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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
paths = []
def gather_paths(input_dir, output_dir):
for video in sorted(os.listdir(input_dir)):
if video.endswith(".mp4"):
video_basename = video[:-4]
video_input = os.path.join(input_dir, video)
video_output = os.path.join(output_dir, f"{video_basename}_%03d.mp4")
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 segment_video(video_input, video_output):
os.makedirs(os.path.dirname(video_output), exist_ok=True)
command = f"ffmpeg -loglevel error -y -i {video_input} -map 0 -c:v copy -segment_time 5 -f segment -reset_timestamps 1 -q:a 0 {video_output}"
# command = f'ffmpeg -loglevel error -y -i {video_input} -map 0 -segment_time 5 -f segment -reset_timestamps 1 -force_key_frames "expr:gte(t,n_forced*5)" -crf 18 -q:a 0 {video_output}'
subprocess.run(command, shell=True)
def multi_run_wrapper(args):
return segment_video(*args)
def segment_videos_multiprocessing(input_dir, output_dir, num_workers):
print(f"Recursively gathering video paths of {input_dir} ...")
gather_paths(input_dir, output_dir)
print(f"Segmenting videos 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/avatars_new/cut"
output_dir = "/mnt/bn/maliva-gen-ai-v2/chunyu.li/avatars_new/segmented"
num_workers = 50
segment_videos_multiprocessing(input_dir, output_dir, num_workers)
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