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make it more efficient to locate where to sample the frame

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twu
2025-08-21 09:13:45 +00:00
parent e014cad820
commit e3f47a799b
1 changed files with 6 additions and 1 deletions
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7
diffsynth/trainers/utils.py
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@@ -283,11 +283,16 @@ class VideoDataset(torch.utils.data.Dataset):
# make a ((start,end),frameid) struct
start_end_idx_map = [((sum(delays[:i]), sum(delays[:i+1])), i) for i in range(len(delays))]
_frames = []
# according gemini-code-assist, make it more efficient to locate
# where to sample the frame
last_match = 0
for i in range(sum(delays) // minimal_interval):
current_time = minimal_interval * i
for ((start, end), frame_idx) in start_end_idx_map:
for idx, ((start, end), frame_idx) in enumerate(start_end_idx_map[last_match:]):
if start <= current_time < end:
_frames.append(frames[frame_idx])
last_match = idx + last_match
break
frames = _frames
return frames