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fix vid dataloader frame selection #705

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merged 1 commit into from
Oct 9, 2024
Merged

fix vid dataloader frame selection #705

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23 changes: 21 additions & 2 deletions data/self_supervised_vid_mask_online_dataset.py
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Original file line number Diff line number Diff line change
Expand Up @@ -87,6 +87,19 @@ def __init__(self, opt, phase, name=""):
cumulative_sum += count_minus
self.cumulative_sums.append(cumulative_sum)

# Iterate through each video series to get available frame pool
self.available_frame_pool = []
start_count = 0
for i in range(len(self.cumulative_sums)):
num_frames = (
self.cumulative_sums[i] - self.cumulative_sums[i - 1]
if i != 0
else self.cumulative_sums[i]
)
end_count = start_count + num_frames
self.available_frame_pool.append(list(range(start_count, end_count)))
start_count = end_count

def get_img(
self,
A_img_path,
Expand All @@ -109,7 +122,13 @@ def get_img(
) # chose one frame from available video series

# according to the selected_index, get the video series and frame number
selected_index = bisect.bisect_left(self.cumulative_sums, random_A)
selected_index = [
i for i, t in enumerate(self.available_frame_pool) if random_A in t
]
if len(selected_index) == 1:
selected_index = selected_index[0]
else:
raise ValueError("random_A not found in any sublist, check dataset")
selected_vid = self.vid_series_paths[selected_index]
if selected_index > 0:
frame_num = random_A - self.cumulative_sums[selected_index - 1]
Expand All @@ -123,7 +142,7 @@ def get_img(
]

# Get path and index_A
selected_path = filtered_paths[frame_num - 1]
selected_path = filtered_paths[frame_num]
index_A = self.A_img_paths.index(selected_path)

images_A = []
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