model = dict(
    type='Recognizer3D',
    backbone=dict(
        type='ResNet3dSlowOnly',
        depth=50,
        pretrained=None,
        in_channels=17,
        base_channels=32,
        num_stages=3,
        out_indices=(2, ),
        stage_blocks=(4, 6, 3),
        conv1_stride_s=1,
        pool1_stride_s=1,
        inflate=(0, 1, 1),
        spatial_strides=(2, 2, 2),
        temporal_strides=(1, 1, 2),
        dilations=(1, 1, 1)),
    cls_head=dict(
        type='I3DHead',
        in_channels=512,
        num_classes=120,
        spatial_type='avg',
        dropout_ratio=0.5),
    train_cfg=dict(),
    test_cfg=dict(average_clips='prob'))

dataset_type = 'PoseDataset'
ann_file_train = 'data/posec3d/ntu60_xsub_train.pkl'
ann_file_val = 'data/posec3d/ntu60_xsub_val.pkl'
left_kp = [1, 3, 5, 7, 9, 11, 13, 15]
right_kp = [2, 4, 6, 8, 10, 12, 14, 16]
skeletons = [[0, 5], [0, 6], [5, 7], [7, 9], [6, 8], [8, 10], [5, 11],
             [11, 13], [13, 15], [6, 12], [12, 14], [14, 16], [0, 1], [0, 2],
             [1, 3], [2, 4], [11, 12]]
train_pipeline = [
    dict(type='UniformSampleFrames', clip_len=48),
    dict(type='PoseDecode'),
    dict(type='PoseCompact', hw_ratio=1., allow_imgpad=True),
    dict(type='Resize', scale=(-1, 64)),
    dict(type='RandomResizedCrop', area_range=(0.56, 1.0)),
    dict(type='Resize', scale=(56, 56), keep_ratio=False),
    dict(type='Flip', flip_ratio=0.5, left_kp=left_kp, right_kp=right_kp),
    dict(
        type='GeneratePoseTarget',
        sigma=0.6,
        use_score=True,
        with_kp=False,
        with_limb=True,
        skeletons=skeletons),
    dict(type='FormatShape', input_format='NCTHW'),
    dict(type='Collect', keys=['imgs', 'label'], meta_keys=[]),
    dict(type='ToTensor', keys=['imgs', 'label'])
]
val_pipeline = [
    dict(type='UniformSampleFrames', clip_len=48, num_clips=1, test_mode=True),
    dict(type='PoseDecode'),
    dict(type='PoseCompact', hw_ratio=1., allow_imgpad=True),
    dict(type='Resize', scale=(-1, 64)),
    dict(type='CenterCrop', crop_size=64),
    dict(
        type='GeneratePoseTarget',
        sigma=0.6,
        use_score=True,
        with_kp=False,
        with_limb=True,
        skeletons=skeletons),
    dict(type='FormatShape', input_format='NCTHW'),
    dict(type='Collect', keys=['imgs', 'label'], meta_keys=[]),
    dict(type='ToTensor', keys=['imgs'])
]
test_pipeline = [
    dict(
        type='UniformSampleFrames', clip_len=48, num_clips=10, test_mode=True),
    dict(type='PoseDecode'),
    dict(type='PoseCompact', hw_ratio=1., allow_imgpad=True),
    dict(type='Resize', scale=(-1, 64)),
    dict(type='CenterCrop', crop_size=64),
    dict(
        type='GeneratePoseTarget',
        sigma=0.6,
        use_score=True,
        with_kp=False,
        with_limb=True,
        skeletons=skeletons,
        double=True,
        left_kp=left_kp,
        right_kp=right_kp),
    dict(type='FormatShape', input_format='NCTHW'),
    dict(type='Collect', keys=['imgs', 'label'], meta_keys=[]),
    dict(type='ToTensor', keys=['imgs'])
]
data = dict(
    videos_per_gpu=16,
    workers_per_gpu=2,
    test_dataloader=dict(videos_per_gpu=1),
    train=dict(
        type=dataset_type,
        ann_file=ann_file_train,
        data_prefix='',
        class_prob={i: 1 + int(i >= 60)
                    for i in range(120)},
        pipeline=train_pipeline),
    val=dict(
        type=dataset_type,
        ann_file=ann_file_val,
        data_prefix='',
        pipeline=val_pipeline),
    test=dict(
        type=dataset_type,
        ann_file=ann_file_val,
        data_prefix='',
        pipeline=test_pipeline))
# optimizer
optimizer = dict(
    type='SGD', lr=0.2, momentum=0.9,
    weight_decay=0.0003)  # this lr is used for 8 gpus
optimizer_config = dict(grad_clip=dict(max_norm=40, norm_type=2))
# learning policy
lr_config = dict(policy='CosineAnnealing', by_epoch=False, min_lr=0)
total_epochs = 240
checkpoint_config = dict(interval=10)
workflow = [('train', 10)]
evaluation = dict(
    interval=10,
    metrics=['top_k_accuracy', 'mean_class_accuracy'],
    topk=(1, 5))
log_config = dict(
    interval=20, hooks=[
        dict(type='TextLoggerHook'),
    ])
dist_params = dict(backend='nccl')
log_level = 'INFO'
work_dir = './work_dirs/posec3d/slowonly_r50_u48_240e_ntu120_xsub_limb'
load_from = None
resume_from = None
find_unused_parameters = False
