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"""
This script will test highgui's seek functionality
for different video formats
"""
# import the necessary things for OpenCV and comparson routine
import os
#import python
#from python.highgui import *
#from python.cv import *
import match
from highgui import *
from cv import *
# path to videos and images we need
PREFIX=os.path.join(os.environ["srcdir"],"../../opencv_extra/testdata/python/")
# this is the folder with the videos and images
# and name of output window
IMAGES = PREFIX+"images/"
VIDEOS = PREFIX+"videos/"
show_frames=False
# testing routine, seeks through file and compares read images with frames in frames.QCIF[]
def seek_frame_ok(FILENAME,ERRORS):
# create a video reader using the tiny videofile VIDEOS+FILENAME
video=cvCreateFileCapture(VIDEOS+FILENAME)
if video is None:
# couldn't open video (FAIL)
return 1
if show_frames:
cvNamedWindow("test", CV_WINDOW_AUTOSIZE)
# skip 2 frames and read 3rd frame each until EOF and check if the read image is ok
for k in [0,3,6,9,12,15,18,21,24,27]:
cvSetCaptureProperty(video, CV_CAP_PROP_POS_FRAMES, k)
# try to query frame
image=cvQueryFrame(video)
if image is None:
# returned image is NULL (FAIL)
return 1
compresult = match.match(image,k,ERRORS[k])
if not compresult:
return 1
if show_frames:
cvShowImage("test",image)
cvWaitKey(200)
# same as above, just backwards...
for k in [27,24,21,18,15,12,9,6,3,0]:
cvSetCaptureProperty(video, CV_CAP_PROP_POS_FRAMES, k)
# try to query frame
image=cvQueryFrame(video)
if image is None:
# returned image is NULL (FAIL)
return 1
compresult = match.match(image,k,ERRORS[k])
if not compresult:
return 1
if show_frames:
cvShowImage("test",image)
cvWaitKey(200)
# ATTENTION: We do not release the video reader, window or any image.
# This is bad manners, but Python and OpenCV don't care,
# the whole memory segment will be freed on finish anyway...
del video
# everything is fine (PASS)
return 0
# testing routine, seeks through file and compares read images with frames in frames.QCIF[]
def seek_time_ok(FILENAME,ERRORS):
# create a video reader using the tiny videofile VIDEOS+FILENAME
video=cvCreateFileCapture(VIDEOS+FILENAME)
if video is None:
# couldn't open video (FAIL)
return 1
if show_frames:
cvNamedWindow("test", CV_WINDOW_AUTOSIZE)
# skip 2 frames and read 3rd frame each until EOF and check if the read image is ok
for k in [0,3,6,9,12,15,18,21,24,27]:
cvSetCaptureProperty(video, CV_CAP_PROP_POS_MSEC, k*40)
# try to query frame
image=cvQueryFrame(video)
if image is None:
# returned image is NULL (FAIL)
return 1
compresult = match.match(image,k,ERRORS[k])
if not compresult:
return 1
if show_frames:
cvShowImage("test",image)
cvWaitKey(200)
# same as above, just backwards...
for k in [27,24,21,18,15,12,9,6,3,0]:
cvSetCaptureProperty(video, CV_CAP_PROP_POS_MSEC, k*40)
# try to query frame
image=cvQueryFrame(video)
if image is None:
# returned image is NULL (FAIL)
return 1
compresult = match.match(image,k,ERRORS[k])
if not compresult:
return 1
if show_frames:
cvShowImage("test",image)
cvWaitKey(200)
# ATTENTION: We do not release the video reader, window or any image.
# This is bad manners, but Python and OpenCV don't care,
# the whole memory segment will be freed on finish anyway...
del video
# everything is fine (PASS)
return 0
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