def determine_average_frame_brightness(video_file_or_pattern,
output_hdf5_file=None):
""" iterates a video and determines its intensity, which will be stored
in a hdf5 file, if the respective file name is given"""
# read video data
with closing(load_any_video(video_file_or_pattern)) as video:
brightness = np.empty(video.frame_count, np.double)
for k, frame in enumerate(display_progress(video)):
brightness[k] = frame.mean()
# restrict the result to the number of actual frames read
if k < video.frame_count:
brightness = brightness[:k + 1]
# write brightness data
if output_hdf5_file:
with h5py.File(output_hdf5_file, "w") as fd:
fd.create_dataset("brightness", data=brightness)
return brightness
def determine_average_frame_brightness(video_file_or_pattern,
output_hdf5_file=None):
""" iterates a video and determines its intensity, which will be stored
in a hdf5 file, if the respective file name is given"""
# read video data
with closing(load_any_video(video_file_or_pattern)) as video:
brightness = np.empty(video.frame_count, np.double)
for k, frame in enumerate(display_progress(video)):
brightness[k] = frame.mean()
# restrict the result to the number of actual frames read
if k < video.frame_count:
brightness = brightness[:k + 1]
# write brightness data
if output_hdf5_file:
with h5py.File(output_hdf5_file, "w") as fd:
fd.create_dataset("brightness", data=brightness)
return brightness
def load_video(self, video=None, crop_video=True, cropping_rect=None,
frames_skipped_in_this_pass=0, frames=None):
""" loads the video and applies a monochrome and cropping filter """
video_parameters = self.data['parameters/video/video_parameters']
# initialize the video
if video is None:
video_filename_pattern = os.path.join(
self.data['parameters/base_folder'],
self.data['parameters/video/filename_pattern']
)
self.video = load_any_video(video_filename_pattern,
parameters=video_parameters)
elif isinstance(video, str):
self.video = load_any_video(video, parameters=video_parameters)
video_filename_pattern = None
else:
self.video = video
video_filename_pattern = None
# save some data about the video
video_info = {'frame_count': self.video.frame_count,
'size': '%d x %d' % tuple(self.video.size),
'fps': self.video.fps}
try:
video_info['filecount'] = self.video.filecount
except AttributeError:
video_info['filecount'] = 1
self.data.create_child('video', video_info)
self.data['video/filename_pattern'] = video_filename_pattern
# restrict the analysis to an interval of frames
if frames is None:
frames = self.data.get('parameters/video/frames', None)
# check whether frames are given
if frames is None:
frames_start, frames_end = None, None
else:
frames_start, frames_end = frames
# supply defaults for missing values
if frames_start is None:
frames_start = self.data.get('parameters/video/frames_skip', 0)
if frames_end is None:
frames_end = self.video.frame_count
# skip additional frames if requested
if frames_skipped_in_this_pass > 0:
frames_start += frames_skipped_in_this_pass
# count last frame from the end when it is negative
if frames_end < 0:
frames_end += self.video.frame_count
# apply the filter on the video
if not(frames_start == 0 and frames_end == self.video.frame_count):
self.video = self.video[frames_start:frames_end]
video_info['frames'] = (frames_start, frames_end)
if cropping_rect is None:
cropping_rect = self.data.get('parameters/video/cropping_rect', None)
# restrict video to green channel if it is a color video
color_channel = 'green' if self.video.is_color else None
video_info['color_channel'] = color_channel
# rotate the video if requested
if self.data['parameters/video/rotation'] != 0:
angle = 90 * self.data['parameters/video/rotation']
self.video = FilterRotate(self.video, angle=angle)
# crop the video if requested
if crop_video and cropping_rect is not None:
if isinstance(cropping_rect, str):
# crop according to the supplied string
self.video = FilterCrop(self.video, region=cropping_rect,
color_channel=color_channel)
else:
# crop to the given rect
self.video = FilterCrop(self.video, rect=cropping_rect,
color_channel=color_channel)
video_info['cropping_rect'] = cropping_rect
else: # user_crop is not None => use the full video
if color_channel is None:
self.video = self.video
else:
self.video = FilterMonochrome(self.video, color_channel)
video_info['cropping_rect'] = None
return video_info
def load_video(self, video=None, crop_video=True, cropping_rect=None,
frames_skipped_in_this_pass=0):
""" loads the video and applies a monochrome and cropping filter """
# initialize the video
if video is None:
video_filename_pattern = os.path.join(self.data['parameters/base_folder'],
self.data['parameters/video/filename_pattern'])
self.video = load_any_video(video_filename_pattern)
else:
self.video = video
video_filename_pattern = None
# save some data about the video
video_info = {'frame_count': self.video.frame_count,
'size': '%d x %d' % tuple(self.video.size),
'fps': self.video.fps}
try:
video_info['filecount'] = self.video.filecount
except AttributeError:
video_info['filecount'] = 1
self.data.create_child('video', video_info)
self.data['video/filename_pattern'] = video_filename_pattern
# restrict the analysis to an interval of frames
frames = self.data.get('parameters/video/frames', None)
if frames is None:
frames_start = self.data.get('parameters/video/frames_skip', 0)
frames_end = self.video.frame_count
else:
frames_start, frames_end = frames
if frames_skipped_in_this_pass > 0:
frames_start += frames_skipped_in_this_pass
if frames_end < 0:
frames_end += self.video.frame_count
if frames_start != 0 or frames_end != self.video.frame_count:
self.video = self.video[frames_start:frames_end]
video_info['frames'] = (frames_start, frames_end)
if cropping_rect is None:
cropping_rect = self.data.get('parameters/video/cropping_rect', None)
# restrict video to green channel if it is a color video
color_channel = 'green' if self.video.is_color else None
video_info['color_channel'] = color_channel
if crop_video and cropping_rect is not None:
if isinstance(cropping_rect, str):
# crop according to the supplied string
self.video = FilterCrop(self.video, region=cropping_rect,
color_channel=color_channel)
else:
# crop to the given rect
self.video = FilterCrop(self.video, rect=cropping_rect,
color_channel=color_channel)
video_info['cropping_rect'] = cropping_rect
else: # user_crop is not None => use the full video
if color_channel is None:
self.video = self.video
else:
self.video = FilterMonochrome(self.video, color_channel)
video_info['cropping_rect'] = None
return video_info
def load_video(self,
video=None,
crop_video=True,
cropping_rect=None,
frames_skipped_in_this_pass=0):
""" loads the video and applies a monochrome and cropping filter """
# initialize the video
if video is None:
video_filename_pattern = os.path.join(
self.data['parameters/base_folder'],
self.data['parameters/video/filename_pattern'])
self.video = load_any_video(video_filename_pattern)
else:
self.video = video
video_filename_pattern = None
# save some data about the video
video_info = {
'frame_count': self.video.frame_count,
'size': '%d x %d' % tuple(self.video.size),
'fps': self.video.fps
}
try:
video_info['filecount'] = self.video.filecount
except AttributeError:
video_info['filecount'] = 1
self.data.create_child('video', video_info)
self.data['video/filename_pattern'] = video_filename_pattern
# restrict the analysis to an interval of frames
frames = self.data.get('parameters/video/frames', None)
if frames is None:
frames_start = self.data.get('parameters/video/frames_skip', 0)
frames_end = self.video.frame_count
else:
frames_start, frames_end = frames
if frames_skipped_in_this_pass > 0:
frames_start += frames_skipped_in_this_pass
if frames_end < 0:
frames_end += self.video.frame_count
if frames_start != 0 or frames_end != self.video.frame_count:
self.video = self.video[frames_start:frames_end]
video_info['frames'] = (frames_start, frames_end)
if cropping_rect is None:
cropping_rect = self.data.get('parameters/video/cropping_rect',
None)
# restrict video to green channel if it is a color video
color_channel = 'green' if self.video.is_color else None
video_info['color_channel'] = color_channel
if crop_video and cropping_rect is not None:
if isinstance(cropping_rect, str):
# crop according to the supplied string
self.video = FilterCrop(self.video,
region=cropping_rect,
color_channel=color_channel)
else:
# crop to the given rect
self.video = FilterCrop(self.video,
rect=cropping_rect,
color_channel=color_channel)
video_info['cropping_rect'] = cropping_rect
else: # user_crop is not None => use the full video
if color_channel is None:
self.video = self.video
else:
self.video = FilterMonochrome(self.video, color_channel)
video_info['cropping_rect'] = None
return video_info
