Extracting Subtitles from Video file using FFmpeg & Translating using Python Script

Step 1: Check available subtitle streams

ffmpeg -i your_movie.mkv

Step 2: Extract the subtitle

ffmpeg -i your_movie.mkv -map 0:2 subtitles_ita.srt

Now we have the .srt file extracted in the chosen directory

Translating .srt file to English by Using Python Script

Step 1: Install deep-translator

py -3 -m pip install deep-translator

Python Script:

from deep_translator import GoogleTranslator

input_file = r"D:\Test\subtitles_ita.srt"
output_file = r"D:\Test\subtitles_en.srt"

translator = GoogleTranslator(source='it', target='en')

with open(input_file, "r", encoding="utf-8") as f:
    content = f.read()

blocks = content.strip().split("\n\n")
translated_blocks = []

for block in blocks:
    lines = block.split("\n")

    if len(lines) < 3:
        translated_blocks.append(block)
        continue

    number = lines[0]
    timestamp = lines[1]
    dialogue = " ".join(lines[2:])

    try:
        translated_dialogue = translator.translate(dialogue)
        if not translated_dialogue:
            translated_dialogue = dialogue  # fallback if empty
    except Exception:
        translated_dialogue = dialogue  # fallback if error

    new_block = f"{number}\n{timestamp}\n{translated_dialogue}"
    translated_blocks.append(new_block)

translated_content = "\n\n".join(translated_blocks)

with open(output_file, "w", encoding="utf-8") as f:
    f.write(translated_content)

print("✅ Translation complete (with fallback protection)!")

Successfully translated the .srt file and saved a new copy!

Easy Method : Use Subtitle Edit

Open subtitles_ita.srt in Subtitle Edit

Go to: Auto-translate → Google Translate Choose: → From: Italian → To: English Click Translate → Save as subtitles_en.srt