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Fix skipme handling #13244

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Fix skipme handling #13244

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monica-sekoyan
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What does this PR do ?

Skipme filtering was not handled before for the cases when data was provided with input_cfg to Lhotse Dataloader config.

Collection: [Note which collection this PR will affect]

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if len(cuts) > 1:
# Before we mix the datasets in the config, we filter cutsets to exclude cuts
# with valid "_skipme" values to mix the data correctly.
cuts = [cut.filter(PlaceholderFilter()) for cut in cuts]
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is this necessary? Don;t samples with _skipme already get filtered in read_cutset_from_config function with PlaceholderFilter there ?

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we need to filter before cuts will get mixed with the specified weights, because if we mix n samples vs n - n_skipme_samples, resulted cutset will be different

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in read_cutset_from_config we do the filtering for non-merged cutsets, but I think I can change the place of the filtering to do one for both cases

@nithinraok nithinraok added skip-linting Run CICD r2.3.0 Pick this label for auto-cherrypicking into v2.3.0 labels Apr 24, 2025
@github-actions github-actions bot removed the Run CICD label Apr 26, 2025
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[🤖]: Hi @monica-sekoyan 👋,

We wanted to let you know that a CICD pipeline for this PR just finished successfully

So it might be time to merge this PR or get some approvals

I'm just a bot so I'll leave it you what to do next.

//cc @pablo-garay @ko3n1g

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@nithinraok the CI tests passed. Please review the PR when you get a chance.

Signed-off-by: Monica Sekoyan <[email protected]>
monica-sekoyan and others added 2 commits April 26, 2025 13:09
Signed-off-by: Monica Sekoyan <[email protected]>
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@pzelasko @nithinraok what do you think about this new implementation?
I think moving _skipme handling to iter of the main iterators is safer approach and also we skip reading that samples into cutset, pretokenizing them etc. so it is also more efficient

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I stopped the CI pipeline since there was a unit test failure already. Please take a look at that and also probably best to get a review on the latest chagnes before retrying again.
https://github.com/NVIDIA/NeMo/actions/runs/14689676163/job/41232582567

@github-actions github-actions bot removed the Run CICD label Apr 27, 2025
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