Combine XL splits lazily during training.

egs/librispeech/ASR/local/test_load_XL_split.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+# Copyright      2022  Xiaomi Corp.        (authors: Fangjun Kuang)
+#
+# See ../../../../LICENSE for clarification regarding multiple authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+This file can be used to check if any split is corrupted.
+"""
+
+import glob
+import re
+
+import lhotse
+
+
+def main():
+    d = "data/fbank/XL_split_2000"
+    filenames = list(glob.glob(f"{d}/cuts_XL.*.jsonl.gz"))
+
+    pattern = re.compile(r"cuts_XL.([0-9]+).jsonl.gz")
+
+    idx_filenames = [(int(pattern.search(c).group(1)), c) for c in filenames]
+
+    idx_filenames = sorted(idx_filenames, key=lambda x: x[0])
+
+    print(f"Loading {len(idx_filenames)} splits")
+
+    s = 0
+    for i, f in idx_filenames:
+        cuts = lhotse.load_manifest_lazy(f)
+        print(i, "filename", f)
+        for i, c in enumerate(cuts):
+            s += c.features.load().shape[0]
+            if i > 5:
+                break
+
+
+if __name__ == "__main__":
+    main()

egs/librispeech/ASR/prepare_giga_speech.sh

@@ -139,11 +139,3 @@ if [ $stage -le 5 ] && [ $stop_stage -ge 5 ]; then
     --batch-duration 600 \
     --num-splits $num_splits
 fi
-
-if [ $stage -le 6 ] && [ $stop_stage -ge 6 ]; then
-  log "Stage 6: Combine features for XL"
-  if [ ! -f data/fbank/cuts_XL.jsonl.gz ]; then
-    pieces=$(find data/fbank/XL_split_${num_splits} -name "cuts_XL.*.jsonl.gz")
-    lhotse combine $pieces data/fbank/cuts_XL.jsonl.gz
-  fi
-fi

egs/librispeech/ASR/pruned_transducer_stateless3/gigaspeech.py

@@ -16,9 +16,11 @@
 # limitations under the License.
 
 
+import glob
 import logging
 from pathlib import Path
 
+import lhotse
 from lhotse import CutSet, load_manifest
 
 
@@ -40,9 +42,14 @@ class GigaSpeech:
         self.manifest_dir = Path(manifest_dir)
 
     def train_XL_cuts(self) -> CutSet:
-        f = self.manifest_dir / "cuts_XL_raw.jsonl.gz"
+        logging.info("About to get train-XL cuts")
-        logging.info(f"About to get train-XL cuts from {f}")
+
-        return CutSet.from_jsonl_lazy(f)
+        filenames = list(
+            glob.glob(f"{self.manifest_dir}/XL_split_2000/cuts_XL.*.jsonl.gz")
+        )
+        logging.info(f"Loading {len(filenames)} splits")
+
+        return lhotse.combine(lhotse.load_manifest_lazy(p) for p in filenames)
 
     def train_L_cuts(self) -> CutSet:
         f = self.manifest_dir / "cuts_L_raw.jsonl.gz"

egs/librispeech/ASR/pruned_transducer_stateless3/train.py

@@ -986,7 +986,7 @@ def run(rank, world_size, args):
     giga_train_dl = asr_datamodule.train_dataloaders(
         train_giga_cuts,
         dynamic_bucketing=True,
-        on_the_fly_feats=True,
+        on_the_fly_feats=False,
         cuts_musan=cuts_musan,
     )