = []
min_f = max(s, 0)
max_f = min(e, len(kps))
print('----------')
print('Preprocessing frames.')
print('----------')
for i in range(min_f, max_f):
proc_params = process_image(
im_path=im_paths[i],
bbox_param=bbox_params_smooth[i],
)
images.append(proc_params.pop('image'))
images_orig.append(proc_params)
if track_id > 0:
output_path += '_{}'.format(track_id)
mkdir(output_path)
pred_path = osp.join(output_path, 'hmmr_output.pkl')
if osp.exists(pred_path):
print('----------')
print('Loading pre-computed prediction.')
print('----------')
with open(pred_path, 'rb') as f:
preds = pickle.load(f)
else:
print('----------')
print('Running prediction.')
print('----------')
preds = model.predict_all_images(images)
with open(pred_path, 'wb') as f:
print('Saving prediction results to', pred_path)
pickle.dump(preds, f)
if trim_length > 0:
output_path += '_trim'
print('----------')
print('Rendering results to {}.'.format(output_path))
print('----------')
render_preds(
output_path=output_path,
config=config,
preds=preds,
images=images,
images_orig=images_orig,
trim_length=trim_length,
)
def run_on_video(model, vid_path, trim_length):
"""
Main driver.
First extracts alphapose/posetrack in track_dir
Then runs HMMR.
"""
print('----------')
print('Computing tracks on {}.'.format(vid_path))
print('----------')
# See extract_tracks.py
poseflow_path, img_dir = compute_tracks(vid_path, config.track_dir)
vid_name = osp.basename(vid_path).split('.')[0]
out_dir = osp.join(config.out_dir, vid_name, 'hmmr_output')
predict_on_tracks(
model=model,
img_dir=img_dir,
poseflow_path=poseflow_path,
output_path=out_dir,
track_id=config.track_id,
trim_length=trim_length
)
def main(model):
# Make output directory.
mkdir(config.out_dir)
if config.trim:
trim_length = model.fov // 2
else:
trim_length = 0
if config.vid_dir:
vid_paths = sorted(glob(config.vid_dir + '/*.mp4'))
for vid_path in vid_paths:
run_on_video(model, vid_path, trim_length)
else:
run_on_video(model, config.vid_path, trim_length)
if __name__ == '__main__':
config = get_config()
# Set up model:
model_hmmr = Tester(
config,
pretrained_resnet_path='models/hmr_noS5.ckpt-642561'
)
main(model_hmmr)