def multiple_timelines():
from query.models import LabeledInterview, LabeledPanel, LabeledCommercial
from esper.rekall import qs_to_intrvllists, intrvllists_to_result, add_intrvllists_to_result
interviews = LabeledInterview.objects \
.annotate(fps=F('video__fps')) \
.annotate(min_frame=F('fps') * F('start')) \
.annotate(max_frame=F('fps') * F('end'))
panels = LabeledPanel.objects \
.annotate(fps=F('video__fps')) \
.annotate(min_frame=F('fps') * F('start')) \
.annotate(max_frame=F('fps') * F('end'))
commercials = LabeledCommercial.objects \
.annotate(fps=F('video__fps')) \
.annotate(min_frame=F('fps') * F('start')) \
.annotate(max_frame=F('fps') * F('end'))
result = intrvllists_to_result(qs_to_intrvllists(interviews))
add_intrvllists_to_result(result, qs_to_intrvllists(panels), color="blue")
add_intrvllists_to_result(result, qs_to_intrvllists(commercials), color="purple")
return result
def shot_reverse_shot():
from query.models import Face
from rekall.video_interval_collection import VideoIntervalCollection
from rekall.parsers import in_array, bbox_payload_parser
from rekall.merge_ops import payload_plus
from esper.rekall import intrvllists_to_result_bbox
from rekall.payload_predicates import payload_satisfies
from rekall.list_predicates import length_at_most
from rekall.logical_predicates import and_pred, or_pred
from rekall.spatial_predicates import scene_graph, make_region
from rekall.temporal_predicates import before, after
from rekall.bbox_predicates import height_at_least
from esper.rekall import intrvllists_to_result, intrvllists_to_result_with_objects, add_intrvllists_to_result
# If True, visualize results in a timeline
TIMELINE_OUTPUT = False
RIGHT_HALF_MIN_X = 0.45
LEFT_HALF_MAX_X = 0.55
MIN_FACE_HEIGHT = 0.4
MAX_FACES_ON_SCREEN = 2
# faces are sampled every 12 frames
SAMPLING_RATE = 12
ONE_SECOND = 24
FOUR_SECONDS = 96
TEN_SECONDS = 240
# Annotate face rows with start and end frames and the video ID
faces = Face.objects.annotate(min_frame=F('frame__number'),
max_frame=F('frame__number'),
video_id=F('frame__video_id'))
right_half = make_region(RIGHT_HALF_MIN_X, 0.0, 1.0, 1.0)
left_half = make_region(0.0, 0.0, LEFT_HALF_MAX_X, 1.0)
graph = {
'nodes': [{
'name': 'face',
'predicates': [height_at_least(MIN_FACE_HEIGHT)]
}],
'edges': []
}
vids = VideoIntervalCollection.from_django_qs(
faces,
with_payload=in_array(
bbox_payload_parser(
VideoIntervalCollection.django_accessor))).coalesce(
payload_merge_op=payload_plus)
# Get sequences where there's a face on the right half of the screen and
# there are at most two faces
faces_on_right = vids.filter(
and_pred(payload_satisfies(length_at_most(MAX_FACES_ON_SCREEN)),
payload_satisfies(scene_graph(
graph, region=right_half)))).dilate(SAMPLING_RATE /
2).coalesce()
# Get sequences where there's a face on the left half of the screen and
# there are at most two faces
faces_on_left = vids.filter(
and_pred(payload_satisfies(length_at_most(MAX_FACES_ON_SCREEN)),
payload_satisfies(scene_graph(
graph,
region=left_half)))).dilate(SAMPLING_RATE / 2).coalesce()
# Sequences where faces on left up to one second before/after faces on left
# Four seconds of buffer time between left-then-right/right-then-left
# segments
# Only keep remaining sequences that last longer than ten seconds
shot_reverse_shot = faces_on_right.merge(
faces_on_left,
predicate=or_pred(
before(max_dist=ONE_SECOND), after(max_dist=ONE_SECOND),
arity=2)).dilate(FOUR_SECONDS).coalesce().dilate(
-1 * FOUR_SECONDS).filter_length(min_length=TEN_SECONDS)
# Post-process to display in Esper widget
if TIMELINE_OUTPUT:
results = intrvllists_to_result(shot_reverse_shot.get_allintervals())
add_intrvllists_to_result(results,
faces_on_left.get_allintervals(),
color='black')
add_intrvllists_to_result(results,
faces_on_right.get_allintervals(),
color='green')
else:
results = intrvllists_to_result_with_objects(
shot_reverse_shot.get_allintervals(), lambda payload, video: [])
return results
def shot_reverse_shot_intensification():
from query.models import Face
from rekall.video_interval_collection import VideoIntervalCollection
from rekall.parsers import in_array, bbox_payload_parser, merge_dict_parsers, named_payload
from rekall.merge_ops import payload_plus, merge_named_payload, payload_first
from esper.rekall import intrvllists_to_result_bbox
from rekall.payload_predicates import payload_satisfies, on_name
from rekall.list_predicates import length_at_most
from rekall.logical_predicates import and_pred, or_pred
from rekall.spatial_predicates import scene_graph, make_region
from rekall.temporal_predicates import before, after
from rekall.bbox_predicates import height_at_least
from esper.rekall import intrvllists_to_result, intrvllists_to_result_with_objects, add_intrvllists_to_result
# If True, visualize results in a timeline
TIMELINE_OUTPUT = False
RIGHT_HALF_MIN_X = 0.45
LEFT_HALF_MAX_X = 0.55
MIN_FACE_HEIGHT = 0.4
MAX_FACES_ON_SCREEN = 2
# faces are sampled every 12 frames
SAMPLING_RATE = 12
ONE_SECOND = 24
FOUR_SECONDS = 96
TEN_SECONDS = 240
# Annotate face rows with start and end frames and the video ID
faces = Face.objects.annotate(min_frame=F('frame__number'),
max_frame=F('frame__number'),
video_id=F('frame__video_id'),
shot_scale=F('frame__shot_scale'))
right_half = make_region(RIGHT_HALF_MIN_X, 0.0, 1.0, 1.0)
left_half = make_region(0.0, 0.0, LEFT_HALF_MAX_X, 1.0)
graph = {
'nodes': [{
'name': 'face',
'predicates': [height_at_least(MIN_FACE_HEIGHT)]
}],
'edges': []
}
vids = VideoIntervalCollection.from_django_qs(
faces,
with_payload=merge_dict_parsers([
named_payload(
'faces',
in_array(
bbox_payload_parser(
VideoIntervalCollection.django_accessor))),
named_payload('shot_scale', in_array(lambda obj: obj.shot_scale))
])).coalesce(
payload_merge_op=merge_named_payload({
'faces': payload_plus,
'shot_scale': payload_first
}))
def shot_scales_decreasing(scales):
if len(scales) <= 1:
return True
cur_scale = scales[0]
for scale in scales:
if cur_scale == 1:
cur_scale = scale
continue
if scale == 1:
continue
if scale < cur_scale:
# Shot scale has gotten father here
return False
return True
# Get sequences where there's a face on the right half of the screen and
# there are at most two faces
# Payload is the faces in the first frame, and a list of the shot scales
# throughout the sequence
# Filter out any sequences where the shot scale gets farther away over the sequence
faces_on_right = vids.filter(
and_pred(
payload_satisfies(
on_name('faces', length_at_most(MAX_FACES_ON_SCREEN))),
payload_satisfies(
on_name('faces', scene_graph(
graph,
region=right_half))))).dilate(SAMPLING_RATE / 2).coalesce(
payload_merge_op=merge_named_payload(
{
'faces': payload_first,
'shot_scale': payload_plus
})).filter(lambda intrvl: shot_scales_decreasing(
intrvl.get_payload()['shot_scale']))
# Get sequences where there's a face on the left half of the screen and
# there are at most two faces
# Payload is the faces in the first frame, and a list of the shot scales
# throughout the sequence
faces_on_left = vids.filter(
and_pred(
payload_satisfies(
on_name('faces', length_at_most(MAX_FACES_ON_SCREEN))),
payload_satisfies(
on_name('faces', scene_graph(
graph,
region=left_half))))).dilate(SAMPLING_RATE / 2).coalesce(
payload_merge_op=merge_named_payload(
{
'faces': payload_first,
'shot_scale': payload_plus
})).filter(lambda intrvl: shot_scales_decreasing(
intrvl.get_payload()['shot_scale']))
# Sequences where faces on left up to one second before/after faces on left
# Four seconds of buffer time between left-then-right/right-then-left
# segments
# Filter sequences by decreasing shot sequences
# Only keep remaining sequences that last longer than ten seconds
shot_reverse_shot_intensification = faces_on_right.merge(
faces_on_left, predicate=before(max_dist=ONE_SECOND)).set_union(
faces_on_left.merge(faces_on_right,
predicate=before(max_dist=ONE_SECOND))
).dilate(FOUR_SECONDS).coalesce(
payload_merge_op=merge_named_payload({
'faces': payload_first,
'shot_scale': payload_plus
})).dilate(
-1 *
FOUR_SECONDS).filter(lambda intrvl: shot_scales_decreasing(
intrvl.get_payload()['shot_scale'])).filter_length(
min_length=TEN_SECONDS)
def non_uniform(shot_scales):
return (len(set(shot_scales)) > 2
if 1 in set(shot_scales) else len(set(shot_scales)) > 1)
# Finally, filter out any shot sequences where the shot scales are uniform
shot_reverse_shot_intensification = shot_reverse_shot_intensification.filter(
lambda intrvl: non_uniform(intrvl.get_payload()['shot_scale']))
# Post-process to display in Esper widget
if TIMELINE_OUTPUT:
results = intrvllists_to_result(
shot_reverse_shot_intensification.get_allintervals())
add_intrvllists_to_result(results,
faces_on_left.get_allintervals(),
color='black')
add_intrvllists_to_result(results,
faces_on_right.get_allintervals(),
color='green')
else:
results = intrvllists_to_result_with_objects(
shot_reverse_shot_intensification.get_allintervals(),
lambda payload, video: [])
return results