NVIDIA/DALI

Question on video loading

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#3,907 opened on May 16, 2022

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PyTorch LightningVideohelp wanted

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Description

@JanuszL and team hope you're doing OK. I have a pytorch video model that assumes each batch element is a five-frame video sequence around a frame at index ind, i.e., [ind-2, ind-1, ind, ind+1, ind+2]. Now, I need to pass a batch of such sequences to that model, ie.,

seqs = []
for ind in range(batch_size):
    seq = # images [ind-2, ind-1, ind, ind+1, ind+2]
    seqs.append(seq)

I have a vision of how to do this in pytorch after getting the sequence from DALI. is there a simpler way to do this in DALI?

Contributor guide

Research direction
Investigate DALI's sequence loading capabilities, such as using fn.sequence reader or readers.video with sequence output. Look for examples in DALI documentation or community forums.
Tech stack
pythonpytorch
Domain
datamachine learning
Issue type
Research
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonPyTorchGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70