Datasets:
File size: 3,369 Bytes
32adf42 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 |
import csv
import os
from typing import Literal
import pysrt
from pydub import AudioSegment
def srt_to_segments_with_metadata(srt_file, episode, audio_file, output_dir, metadata_file, subset: Literal["saamgwokjinji", "seoiwuzyun"]):
# Load the SRT file
subs = pysrt.open(srt_file)
# Load the audio file (handling Opus)
try:
audio = AudioSegment.from_file(audio_file, codec="opus")
except Exception as e:
print(f"Error loading audio file: {audio_file}")
print(f"Error message: {e}")
return # Skip this file and move to the next
# Ensure the output directory exists
os.makedirs(output_dir, exist_ok=True)
# Prepare the metadata file (appending to a single file)
with open(metadata_file, mode='a', newline='', encoding='utf-8') as csvfile:
csvwriter = csv.writer(csvfile)
# Write header row if the file is empty
if os.stat(metadata_file).st_size == 0:
csvwriter.writerow(['id', 'episode_id', 'file_name', 'audio_duration', 'transcription'])
if subset == "saamgwokjinji":
prefix = "sg"
elif subset == "seoiwuzyun":
prefix = "sw"
for index, sub in enumerate(subs):
# Get start and end times in milliseconds
start_time = sub.start.ordinal
end_time = sub.end.ordinal
# Calculate duration in seconds
duration = (end_time - start_time) / 1000
# Extract the audio segment
segment = audio[start_time:end_time]
# Define output filenames (using .opus extension)
segment_filename = f"{episode}_{index + 1:03d}.opus"
segment_id = f"{prefix}_{episode}_{index + 1:03d}"
audio_filename = os.path.join(output_dir, segment_filename)
# Export the audio segment as Opus
try:
segment.export(audio_filename, format="opus", codec="libopus")
except Exception as e:
print(f"Error exporting segment: {audio_filename}")
print(f"Error message: {e}")
continue # Skip to the next segment
# Write to the metadata CSV file
csvwriter.writerow(
[segment_id, episode, f'{episode}/{segment_filename}', f'{duration:.3f}', sub.text])
print(f"Segmentation of {audio_file} complete. Files saved to: {output_dir}")
print(f"Metadata appended to: {metadata_file}")
if __name__ == "__main__":
# subset = "saamgwokjinji"
subset = "seoiwuzyun"
print(f"Processing subset: {subset}")
# If append to existing metadata file
metadata_file = os.path.join("opus", subset, "metadata.csv") # Define metadata file path here
for episode in range(46, 51):
# If creating new csv
# metadata_file = f"{episode}.csv"
episode_str = f'{episode:03d}' # Format episode as 3-digit string
srt_file = f'srt/{subset}/{episode_str}.srt'
audio_file = f'source/{subset}/{episode_str}.opus'
output_dir = f'opus/{subset}/{episode_str}'
# Only process if the audio file exists
if os.path.exists(audio_file):
srt_to_segments_with_metadata(srt_file, episode_str, audio_file, output_dir, metadata_file, subset)
else:
print(f"Audio file not found: {audio_file}. Skipping.")
|