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frameclipper.py
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frameclipper.py
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import copy
import os
import cv2
import numpy as np
import videostream
import detect
import scenewriter
import rectclipper
import qadetector
################################################################################
class FrameClipper:
#------------------------------------------------------------------------------
def __init__(self, pathname, outfolder, framePos=0):
completed = False
# 출력 폴더를 자른다
self.outputPath = os.path.join(outfolder, os.path.splitext(os.path.basename(pathname))[0])
self.debug = False
# 완료 마커가 있는지 체크
try:
open(os.path.join(self.outputPath, "completed"), "r")
completed = True
except:
pass
# 시작 프레임 위치가 설정되어 있으면 디버그 모드
if framePos > 0:
self.outputPath = 'debug'
self.debug = True
if not completed:
# 완료 마커가 없으면 재생 시작
self.fvs = videostream.FileVideoStream(pathname, framePos).start()
if self.fvs.isOpened():
#print('output to {}'.format(self.outputPath))
self.extent = self.fvs.getExtent()
self.rectDetector = rectclipper.RectDetector()
self.sceneWriter = scenewriter.SceneWriter(self.outputPath, self.fvs.getFPS())
else:
print("Error opening video stream or file (1)")
self.qnaFinder = qadetector.QADetector(pathname)
if not self.qnaFinder.isOpened():
print("Error opening video stream or file (2)")
else:
print('already processed, skipping')
self.fvs = None
self.qnaFinder = None
self.play = True
self.lastFrameNum = 0
self.lastFrame = None
self.currentFrameNum = 0
self.currentFrame = None
self.buffer = []
self.waitForBufferEmptied = False
self.clipped = None
self.detected = None
self.qaFrame = None
#------------------------------------------------------------------------------
def close(self):
if self.fvs is not None:
if self.fvs.finished:
if scenewriter.writeFiles:
# 완료 마커를 기록한다
try:
f = open(os.path.join(self.outputPath, "completed"), "w+")
f.write('completed')
close(f)
except:
pass
self.fvs.stop()
self.fvs = None
if self.qnaFinder is not None:
self.qnaFinder.stop()
self.qnaFinder = None
if self.sceneWriter is not None:
self.sceneWriter.close()
self.sceneWriter = None
#------------------------------------------------------------------------------
def isOpened(self):
if self.fvs is not None:
return self.fvs.isOpened()
return False
#------------------------------------------------------------------------------
def isPlaying(self):
return self.play
#------------------------------------------------------------------------------
def getTotalFrames(self):
if self.fvs is not None:
return self.fvs.totalFrames
return 0
#------------------------------------------------------------------------------
def setPlaying(self, value):
self.play = value
print('play flag changed - {}'.format(value))
#------------------------------------------------------------------------------
def getCurrentFrame(self):
return self.currentFrame
#------------------------------------------------------------------------------
def more(self):
if len(self.buffer) > 0:
return True
return self.fvs.more()
#------------------------------------------------------------------------------
def fillBuffer(self):
buffered = len(self.buffer)
toBuffer = 30 - buffered
for i in range(0, toBuffer):
if self.fvs.more():
f = self.fvs.tryRead()
if f is not None:
self.buffer.append(f)
else:
break
else:
break
#------------------------------------------------------------------------------
def peekLastBuffered(self):
bufferLen = len(self.buffer)
if bufferLen > 0:
return self.buffer[bufferLen-1]
return None
#------------------------------------------------------------------------------
def getNextFrame(self):
if len(self.buffer) > 0:
f = self.buffer[0]
self.buffer.pop(0)
return f
self.waitForBufferEmptied = False
return self.fvs.read()
#------------------------------------------------------------------------------
def getCurrentFrameNum(self):
return self.lastFrameNum
#------------------------------------------------------------------------------
def do(self, thres1, thres2, thres3, thres4, epsilon):
if self.more() and self.isPlaying():
detectedBefore = self.rectDetector.detectedAtLeastOnce()
# 다음 프레임을 받아온다
(self.currentFrameNum, self.currentFrame) = self.getNextFrame()
self.lastFrameNum = self.currentFrameNum
self.lastFrame = self.currentFrame.copy()
# 가장 큰 사각형을 감지해서 자른다
(self.clipped, self.detected) = self.rectDetector.detectAndClip(self.currentFrame, thres1, thres2, epsilon)
# 변경 감지를 해보자
self.sceneWriter.checkAndWrite(self.currentFrameNum, self.currentFrame, self.clipped, thres3, thres4)
# 프레임이 스테이블하면 앞으로 진행한다
if self.sceneWriter.isStabilized() and not self.waitForBufferEmptied:
self.peekForward(thres1, thres2, thres3, thres4, epsilon)
# qna 디텍터를 시작한다
if not detectedBefore and self.rectDetector.detectedAtLeastOnce():
self.qnaFinder.start(self.rectDetector.getLastDetectedRectangle(), thres1, thres2)
if self.qaFrame is None and self.qnaFinder.finished:
self.qaFrame = self.qnaFinder.qaBegin
if self.fvs is not None:
self.fvs.SetEndFrame(self.qnaFinder.qaBegin)
else:
print('something wrong (no video stream reader to report end frame')
else:
# 기존 프레임을 사용한다
self.currentFrameNum = self.lastFrameNum
self.currentFrame = self.lastFrame.copy()
# 디버깅 용도, 클리핑 영역 검출을 계속 시도한다
# 가장 큰 사각형을 감지해서 자른다
(self.clipped, self.detected) = self.rectDetector.detectAndClip(self.currentFrame, thres1, thres2, epsilon)
#------------------------------------------------------------------------------
def peekForward(self, thres1, thres2, thres3, thres4, epsilon):
while True:
# 안정화되었다, 프레임 패스트 포워딩을 시도한다
# 먼저 버퍼를 충분히 채운다
self.fillBuffer()
# 버퍼의 마지막 프레임을 꺼내서
lastFrame = self.peekLastBuffered()
if lastFrame is not None:
# 방금 자른 곳을 다시 잘라본다
(peekClipped, peekDetected) = self.rectDetector.detectAndClip(lastFrame[1], thres1, thres2, epsilon)
if peekClipped is not None:
if self.sceneWriter.isStable(lastFrame[0], peekClipped, thres3, thres4):
# 변경 감지에 아무 것도 걸리지 않으면 이 구간은 스킵한다
self.buffer = []
else:
# 변경 감지에 뭔가 걸렸다, 미리 로드한 프레임을 소진할 때까지 스트림에서 읽지 않는다
self.waitForBufferEmptied = True
break
else:
break
else:
break
#------------------------------------------------------------------------------
def retryClip(self, thres1, thres2):
self.clipped = self.rectDetector.detectAndClip(self.currentFrame, thres1, thres2)
#------------------------------------------------------------------------------
def getDetected(self):
return self.detected
#------------------------------------------------------------------------------
def detectedAtLeastOnce(self):
return self.rectDetector.clipRectDetectedOnce