subtoaudio 0.1.4

Subtitle to Audio, generate audio or speech from any subtitle file

Subtitle to Audio

Subtitle to audio, generate audio from any subtitle file using Coqui-ai TTS and synchronize the audio timing according to subtitle time.

Demo :

Dependencies

ffmpeg, pydub, librosa, coqui-ai TTS, ffmpeg-python

Installation

pip install git+https://github.com/bnsantoso/sub-to-audio

pip install subtoaudio

ffmpeg on linux

apt-get install ffmpeg

Example usage

Basic use is very similiar to Coqui-ai TTS, you can check their documentation and the <lang-iso_code>.

!Note: Use non-overlapping subtitles with an optimal Character per Second / CPS for best result

from subtoaudio import SubToAudio

#Using the Fairseq English speaker model as the default
#The code will output 'yoursubtitle.wav' in the current directory.
sub = SubToAudio(gpu=True)
subtitle = sub.subtitle("yoursubtitle.srt")
sub.convert_to_audio(sub_data=subtitle)

#you can choose 1100 different language using fairseq model
sub = SubToAudio(language='<lang-iso_code>')
subtitle = sub.subtitle("yoursubtitle.ass")
sub.convert_to_audio(sub_data=subtitle) 

#specify model name
sub = SubToAudio(model_name="tts_models/multilingual/multi-dataset/your_tts")
subtitle = sub.subtitle("yoursubtitle.srt")
sub.convert_to_audio(sub_data=subtitle, output_path="subtitle.wav")

#specify model and config path
sub = SubToAudio(model_path="path/to/your/model.pth" config_path="config/path.json")
subtitle = sub.subtitle("yoursubtitle.srt")
sub.convert_to_audio(sub_data=subtitle)

#By default, it is using "speaker=tts.speakers[0]/None, 
#language=tts.languages[0]/None, speaker_wav=None
sub = SubToAudio(model_name="tts_models/multilingual/multi-dataset/your_tts")
subtitle = sub.subtitle("yoursubtitle.srt")
sub.convert_to_audio(sub_data=subtitle, language="en", speaker="speakername", speaker_wav="your/path/speaker.wav", output_path="subtitle.wav")

#Save temporary audio to current folder
sub = SubToAudio(model_name="tts_models/multilingual/multi-dataset/your_tts")
subtitle = sub.subtitle("yoursubtitle.srt")
sub.convert_to_audio(sub_data=subtitle, output_path="subtitle.wav", save_temp=True)

Tempo Mode

Use the tempo_mode parameter to speed up the audio. There are three tempo modes:

• tempo_mode="all" : This accelerates all audio. Use tempo_speed=float to specify the speed.
• tempo_mode="overflow" : This accelerates the audio to match the total subtitle duration plus the blank duration before the next subtitle appears. 'tempo_limit' will limit the speed increase during overflow.
• tempo_mode="precise" : This accelerates the audio to match the duration the subtitle appears."

from subtoaudio import SubToAudio

#Speed up tempo or speech rate
sub = SubToAudio(gpu=True)
subtitle = sub.subtitle("yoursubtitle.srt")
sub.convert_to_audio(sub_data=subtitle, tempo_mode="all", tempo_speed=1.3)

#Change the tempo or speech rate of all audio files , default is 1.2
sub = SubToAudio(gpu=True)
subtitle = sub.subtitle("yoursubtitle.srt")
sub.convert_to_audio(sub_data=subtitle, tempo_mode="all", tempo_speed=1.3)

#Change tempo or speech rate to audio that doesn't match the subtitle duration
sub = SubToAudio(gpu=True)
subtitle = sub.subtitle("yoursubtitle.srt")
sub.convert_to_audio(sub_data=subtitle, tempo_mode="overflow")

#Limit tempo speed on the overflow mode 
sub.convert_to_audio(sub_data=subtitle, tempo_mode="overflow", tempo_limit=1.2)

#Match audio length to subtitle duration
sub = SubToAudio(gpu=True)
subtitle = sub.subtitle("yoursubtitle.srt")
sub.convert_to_audio(sub_data=subtitle, tempo_mode="precise")

Shift Mode

shift_mode parameter will shift audio that doesnt match subtitle duration.

• shift_mode="right" : Shift audio time to the right and prevent audio overlaping.
• shift_mode="left" : Shift audio to the left and prevent audio overlap, but be cautious of limited space on the left side, as some audio may disappear.
• shift_mode="interpose" : Shift audio to mid position and prevent right and left of audio overlaping. (Note: This mode can be clunky, so use it cautiously.)
• shift_mode="left-overlap" : Shift audio time to the left, allowing overlap.
• shift_mode="interpose-overlap" : Shift audio to mid position, allowing overlap.
• shift_limit=int or "str" : limit audio shift, use integer for millisecond or string like 2.5s for second

from subtoaudio import SubToAudio

#shift mode with limit of 2 second to the right.
sub = SubToAudio(languages="vie", gpu=True)
subtitle = sub.subtitle("yoursubtitle.srt")
sub.convert_to_audio(sub_data=sub, tempo_mode="overflow", shift_mode="right", limit_shift="2s")

#shift audio to left position or, time before next subtitle appear
sub = SubToAudio(languages="fra" gpu=True)
subtitle = sub.subtitle("yoursubtitle.srt")
sub.convert_to_audio(sub_data=sub, shift_mode="left-overlap")

#shift to left, and limit shift only 1 sec.
sub = SubToAudio(gpu=False)
subtitle = sub.subtitle("yoursubtitle.srt")
sub.convert_to_audio(sub_data=sub, shift_mode="left", shift_limit=1000) #1000 = 1s

Citation

Eren, G., & The Coqui TTS Team. (2021). Coqui TTS (Version 1.4) [Computer software]. https://doi.org/10.5281/zenodo.6334862