Wenbi

Wenbi converts media and text into structured Markdown, then rewrites or translates it.

It supports:

• Video/audio/URL transcription to VTT/Markdown
• Text rewriting (rewrite, academic style)
• Translation (translate) with DeepL first, then LLM fallback
• PPT-style slide + speech combination (ppt)
• Batch directory processing (wenbi-batch)

Install

Prerequisites:

• Python 3.10+
• ffmpeg in PATH

Install:

pip install wenbi

Or from a local checkout:

# from the project directory
pip install -e .

Quick Start

Rewrite:

wenbi rewrite input.mp4 --lang Chinese --llm ollama/qwen3

Translate (DeepL first):

wenbi translate input.md --lang Chinese --deepl-key "$DEEPL_API_KEY"

PPT workflow:

wenbi ppt lecture.mp4 --lang English

Commands

rewrite (rw)

Rewrite spoken/transcribed text into written style.

wenbi rewrite <input> [options]

Key options:

• --style rewrite|academic
• --lang
• --llm
• --cite-timestamps
• --start-time, --end-time (media/URL)

translate (tr)

Translate content to a target language.

wenbi translate <input> --lang <target> [options]

Key options:

• --deepl-key (or DEEPL_API_KEY env var)
• --llm (fallback model)
• --keep-original-lang
• --cite-timestamps

Translation behavior

translate uses this order:

1. Try DeepL API first (when key is available).
2. If DeepL is unavailable or chunk translation fails, fallback to LLM.

If both DeepL and LLM are unavailable, translation cannot complete successfully.

ppt (p)

Extract slides from video, align with speech, and export combined markdown.

wenbi ppt <video_or_url> [options]

Key options:

• --frame-interval
• --cropped-slide [auto|x0,y0,x1,y1]
• --ppt <ppt/pdf/image/odp>
• --no-ocr
• --no-clean
• --ssim-threshold, --hist-threshold, --dedup-method

Supported Inputs

• Media: .mp4 .avi .mov .mkv .flv .wmv .m4v .webm .mp3 .flac .aac .ogg .m4a .opus
• Text/subtitles: .vtt .srt .ass .ssa .sub .smi .txt .md .markdown .docx
• URL inputs are supported for media flows.

Common Global Options

Used by subcommands:

• --output-dir
• --lang
• --llm
• --chunk-length
• --max-tokens
• --timeout
• --temperature
• --transcribe-model
• --transcribe-lang
• --multi-language
• --verbose

Output Files

Typical outputs:

• *_rewritten.md
• *_translated.md
• *_academic.md
• *_combine.md / *_combine_clean.md (PPT workflows)
• *.vtt, *.csv (depending on flow)

Batch Processing

Process a directory of media files:

wenbi-batch <input_dir> --output-dir <dir> --md

Optional config:

wenbi-batch <input_dir> --config config.yaml

YAML Config (CLI)

wenbi supports YAML via --config.

Example:

input: lecture.mp4
output_dir: ./out
llm: ollama/qwen3
lang: Chinese
chunk_length: 20

Multi-input format is also supported using inputs:.

Python API

from wenbi.main import process_input

text, md_file, csv_file, base_name = process_input(
    file_path="input.mp4",
    subcommand="translate",
    lang="Chinese",
    use_deepl=True,
    deepl_key="<DEEPL_KEY>",
    llm="ollama/qwen3",
)

Troubleshooting

• No DeepL translation output:
  • Set DEEPL_API_KEY or --deepl-key
  • Run with --verbose to confirm DeepL connectivity
• Fallback LLM not working:
  • Ensure your provider is reachable (for example, Ollama running locally for ollama/...)
• PPT OCR issues:
  • Ensure marker_single and OCR dependencies are installed correctly

License

Apache-2.0