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| # Copyright (c) 2024 Bytedance Ltd. and/or its affiliates | |
| # | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| import os | |
| import subprocess | |
| import tqdm | |
| from multiprocessing import Pool | |
| import cv2 | |
| paths = [] | |
| def gather_paths(input_dir, output_dir): | |
| for video in sorted(os.listdir(input_dir)): | |
| if video.endswith(".mp4"): | |
| video_input = os.path.join(input_dir, video) | |
| video_output = os.path.join(output_dir, video) | |
| if os.path.isfile(video_output): | |
| continue | |
| paths.append([video_input, video_output]) | |
| elif os.path.isdir(os.path.join(input_dir, video)): | |
| gather_paths(os.path.join(input_dir, video), os.path.join(output_dir, video)) | |
| def get_video_fps(video_path: str): | |
| cam = cv2.VideoCapture(video_path) | |
| fps = cam.get(cv2.CAP_PROP_FPS) | |
| return fps | |
| def resample_fps_hz(video_input, video_output): | |
| os.makedirs(os.path.dirname(video_output), exist_ok=True) | |
| if get_video_fps(video_input) == 25: | |
| command = f"ffmpeg -loglevel error -y -i {video_input} -c:v copy -ar 16000 -q:a 0 {video_output}" | |
| else: | |
| command = f"ffmpeg -loglevel error -y -i {video_input} -r 25 -ar 16000 -q:a 0 {video_output}" | |
| subprocess.run(command, shell=True) | |
| def multi_run_wrapper(args): | |
| return resample_fps_hz(*args) | |
| def resample_fps_hz_multiprocessing(input_dir, output_dir, num_workers): | |
| print(f"Recursively gathering video paths of {input_dir} ...") | |
| gather_paths(input_dir, output_dir) | |
| print(f"Resampling FPS and Hz of {input_dir} ...") | |
| with Pool(num_workers) as pool: | |
| for _ in tqdm.tqdm(pool.imap_unordered(multi_run_wrapper, paths), total=len(paths)): | |
| pass | |
| if __name__ == "__main__": | |
| input_dir = "/mnt/bn/maliva-gen-ai-v2/chunyu.li/HDTF/segmented/train" | |
| output_dir = "/mnt/bn/maliva-gen-ai-v2/chunyu.li/HDTF/resampled_test" | |
| num_workers = 20 | |
| resample_fps_hz_multiprocessing(input_dir, output_dir, num_workers) | |