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import copy |
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import json |
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import os |
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import numpy as np |
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import cv2 |
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import pycocotools.mask as maskUtils |
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def get_video_frames(video_path): |
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cap = cv2.VideoCapture(video_path) |
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if not cap.isOpened(): |
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print("Error: Cannot open video file.") |
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return |
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frames = [] |
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frame_id = 0 |
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while True: |
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ret, frame = cap.read() |
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if not ret: |
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break |
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frames.append(frame) |
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frame_id += 1 |
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cap.release() |
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return frames |
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def images_to_video(frames, video_name, fps=6): |
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height, width, layers = frames[0].shape |
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fourcc = cv2.VideoWriter_fourcc(*'mp4v') |
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video = cv2.VideoWriter(video_name, fourcc, fps, (width, height)) |
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for frame in frames: |
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video.write(frame) |
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video.release() |
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return |
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def decode_masklet(masklet): |
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masks = [] |
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for _rle in masklet: |
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mask = maskUtils.decode(_rle) |
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print('mask_shape: ', mask.shape) |
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masks.append(mask) |
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print(len(masks)) |
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return masks |
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def draw_mask(image, mask): |
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obj_mask = mask * 255 |
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obj_mask = np.stack([obj_mask * 1, obj_mask * 0, obj_mask * 0], axis=2) |
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obj_mask = obj_mask * 0.5 + copy.deepcopy(image) * 0.5 |
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obj_mask = obj_mask.astype(np.uint8) |
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return obj_mask |
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def add_mask2images(frames, masklets): |
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show_videos = [] |
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for i_frames, (frame, masks) in enumerate(zip(frames, masklets)): |
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if i_frames == 0: |
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n_obj = masks.shape[-1] |
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for i_obj in range(n_obj): |
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show_videos.append([]) |
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n_obj = masks.shape[-1] |
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for i_obj in range(n_obj): |
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show_videos[i_obj].append(draw_mask(copy.deepcopy(frame), masks[:, :, i_obj])) |
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return show_videos |
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demo_video_anno = '/mnt/bn/xiangtai-training-data-video/dataset/segmentation_datasets/sam_v_full/sav_000/sav_train/sav_000/sav_000001_manual.json' |
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video_root = '/mnt/bn/xiangtai-training-data-video/dataset/segmentation_datasets/sam_v_full/sav_000/sav_train/sav_000' |
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video_save_path = '/mnt/bn/xiangtai-training-data/project/xiangtai-windows/tt_vlm/work_dirs/sam_v_demos/demo.mp4' |
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with open(demo_video_anno, 'r') as f: |
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data = json.load(f) |
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print(data.keys()) |
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for key in data.keys(): |
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if key == 'masklet': |
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continue |
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print(key, ': ') |
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print(data[key]) |
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video_path = os.path.join(video_root, '{}.mp4'.format(data['video_id'])) |
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frames = get_video_frames(video_path) |
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masklents = decode_masklet(data['masklet']) |
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frames = frames[::4] |
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assert len(frames) == len(masklents) |
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show_videos = add_mask2images(frames, masklents) |
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for i, show_video in enumerate(show_videos): |
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video_save_path_ = video_save_path.replace('demo.mp4', 'demo_{}.mp4'.format(i)) |
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images_to_video(show_video, video_save_path_) |
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