app/functions/video_url_handler.py

from datetime import datetime
from uuid import uuid4
from tempfile import TemporaryDirectory
from .s3_handler import upload_file
from app.scripts import synthesise_audio
from .helper import download_audio, download_video, m4a_to_wav, audio_to_srt, merge_video_audio
from app.constants import MALE_LANGUAGES, FEMALE_LANGUAGES

def handler_video_url(url, from_lang, to_lang, gender):
    with TemporaryDirectory(dir=".") as tempdir:
        srt_file = f"{tempdir}/audio.srt"
        video_file = f"{tempdir}/video.mp4"
        audio_file = f"{tempdir}/audio.m4a"
        audio_wav_file = f"{tempdir}/audio.wav"
        translated_video = f"{tempdir}/translated_video.mp4"
        download_audio(url, audio_file)
        download_video(url, video_file)
        m4a_to_wav(audio_file, audio_wav_file)
        language_code = MALE_LANGUAGES[from_lang][0]
        audio_to_srt(language_code, audio_wav_file, srt_file)

        if gender.lower() == "male":
            language_code = MALE_LANGUAGES[to_lang][0]
            voice_name = MALE_LANGUAGES[to_lang][1]
        else:
            language_code = FEMALE_LANGUAGES[to_lang][0]
            voice_name = FEMALE_LANGUAGES[to_lang][1]

        result = synthesise_audio(
            srt_file=srt_file,
            video_file=video_file,
            output_folder=tempdir,
            language_code=language_code,
            voice_name=voice_name,
            from_lang=from_lang,
            to_lang=to_lang,
            gender=gender,
        )
        translated_srt = result["translated_subtitle"]
        translated_audio = result["translated_audio"]
        merge_video_audio(video_file, translated_audio, translated_video)

        now = datetime.now()
        today = now.strftime("%Y-%m-%d")
        id = f"{today}/{str(uuid4()).replace('-', '')[:15]}"
        srt_url = upload_file(srt_file, "expressapi", id, "subtitle.srt")
        translated_srt_url = upload_file(
            translated_srt, "expressapi", id, "translated_subtitle.srt"
        )
        translated_audio_url = upload_file(
            translated_audio, "expressapi", id, "translated_audio.mp3"
        )
        translated_video_url = upload_file(translated_video, "expressapi", id, "translated_video.mp4")
        return {
            "srt_url": srt_url,
            "video_url": translated_video_url,
            "translated_srt_url": translated_srt_url,
            "translated_audio_url": translated_audio_url,
        }