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train_2.py
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train_2.py
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import argparse
from ast import arg
import math
import os
import random
import pickle
import numpy as np
import pandas as pd
import torch
from pytorchvideo.data import make_clip_sampler, labeled_video_dataset
from pytorchvideo.models import create_slowfast
from torch.backends import cudnn
from torch.nn import CrossEntropyLoss
from torch.optim import Adam
from torch.utils.data import DataLoader
from tqdm import tqdm
from utils import train_transform, test_transform, clip_duration, num_classes
# for reproducibility
random.seed(1)
np.random.seed(1)
torch.manual_seed(1)
cudnn.deterministic = True
cudnn.benchmark = False
# train for one epoch
def train(model, data_loader, train_optimizer):
model.train()
total_loss, total_acc, total_num = 0.0, 0, 0
train_bar = tqdm(data_loader, total=math.ceil(train_data.num_videos / batch_size), dynamic_ncols=True)
for batch in train_bar:
video, label = [i.cuda() for i in batch['video']], batch['label'].cuda()
train_optimizer.zero_grad()
pred = model(video)
loss = loss_criterion(pred, label)
total_loss += loss.item() * video[0].size(0)
total_acc += (torch.eq(pred.argmax(dim=-1), label)).sum().item()
loss.backward()
train_optimizer.step()
total_num += video[0].size(0)
train_bar.set_description('Train Epoch: [{}/{}] Loss: {:.4f} Acc: {:.2f}%'
.format(epoch, epochs, total_loss / total_num, total_acc * 100 / total_num))
return total_loss / total_num, total_acc / total_num
# test for one epoch
def val(model, data_loader):
model.eval()
with torch.no_grad():
total_top_1, total_top_5, total_num = 0, 0, 0
test_bar = tqdm(data_loader, total=math.ceil(test_data.num_videos / batch_size), dynamic_ncols=True)
for batch in test_bar:
video, label = [i.cuda() for i in batch['video']], batch['label'].cuda()
pred = model(video)
total_top_1 += (torch.eq(pred.argmax(dim=-1), label)).sum().item()
total_top_5 += torch.any(torch.eq(pred.topk(k=5, dim=-1).indices, label.unsqueeze(dim=-1)),
dim=-1).sum().item()
total_num += video[0].size(0)
test_bar.set_description('Test Epoch: [{}/{}] | Top-1:{:.2f}% | Top-5:{:.2f}%'
.format(epoch, epochs, total_top_1 * 100 / total_num,
total_top_5 * 100 / total_num))
return total_top_1 / total_num, total_top_5 / total_num
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='Train Model')
# common args
parser.add_argument('--data_root', default='data', type=str, help='Datasets root path')
parser.add_argument('--batch_size', default=8, type=int, help='Number of videos in each mini-batch')
parser.add_argument('--epochs', default=10, type=int, help='Number of epochs over the model to train')
parser.add_argument('--save_root', default='result', type=str, help='Result saved root path')
parser.add_argument('--pre_trained', default='none', type=str, help='Pre-trained path')
# args parse
args = parser.parse_args()
data_root, batch_size, epochs, save_root = args.data_root, args.batch_size, args.epochs, args.save_root
# data prepare
train_data = labeled_video_dataset('{}/train'.format(data_root), make_clip_sampler('random', clip_duration),
transform=train_transform, decode_audio=False)
test_data = labeled_video_dataset('{}/test'.format(data_root),
make_clip_sampler('constant_clips_per_video', clip_duration, 1),
transform=test_transform, decode_audio=False)
train_loader = DataLoader(train_data, batch_size=batch_size, num_workers=8)
test_loader = DataLoader(test_data, batch_size=batch_size, num_workers=8)
# model define, loss setup and optimizer config
device = torch.device('cuda:0' if torch.cuda.is_available() else 'cpu')
# Pick a pretrained model and load the pretrained weights
model_name = "slowfast_r50"
model = torch.hub.load("facebookresearch/pytorchvideo", model=model_name, pretrained=True)
# Set to eval mode and move to desired device
slow_fast = model.to(device)
slow_fast = model.eval()
# slow_fast = create_slowfast(model_num_class=num_classes).cuda()
# load pre-trained
#if args.pre_trained != 'none':
# print('Pre-trained paramter prepare for loading : ', args.pre_trained)
# slow_fast.state_dict = torch.load(args.pre_trained)
# print('Pre-trained parameter loaded!')
# slow_fast = torch.hub.load('facebookresearch/pytorchvideo:main', model='slowfast_r50', pretrained=True)
loss_criterion = CrossEntropyLoss()
optimizer = Adam(slow_fast.parameters(), lr=1e-1)
# training loop
results = {'loss': [], 'acc': [], 'top-1': [], 'top-5': []}
if not os.path.exists(save_root):
os.makedirs(save_root)
best_acc = 0.0
for epoch in range(1, epochs + 1):
train_loss, train_acc = train(slow_fast, train_loader, optimizer)
results['loss'].append(train_loss)
results['acc'].append(train_acc * 100)
top_1, top_5 = val(slow_fast, test_loader)
results['top-1'].append(top_1 * 100)
results['top-5'].append(top_5 * 100)
# save statistics
data_frame = pd.DataFrame(data=results, index=range(1, epoch + 1))
data_frame.to_csv('{}/metrics.csv'.format(save_root), index_label='epoch')
if top_1 > best_acc:
best_acc = top_1
torch.save(slow_fast.state_dict(), '{}/slow_fast.pth'.format(save_root))