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'''
Usage:
python scripts/tools/extract_centerframe.py \
--p_video assets/Samples/tshirtman.mp4 \
--p_save outputs/centerframe/tshirtman.png \
--orifps 18 \
--targetfps 6 \
--n_keyframes 17 \
--length_long 512 \
--length_short 512
'''
import argparse
import json
import os
import random
import einops
import torchvision
import cv2
import numpy as np
import torch
from pytorch_lightning import seed_everything
from torch import autocast
from scripts.sampling.util import (
chunk,
create_model,
init_sampling,
load_video,
load_video_keyframes,
model_load_ckpt,
perform_save_locally_image,
perform_save_locally_video,
)
from sgm.util import append_dims
def extract_centerframe(p_video, p_save, orifps, targetfps, n_keyframes, length_long, length_short):
if n_keyframes % 2 == 0:
print('WARNING: n_keyframes should be odd, but got {}'.format(n_keyframes))
keyframes = load_video_keyframes(p_video, orifps, targetfps, n_keyframes)
H, W = keyframes[0].shape[1:]
if H >= W:
h, w = length_long, length_short
else:
h, w = length_short, length_long
# keyframes = load_video_keyframes(p_video, orifps, targetfps, n_keyframes, (h, w))
centerframe = keyframes[n_keyframes // 2, :, :, :].unsqueeze(0)
centerframe = torch.nn.functional.interpolate(centerframe, (h, w), mode='bilinear', align_corners=False)
centerframe = (centerframe + 1) / 2.
centerframe = torch.clamp(centerframe, 0, 1)
# transfer to numpy and save
centerframe = centerframe.squeeze(0).permute(1, 2, 0).cpu().numpy()[..., ::-1]
# mkdir
os.makedirs(os.path.dirname(p_save), exist_ok=True)
cv2.imwrite(p_save, (centerframe * 255).astype(np.uint8))
print('save to {}'.format(p_save))
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument('--p_video', type=str, default='')
parser.add_argument('--p_save', type=str, default='')
parser.add_argument('--dir_video', type=str, default='')
parser.add_argument('--dir_save', type=str, default='')
parser.add_argument('--orifps', type=int, default=18)
parser.add_argument('--targetfps', type=int, default=3)
parser.add_argument('--n_keyframes', type=int, default=9)
parser.add_argument('--length_short', type=int, default=384)
parser.add_argument('--length_long', type=int, default=576)
args = parser.parse_args()
assert (args.p_video != '' and args.p_save != '' ) or \
(args.dir_video != "" and args.dir_save != "args.dir_save"), \
'source video must be specified'
orifps = args.orifps
targetfps = args.targetfps
n_keyframes = args.n_keyframes
if args.p_video != '':
p_video = args.p_video
p_save = args.p_save
extract_centerframe(p_video, p_save, orifps, targetfps, n_keyframes, args.length_long, args.length_short)
else:
dir_video = args.dir_video
dir_save = args.dir_save
os.makedirs(dir_save, exist_ok=True)
subdirs = os.listdir(dir_video)
for subdir in subdirs:
subdir_video = os.path.join(dir_video, subdir)
if not os.path.isdir(subdir_video):
continue
subdir_save = os.path.join(dir_save, subdir)
os.makedirs(subdir_save, exist_ok=True)
files = os.listdir(subdir_video)
for file in files:
if not file.endswith('.mp4') or os.path.isdir(file):
continue
p_video = os.path.join(subdir_video, file)
p_save = os.path.join(subdir_save, file.replace('.mp4', '.png'))
print('{} -> {}'.format(p_video, p_save))
extract_centerframe(p_video, p_save, orifps, targetfps, n_keyframes, args.length_long, args.length_short)
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