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avislice.py
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avislice.py
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import os
import argparse
import cv2
import numpy as np
## 使い方
## py avislice.py -h
def m_slice(path, out, step):
movie = cv2.VideoCapture(path) # 動画の読み込み
Fs = int(movie.get(cv2.CAP_PROP_FRAME_COUNT)) # 動画の全フレーム数を計算
ext_index = np.arange(0, Fs, step) # 静止画を抽出する間隔
for i in range(Fs - 1): # フレームサイズ分のループを回す
flag, frame = movie.read() # 動画から1フレーム読み込む
check = i == ext_index # 現在のフレーム番号iが、抽出する指標番号と一致するかチェックする
# frameを取得できた(flag=True)時だけ処理を行う
if flag: # == True
# もしi番目のフレームが静止画を抽出するものであれば、ファイル名を付けて保存する
if True in check:
# ファイル名は後でフォルダ内で名前でソートした時に連番になるようにする
path_out = out + '\\' + str(i).zfill(5) + '.png'
print(path_out)
cv2.imwrite(path_out, frame)
return
# 引数処理
parser = argparse.ArgumentParser(description='動画ファイルから静止画を出力します.')
parser.add_argument('inFile', help='分割したい動画ファイル名.漢字を含むフォルダやファイル名はやめておきましょう.')
parser.add_argument('-o', '--outFolder', help='出力フォルダ.省略すると動画ファイル名と同じフォルダが作られます.')
parser.add_argument('-s', '--split', type=int, default=10, help='動画スキップ数.')
args = parser.parse_args()
if not args.outFolder:
args.outFolder = os.path.splitext(os.path.basename(args.inFile))[0]
if not os.path.exists(args.outFolder):
os.mkdir(args.outFolder)
# 関数実行:引数=(ファイル名のパス、保存先のフォルダパス、静止画拡張子、ステップ数)
m_slice(args.inFile, args.outFolder, args.split)
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