add edvr inference code

applications/EDVR/configs/edvr.yaml

-MODEL:
-    name: "EDVR"
-    format: "png"
-    num_frames: 5
-    center: 2
-    num_filters: 64
-    deform_conv_groups: 8
-    front_RBs: 5
-    back_RBs: 10
-    predeblur: False
-    HR_in: False
-    w_TSA: False
-
-TRAIN:
-    epoch: 45
-    use_gpu: True
-    num_gpus: 8
-    scale: 4
-    crop_size: 256
-    interval_list: [1]
-    random_reverse: False
-    number_frames: 5
-    batch_size: 32
-    #file_root: "/mnt/sungaofeng/edvr/paddle/video/data/dataset/edvr/REDS/train_sharp_bicubic/X4"
-    file_root: "/ssd1/vis/sungaofeng/edvr/mmsr/datasets/REDS/train_sharp_bicubic/X4"
-    #gt_root: "/mnt/sungaofeng/edvr/paddle/video/data/dataset/edvr/REDS/train_sharp"
-    gt_root: "/ssd1/vis/sungaofeng/edvr/mmsr/datasets/REDS/train_sharp"
-    use_flip: True
-    use_rot: True
-    base_learning_rate: 0.0004
-    l2_weight_decay: 0.0
-    T_periods: [150000, 150000, 150000, 150000] # for cosine annealing restart
-    restarts: [150000, 300000, 450000] # for cosine annealing restart
-    weights: [1, 1, 1] # for cosine annealing restart
-    eta_min: 1e-7 # for cosine annealing restart
-    num_reader_threads: 8
-    buf_size: 1024
-    fix_random_seed: False
-
-VALID:
-    scale: 4
-    crop_size: 256
-    interval_list: [1]
-    random_reverse: False
-    number_frames: 5
-    batch_size: 32 #256
-    #file_root: "/mnt/sungaofeng/edvr/paddle/video/data/dataset/edvr/REDS4/GT"
-    file_root: "/ssd1/vis/sungaofeng/edvr/mmsr/datasets/REDS4/sharp_bicubic"
-    #gt_root: "/mnt/sungaofeng/edvr/paddle/video/data/dataset/edvr/REDS4/sharp_bicubic"
-    gt_root: "/ssd1/vis/sungaofeng/edvr/mmsr/datasets/REDS4/GT"
-    use_flip: False
-    use_rot: False
-
-TEST:
-    scale: 4
-    crop_size: 256
-    interval_list: [1]
-    random_reverse: False
-    number_frames: 5
-    batch_size: 1
-    #file_root: "/ssd1/vis/sungaofeng/edvr/mmsr/datasets/REDS4/sharp_bicubic"
-    #gt_root: "/ssd1/vis/sungaofeng/edvr/mmsr/datasets/REDS4/GT"
-    file_root: "/mnt/sungaofeng/edvr/paddle/video/data/dataset/edvr/REDS4/sharp_bicubic"
-    gt_root: "/mnt/sungaofeng/edvr/paddle/video/data/dataset/edvr/REDS4/GT"
-    use_flip: False
-    use_rot: False
-
-INFER:
-    scale: 4
-    crop_size: 256
-    interval_list: [1]
-    random_reverse: False
-    number_frames: 5
-    batch_size: 1
-    file_root: "/ssd1/vis/sungaofeng/edvr/mmsr/datasets/REDS4/sharp_bicubic"
-    gt_root: "/ssd1/vis/sungaofeng/edvr/mmsr/datasets/REDS4/GT"
-    use_flip: False
-    use_rot: False