Command-line interface¶
lhotse obtain¶
Command group for download and extract data.
lhotse obtain [OPTIONS] COMMAND [ARGS]...
heroico¶
heroico download.
lhotse obtain heroico [OPTIONS] TARGET_DIR
Arguments
-
TARGET_DIR¶ Required argument
librimix¶
Mini LibriMix download.
lhotse obtain librimix [OPTIONS] TARGET_DIR
Arguments
-
TARGET_DIR¶ Required argument
lhotse prepare¶
Command group with data preparation recipes.
lhotse prepare [OPTIONS] COMMAND [ARGS]...
broadcast-news¶
English Broadcast News 1997 data preparation. It will output three manifests: for recordings, topic sections, and speech segments. It supports the following LDC distributions:
This data is not available for free - your institution needs to have an LDC subscription.
lhotse prepare broadcast-news [OPTIONS] AUDIO_DIR TRANSCRIPT_DIR OUTPUT_DIR
Arguments
-
AUDIO_DIR¶ Required argument
-
TRANSCRIPT_DIR¶ Required argument
-
OUTPUT_DIR¶ Required argument
heroico¶
heroico Answers ASR data preparation.
lhotse prepare heroico [OPTIONS] SPEECH_DIR TRANSCRIPT_DIR OUTPUT_DIR
Arguments
-
SPEECH_DIR¶ Required argument
-
TRANSCRIPT_DIR¶ Required argument
-
OUTPUT_DIR¶ Required argument
librimix¶
LibrMix source separation data preparation.
lhotse prepare librimix [OPTIONS] LIBRIMIX_CSV OUTPUT_DIR
Options
-
--sampling-rate<sampling_rate>¶ Sampling rate to set in the RecordingSet manifest.
-
--min-segment-seconds<min_segment_seconds>¶ Remove segments shorter than MIN_SEGMENT_SECONDS.
-
--with-precomputed-mixtures,--no-precomputed-mixtures¶ Optionally create an RecordingSet manifest including the precomputed LibriMix mixtures.
Arguments
-
LIBRIMIX_CSV¶ Required argument
-
OUTPUT_DIR¶ Required argument
mini-librispeech¶
Mini Librispeech ASR data preparation.
lhotse prepare mini-librispeech [OPTIONS] CORPUS_DIR OUTPUT_DIR
Arguments
-
CORPUS_DIR¶ Required argument
-
OUTPUT_DIR¶ Required argument
switchboard¶
The Switchboard corpus preparation.
This data is not available for free - your institution needs to have an LDC subscription.
lhotse prepare switchboard [OPTIONS] AUDIO_DIR OUTPUT_DIR
Options
-
--transcript-dir<transcript_dir>¶
-
--sentiment-dir<sentiment_dir>¶ Optional path to LDC2020T14 package with sentiment annotations for SWBD.
-
--omit-silence,--retain-silence¶ Should the [silence] segments be kept.
Arguments
-
AUDIO_DIR¶ Required argument
-
OUTPUT_DIR¶ Required argument
lhotse cut¶
Group of commands used to create CutSets.
lhotse cut [OPTIONS] COMMAND [ARGS]...
append¶
Create a new CutSet by appending the cuts in CUT_MANIFESTS. CUT_MANIFESTS are iterated position-wise (the cuts on i’th position in each manfiest are appended to each other). The cuts are appended in the order in which they appear in the input argument list. If CUT_MANIFESTS have different lengths, the script stops once the shortest CutSet is depleted.
lhotse cut append [OPTIONS] [CUT_MANIFESTS]... OUTPUT_CUT_MANIFEST
Arguments
-
CUT_MANIFESTS¶ Optional argument(s)
-
OUTPUT_CUT_MANIFEST¶ Required argument
mix-by-recording-id¶
Create a CutSet stored in OUTPUT_CUT_MANIFEST by matching the Cuts from CUT_MANIFESTS by their recording IDs and mixing them together.
lhotse cut mix-by-recording-id [OPTIONS] [CUT_MANIFESTS]...
OUTPUT_CUT_MANIFEST
Arguments
-
CUT_MANIFESTS¶ Optional argument(s)
-
OUTPUT_CUT_MANIFEST¶ Required argument
mix-sequential¶
Create a CutSet stored in OUTPUT_CUT_MANIFEST by iterating jointly over CUT_MANIFESTS and mixing the Cuts on the same positions. E.g. the first output cut is created from the first cuts in each input manifest. The mix is performed by summing the features from all Cuts. If the CUT_MANIFESTS have different number of Cuts, the mixing ends when the shorter manifest is depleted.
lhotse cut mix-sequential [OPTIONS] [CUT_MANIFESTS]... OUTPUT_CUT_MANIFEST
Arguments
-
CUT_MANIFESTS¶ Optional argument(s)
-
OUTPUT_CUT_MANIFEST¶ Required argument
pad¶
Create a new CutSet by padding the cuts in CUT_MANIFEST. The cuts will be right-padded, i.e. the padding is placed after the signal ends.
lhotse cut pad [OPTIONS] CUT_MANIFEST OUTPUT_CUT_MANIFEST
Options
-
-d,--duration<duration>¶ Desired duration of cuts after padding. Cuts longer than this won’t be affected. By default, pad to the longest cut duration found in CUT_MANIFEST.
Arguments
-
CUT_MANIFEST¶ Required argument
-
OUTPUT_CUT_MANIFEST¶ Required argument
random-mixed¶
Create a CutSet stored in OUTPUT_CUT_MANIFEST that contains supervision regions from SUPERVISION_MANIFEST and features supplied by FEATURE_MANIFEST. It first creates a trivial CutSet, splits it into two equal, randomized parts and mixes their features. The parameters of the mix are controlled via SNR_RANGE and OFFSET_RANGE.
lhotse cut random-mixed [OPTIONS] SUPERVISION_MANIFEST FEATURE_MANIFEST
OUTPUT_CUT_MANIFEST
Options
-
-s,--snr-range<snr_range>¶ Range of SNR values (in dB) that will be uniformly sampled in order to mix the signals.
-
-o,--offset-range<offset_range>¶ Range of relative offset values (0 - 1), which will offset the “right” signal by this many times the duration of the “left” signal. It is uniformly sampled for each mix operation.
Arguments
-
SUPERVISION_MANIFEST¶ Required argument
-
FEATURE_MANIFEST¶ Required argument
-
OUTPUT_CUT_MANIFEST¶ Required argument
simple¶
Create a CutSet stored in OUTPUT_CUT_MANIFEST. Depending on the provided options, it may contain any combination of recording, feature and supervision manifests. Either RECORDING_MANIFEST or FEATURE_MANIFEST has to be provided. When SUPERVISION_MANIFEST is provided, the cuts time span will correspond to that of the supervision segments. Otherwise, that time span corresponds to the one found in features, if available, otherwise recordings.
lhotse cut simple [OPTIONS] OUTPUT_CUT_MANIFEST
Options
-
-r,--recording-manifest<recording_manifest>¶ Optional recording manifest - will be used to attach the recordings to the cuts.
-
-f,--feature-manifest<feature_manifest>¶ Optional feature manifest - will be used to attach the features to the cuts.
-
-s,--supervision_manifest<supervision_manifest>¶ Optional supervision manifest - will be used to attach the supervisions to the cuts.
Arguments
-
OUTPUT_CUT_MANIFEST¶ Required argument
truncate¶
Truncate the cuts in the CUT_MANIFEST and write them to OUTPUT_CUT_MANIFEST. Cuts shorter than MAX_DURATION will not be modified.
lhotse cut truncate [OPTIONS] CUT_MANIFEST OUTPUT_CUT_MANIFEST
Options
-
--preserve-id¶ Should the cuts preserve IDs (by default, they will get new, random IDs)
-
-d,--max-duration<max_duration>¶ The maximum duration in seconds of a cut in the resulting manifest. [required]
-
-o,--offset-type<offset_type>¶ Where should the truncated cut start: “start” - at the start of the original cut, “end” - MAX_DURATION before the end of the original cut, “random” - randomly choose somewhere between “start” and “end” options.
- Options
start|end|random
-
--keep-overflowing-supervisions,--discard-overflowing-supervisions¶ When a cut is truncated in the middle of a supervision segment, should the supervision be kept.
Arguments
-
CUT_MANIFEST¶ Required argument
-
OUTPUT_CUT_MANIFEST¶ Required argument
windowed¶
Create a CutSet stored in OUTPUT_CUT_MANIFEST from feature regions in FEATURE_MANIFEST. The feature matrices are traversed in windows with CUT_SHIFT increments, creating cuts of constant CUT_DURATION.
lhotse cut windowed [OPTIONS] FEATURE_MANIFEST OUTPUT_CUT_MANIFEST
Options
-
-d,--cut-duration<cut_duration>¶ How long should the cuts be in seconds.
-
-s,--cut-shift<cut_shift>¶ How much to shift the cutting window in seconds (by default the shift is equal to CUT_DURATION).
-
--keep-shorter-windows,--discard-shorter-windows¶ When true, the last window will be used to create a Cut even if its duration is shorter than CUT_DURATION.
Arguments
-
FEATURE_MANIFEST¶ Required argument
-
OUTPUT_CUT_MANIFEST¶ Required argument
lhotse manifest¶
Generic commands working with all or most manifest types.
lhotse manifest [OPTIONS] COMMAND [ARGS]...
combine¶
Load MANIFESTS, combine them into a single one, and write it to OUTPUT_MANIFEST.
lhotse manifest combine [OPTIONS] [MANIFESTS]... OUTPUT_MANIFEST
Arguments
-
MANIFESTS¶ Optional argument(s)
-
OUTPUT_MANIFEST¶ Required argument
filter¶
Filter a MANIFEST according to the rule specified in PREDICATE, and save the result to OUTPUT_MANIFEST. It is intended to work generically with most manifest types - it supports RecordingSet, SupervisionSet and CutSet.
It currently only supports comparison of numerical manifest item attributes, such as: start, duration, end, channel, num_frames, num_features, etc.
lhotse manifest filter [OPTIONS] PREDICATE MANIFEST OUTPUT_MANIFEST
Arguments
-
PREDICATE¶ Required argument
-
MANIFEST¶ Required argument
-
OUTPUT_MANIFEST¶ Required argument
split¶
Load MANIFEST, split it into NUM_SPLITS equal parts and save as separate manifests in OUTPUT_DIR.
lhotse manifest split [OPTIONS] NUM_SPLITS MANIFEST OUTPUT_DIR
Options
-
--randomize¶ Optionally randomize the sequence before splitting.
Arguments
-
NUM_SPLITS¶ Required argument
-
MANIFEST¶ Required argument
-
OUTPUT_DIR¶ Required argument
lhotse feat¶
Feature extraction related commands.
lhotse feat [OPTIONS] COMMAND [ARGS]...
extract¶
Extract features for recordings in a given AUDIO_MANIFEST. The features are stored in OUTPUT_DIR, with one file per recording (or segment).
lhotse feat extract [OPTIONS] RECORDING_MANIFEST OUTPUT_DIR
Options
-
-a,--augmentation<augmentation>¶ Optional time-domain data augmentation effect chain to apply.
- Options
pitch|reverb|pitch_reverb_tdrop
-
-f,--feature-manifest<feature_manifest>¶ Optional manifest specifying feature extractor configuration.
-
--storage-type<storage_type>¶ Select a storage backend for the feature matrices.
- Options
lilcom_files|lilcom_hdf5|numpy_files|numpy_hdf5
-
-t,--lilcom-tick-power<lilcom_tick_power>¶ Determines the compression accuracy; the input will be compressed to integer multiples of 2^tick_power
-
-r,--root-dir<root_dir>¶ Root directory - all paths in the manifest will use this as prefix.
-
-j,--num-jobs<num_jobs>¶ Number of parallel processes.
Arguments
-
RECORDING_MANIFEST¶ Required argument
-
OUTPUT_DIR¶ Required argument
lhotse convert-kaldi¶
Convert a Kaldi data dir DATA_DIR into a directory MANIFEST_DIR of lhotse manifests. Ignores feats.scp. The SAMPLING_RATE has to be explicitly specified as it is not available to read from DATA_DIR.
lhotse convert-kaldi [OPTIONS] DATA_DIR SAMPLING_RATE MANIFEST_DIR
Arguments
-
DATA_DIR¶ Required argument
-
SAMPLING_RATE¶ Required argument
-
MANIFEST_DIR¶ Required argument