def _fill_names_sequences(self):
'''Fill list of sequences [[(prefix1, name), (prefix1, name1), ..], ..]
Fill `names_sequences` with lists of sequences, i.e., of lists
of (prefix, name) pair with the desired overlap and seq_length N:
[(prefix1, name1), (prefix1, name2), .., (prefix1, nameN)]
[(prefix1, name(N-overlap), (prefix1, name(N-overlap+1)), ..,
(prefix1, name(N-overlap+N)]
'''
names_sequences = {}
seq_length = max(self.seq_length, 1)
# Cycle over prefix/subset/video/category/...
for prefix, names in self.names_per_subset.items():
# Repeat the first and last elements so that the first and last
# sequences are filled with repeated elements up/from the
# middle element.
if self.return_extended_sequences:
names = ([names[0]] * (seq_length // 2) + names + [names[-1]] *
(seq_length // 2))
# Fill sequences with multiple el with form
# [(prefix, name1), (prefix, name2), ...]. The names here
# have overlap = (seq_length - 1), i.e., "stride" = 1
sequences = [
el for el in overlap_grouper(names, seq_length, prefix=prefix)
]
# Sequences of frames with the requested overlap
sequences = sequences[::seq_length - self.overlap]
names_sequences[prefix] = sequences
self.names_sequences = names_sequences
def _fill_names_sequences(self):
'''Fill list of sequences [[(prefix1, name), (prefix1, name1), ..], ..]
Fill `names_sequences` with lists of sequences, i.e., of lists
of (prefix, name) pair with the desired overlap and seq_length N:
[(prefix1, name1), (prefix1, name2), .., (prefix1, nameN)]
[(prefix1, name(N-overlap), (prefix1, name(N-overlap+1)), ..,
(prefix1, name(N-overlap+N)]
'''
names_sequences = {}
seq_length = max(self.seq_length, 1)
# Cycle over prefix/subset/video/category/...
for prefix, names in self.names_per_subset.items():
# Repeat the first and last elements so that the first and last
# sequences are filled with repeated elements up/from the
# middle element.
if self.return_extended_sequences:
names = ([names[0]] * (seq_length // 2) + names +
[names[-1]] * (seq_length // 2))
# Fill sequences with multiple el with form
# [(prefix, name1), (prefix, name2), ...]. The names here
# have overlap = (seq_length - 1), i.e., "stride" = 1
sequences = [el for el in overlap_grouper(
names, seq_length, prefix=prefix)]
# Sequences of frames with the requested overlap
sequences = sequences[::seq_length - self.overlap]
names_sequences[prefix] = sequences
self.names_sequences = names_sequences