command.bash

#!/bin/bash
set -euo pipefail

INPUT=./lhotseWorkspace/final_fixed.jsonl.gz
OUTDIR=~/shar_data_set_v67
SHARD_SIZE=2000

# Count total cuts so we can render a progress bar.
echo "Counting cuts in $INPUT ..."
TOTAL=$(zcat "$INPUT" | wc -l)
echo "Total cuts: $TOTAL"

progress_bar() {
    local done=$1 total=$2 width=40
    local pct=0
    (( total > 0 )) && pct=$(( done * 100 / total ))
    local filled=$(( pct * width / 100 ))
    local bar
    bar=$(printf '%*s' "$filled" '' | tr ' ' '#')
    bar=$bar$(printf '%*s' "$(( width - filled ))" '')
    printf '\r[%s] %3d%% (%d/%d cuts)' "$bar" "$pct" "$done" "$total"
}

# Background watcher: each completed shard holds SHARD_SIZE cuts.
mkdir -p "$OUTDIR"
(
    while true; do
        shards=$(find "$OUTDIR" -maxdepth 1 -name 'cuts.*.jsonl.gz' 2>/dev/null | wc -l)
        done=$(( shards * SHARD_SIZE ))
        (( done > TOTAL )) && done=$TOTAL
        progress_bar "$done" "$TOTAL"
        (( done >= TOTAL )) && break
        sleep 2
    done
) &
WATCHER=$!

LHOTSE_AUDIO_BACKEND=LibsndfileBackend lhotse shar export -j 4 --fault-tolerant --shard-size "$SHARD_SIZE" -vvv --audio opus "$INPUT" "$OUTDIR"

kill "$WATCHER" 2>/dev/null || true
wait "$WATCHER" 2>/dev/null || true
progress_bar "$TOTAL" "$TOTAL"
printf '\nDone.\n'