stream-translator-gpt

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stream-translator-gpt is a command-line tool for real-time transcription and translation of live streams. We have now added an easier-to-use WebUI entry point.

Try it on Colab:

WebUI	Command Line

(Due to frequent scraping and theft of API keys, we are unable to provide a trial API key. You need to fill in your own API key.)

Pipeline

flowchart LR
    subgraph ga["`**Input**`"]
        direction LR
        aa("`**FFmpeg**`")
        ab("`**Device audio**`")
        ac("`**yt-dlp**`")
        ad("`**Local media file**`")
        ae("`**Live streaming**`")
        ac --> aa
        ad --> aa
        ae --> ac
    end
    subgraph gb["`**Audio Slicing**`"]
        direction LR
        ba("`**Silero VAD**`")
    end
    subgraph gc["`**Transcription**`"]
        direction LR
        ca("`**Whisper**`")
        cb("`**Faster-Whisper**`")
        cc("`**Simul Streaming**`")
        cd("`**OpenAI Transcription API**`")
    end
    subgraph gd["`**Translation**`"]
        direction LR
        da("`**GPT API**`")
        db("`**Gemini API**`")
    end
    subgraph ge["`**Output**`"]
        direction LR
        ea("`**Print to terminal**`")
        ee("`**Save to file**`")
        ec("`**Discord**`")
        ed("`**Telegram**`")
        eb("`**Cqhttp**`")
    end
    aa --> gb
    ab --> gb
    gb ==> gc
    gc ==> gd
    gd ==> ge

Loading

Uses yt-dlp to extract audio data from live streams.

Dynamic threshold audio slicing based on Silero-VAD.

Use Whisper / Faster-Whisper / Simul Streaming locally or call OpenAI Transcription API remotely for transcription.

Use OpenAI's GPT API / Google's Gemini API for translation.

Finally, the results can be printed to the terminal, saved to a file, or sent to a group via social media bot.

Prerequisites

Linux or Windows:

1. Python >= 3.8 (Recommend >= 3.10)
2. Install CUDA on your system.
3. Install cuDNN to your CUDA dir if you want to use Faster-Whisper.
4. Install PyTorch (with CUDA) to your Python.
5. Create a Google API key if you want to use Gemini API for translation.
6. Create a OpenAI API key if you want to use OpenAI Transcription API for transcription or GPT API for translation.

If you are in Windows, you also need to:

1. Install and add ffmpeg to your PATH.
2. Install yt-dlp and add it to your PATH.

WebUI

pip install stream-translator-gpt[webui] -U
stream-translator-gpt-webui

Command Line

Install release version from PyPI:

pip install stream-translator-gpt -U
stream-translator-gpt

or

Clone master version code from Github:

git clone https://github.com/ionic-bond/stream-translator-gpt.git
pip install -r ./stream-translator-gpt/requirements.txt -U
python3 ./stream-translator-gpt/stream_translator_gpt/main.py

Usage

The commands on Colab are the recommended usage, below are some other commonly used options.

• Transcribe live streaming (default use Whisper):

  stream-translator-gpt {URL} --model large --language {input_language}

• Transcribe by Faster-Whisper:

  stream-translator-gpt {URL} --model large --language {input_language} --use_faster_whisper

• Transcribe by SimulStreaming:

  stream-translator-gpt {URL} --model large --language {input_language} --use_simul_streaming

• Transcribe by SimulStreaming with Faster-Whisper as the encoder:

  stream-translator-gpt {URL} --model large --language {input_language} --use_simul_streaming --use_faster_whisper

• Transcribe by OpenAI Transcription API:

  stream-translator-gpt {URL} --language {input_language} --use_openai_transcription_api --openai_api_key {your_openai_key}

• Translate to other language by Gemini:

  stream-translator-gpt {URL} --model large --language ja --translation_prompt "Translate from Japanese to Chinese" --google_api_key {your_google_key}

• Translate to other language by GPT:

  stream-translator-gpt {URL} --model large --language ja --translation_prompt "Translate from Japanese to Chinese" --openai_api_key {your_openai_key}

• Using OpenAI Transcription API and Gemini at the same time:

  stream-translator-gpt {URL} --language ja --use_openai_transcription_api --openai_api_key {your_openai_key} --translation_prompt "Translate from Japanese to Chinese" --google_api_key {your_google_key}

• Local video/audio file as input:

  stream-translator-gpt /path/to/file --model large --language {input_language}

• Record system audio as input:

  stream-translator-gpt device --model large --language {input_language}

• Record microphone as input:

  stream-translator-gpt device --model large --language {input_language} --mic

• Sending result to Discord:

  stream-translator-gpt {URL} --model large --language {input_language} --discord_webhook_url {your_discord_webhook_url}

• Sending result to Telegram:

  stream-translator-gpt {URL} --model large --language {input_language} --telegram_token {your_telegram_token} --telegram_chat_id {your_telegram_chat_id}

• Sending result to Cqhttp:

  stream-translator-gpt {URL} --model large --language {input_language} --cqhttp_url {your_cqhttp_url} --cqhttp_token {your_cqhttp_token}

• Saving result to a .srt subtitle file:

  stream-translator-gpt {URL} --model large --language ja --translation_prompt "Translate from Japanese to Chinese" --google_api_key {your_google_key} --hide_transcribe_result --retry_if_translation_fails --output_timestamps --output_file_path ./result.srt

All options

Option	Default Value	Description
Overall Options
--openai_api_key		OpenAI API key if using GPT translation / Whisper API. If you have multiple keys, you can separate them with "," and each key will be used in turn.
--google_api_key		Google API key if using Gemini translation. If you have multiple keys, you can separate them with "," and each key will be used in turn.
--openai_base_url		Customize the API endpoint of OpenAI (Affects GPT translation & OpenAI Transcription).
--google_base_url		Customize the API endpoint of Google (Affects Gemini translation).
--proxy		Used to set the proxy for all --*_proxy flags if they are not specifically set. Also sets http_proxy environment variables.
Input Options
URL		The URL of the stream. If a local file path is filled in, it will be used as input. If fill in "device", the input will be obtained from your PC device.
--format	ba/wa*	Stream format code, this parameter will be passed directly to yt-dlp. You can get the list of available format codes by yt-dlp {url} -F
--list_format		Print all available formats then exit.
--cookies		Used to open member-only stream, this parameter will be passed directly to yt-dlp.
--input_proxy		Use the specified HTTP/HTTPS/SOCKS proxy for yt-dlp, e.g. http://127.0.0.1:7890.
--device_index		The index of the device that needs to be recorded. If not set, the system default recording device will be used.
--list_devices		Print all audio devices info then exit.
--device_recording_interval	0.5	The shorter the recording interval, the lower the latency, but it will increase CPU usage. It is recommended to set it between 0.1 and 1.0.
Audio Slicing Options
--min_audio_length	0.5	Minimum slice audio length in seconds.
--max_audio_length	30.0	Maximum slice audio length in seconds.
--target_audio_length	5.0	When dynamic no speech threshold is enabled (enabled by default), the program will slice the audio as close to this length as possible.
--continuous_no_speech_threshold	1.0	Slice if there is no speech during this number of seconds. If the dynamic no speech threshold is enabled (enabled by default), the actual threshold will be dynamically adjusted based on this value.
--disable_dynamic_no_speech_threshold		Set this flag to disable dynamic no speech threshold.
--prefix_retention_length	0.5	The length of the retention prefix audio during slicing.
--vad_threshold	0.35	Range 0~1. the higher this value, the stricter the speech judgment. If dynamic VAD threshold is enabled (enabled by default), this threshold will be adjusted dynamically based on the input speech's VAD results.
--disable_dynamic_vad_threshold		Set this flag to disable dynamic VAD threshold.
Transcription Options
--model	small	Select Whisper/Faster-Whisper/Simul Streaming model size. See here for available models.
--language	auto	Language spoken in the stream. See here for available languages.
--use_faster_whisper		Set this flag to use Faster-Whisper instead of Whisper. If used with --use_simul_streaming, SimulStreaming with Faster-Whisper as the encoder will be used.
--use_simul_streaming		Set this flag to use SimulStreaming instead of Whisper. If used with --use_faster_whisper, SimulStreaming with Faster-Whisper as the encoder will be used.
--use_openai_transcription_api		Set this flag to use OpenAI transcription API instead of the original local Whipser.
--transcription_filters	emoji_filter,repetition_filter	Filters apply to transcription results, separated by ",". We provide emoji_filter, repetition_filter and japanese_stream_filter.
--transcription_initial_prompt		General purpose prompt/glossary for transcription. Format: "Word1, Word2, Word3, ...". This text is always included in the prompt passed to the model.
--disable_transcription_context		Set this flag to disable context (previous sentence) propagation in transcription.
Translation Options
--gpt_model	gpt-5-nano	OpenAI's GPT model name, gpt-5 / gpt-5-mini / gpt-5-nano
--gemini_model	gemini-2.5-flash-lite	Google's Gemini model name, gemini-2.0-flash / gemini-2.5-flash / gemini-2.5-flash-lite
--translation_prompt		If set, will translate the result text to target language via GPT / Gemini API (According to which API key is filled in). Example: "Translate from Japanese to Chinese"
--translation_history_size	0	The number of previous messages sent when calling the GPT / Gemini API. If the history size is 0, the translation will be run parallelly. If the history size > 0, the translation will be run serially.
--translation_timeout	10	If the GPT / Gemini translation exceeds this number of seconds, the translation will be discarded.
--use_json_result		Using JSON result in LLM translation for some locally deployed models.
--retry_if_translation_fails		Retry when translation times out/fails. Used to generate subtitles offline.
--temperature		Specify the temperature parameter for LLM translation.
--top_p		Specify the top_p parameter for LLM translation.
--top_k		Specify the top_k parameter for LLM translation (Affects Gemini translation only).
--prompt_cache_key		If set, will pass prompt_cache_key to the LLM backend for caching optimization (Affects GPT translation only).
--reasoning_effort		Specify the reasoning_effort parameter for LLM translation (Affects GPT translation only).
--verbosity		Specify the verbosity parameter for LLM translation (Affects GPT translation only).
--service_tier		Specify the service_tier parameter for LLM translation (Affects GPT translation only).
--processing_proxy		Use the specified HTTP/HTTPS/SOCKS proxy for Whisper/GPT API (Gemini currently doesn't support specifying a proxy within the program), e.g. http://127.0.0.1:7890.
Output Options
--output_timestamps		Output the timestamp of the text when outputting the text.
--hide_transcribe_result		Hide the result of Whisper transcribe.
--output_file_path		If set, will save the result text to this path.
--cqhttp_url		If set, will send the result text to the cqhttp server.
--cqhttp_token		Token of cqhttp, if it is not set on the server side, it does not need to fill in.
--discord_webhook_url		If set, will send the result text to the discord channel.
--telegram_token		Token of Telegram bot.
--telegram_chat_id		If set, will send the result text to this Telegram chat. Needs to be used with "--telegram_token".
--output_proxy		Use the specified HTTP/HTTPS/SOCKS proxy for Cqhttp/Discord/Telegram, e.g. http://127.0.0.1:7890.

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