e8bc3fd9a2
- batch_transcribe.py: recursive multi-creator transcription runner that walks nested subdirectories, attributes creator from top-level folder name, writes batch_manifest.json with timing and per-creator results - README.md: updated with batch mode docs, HAL0022 environment details, transcript output location (C:\Users\jlightner\chrysopedia\transcripts), scheduled task usage, and transfer instructions for ub01 ingestion
219 lines
7 KiB
Markdown
219 lines
7 KiB
Markdown
# Chrysopedia — Whisper Transcription
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Desktop transcription tool for extracting timestamped text from video files
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using OpenAI's Whisper model (large-v3). Designed to run on a machine with
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an NVIDIA GPU (e.g., RTX 4090).
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## Prerequisites
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- **Python 3.10+**
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- **ffmpeg** installed and on PATH
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- **NVIDIA GPU** with CUDA support (recommended; CPU fallback available)
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### Install ffmpeg
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```bash
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# Debian/Ubuntu
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sudo apt install ffmpeg
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# macOS
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brew install ffmpeg
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# Windows (via chocolatey or manual install)
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choco install ffmpeg
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```
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### Install Python dependencies
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```bash
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pip install -r requirements.txt
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# For CUDA support, install torch with CUDA wheels:
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pip install torch --index-url https://download.pytorch.org/whl/cu126
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```
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## Usage
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### Single file
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```bash
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python transcribe.py --input "path/to/video.mp4" --output-dir ./transcripts
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```
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### Batch mode (all videos in a directory)
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```bash
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python transcribe.py --input ./videos/ --output-dir ./transcripts
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```
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### Mass batch mode (recursive, multi-creator)
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For large content libraries with nested subdirectories per creator:
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```bash
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python batch_transcribe.py \
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--content-root "A:\Education\Artist Streams & Content" \
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--output-dir "C:\Users\jlightner\chrysopedia\transcripts" \
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--python C:\Users\jlightner\.conda\envs\transcribe\python.exe
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# Dry run to preview without transcribing:
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python batch_transcribe.py --content-root ... --output-dir ... --dry-run
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```
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`batch_transcribe.py` recursively walks all subdirectories, discovers video
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files, and calls `transcribe.py` for each directory. The `creator_folder`
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field in the output JSON is set to the top-level subdirectory name (the
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artist/creator). Output directory structure mirrors the source hierarchy.
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A `batch_manifest.json` is written to the output root on completion with
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timing, per-creator results, and error details.
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### Options (transcribe.py)
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| Flag | Default | Description |
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| --------------- | ----------- | ----------------------------------------------- |
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| `--input` | (required) | Path to a video file or directory of videos |
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| `--output-dir` | (required) | Directory to write transcript JSON files |
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| `--model` | `large-v3` | Whisper model name (`tiny`, `base`, `small`, `medium`, `large-v3`) |
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| `--device` | `cuda` | Compute device (`cuda` or `cpu`) |
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| `--creator` | (inferred) | Override creator folder name in output JSON |
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| `-v, --verbose` | off | Enable debug logging |
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### Options (batch_transcribe.py)
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| Flag | Default | Description |
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| ----------------- | ------------ | ------------------------------------------------ |
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| `--content-root` | (required) | Root directory with creator subdirectories |
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| `--output-dir` | (required) | Root output directory for transcript JSONs |
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| `--script` | (auto) | Path to transcribe.py (default: same directory) |
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| `--python` | (auto) | Python interpreter to use |
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| `--model` | `large-v3` | Whisper model name |
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| `--device` | `cuda` | Compute device |
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| `--dry-run` | off | Preview work plan without transcribing |
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## Output Format
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Each video produces a JSON file matching the Chrysopedia pipeline spec:
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```json
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{
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"source_file": "Skope — Sound Design Masterclass pt2.mp4",
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"creator_folder": "Skope",
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"duration_seconds": 7243,
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"segments": [
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{
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"start": 0.0,
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"end": 4.52,
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"text": "Hey everyone welcome back to part two...",
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"words": [
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{ "word": "Hey", "start": 0.0, "end": 0.28 },
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{ "word": "everyone", "start": 0.32, "end": 0.74 }
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]
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}
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]
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}
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```
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This format is consumed directly by the Chrysopedia pipeline stage 2
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(transcript segmentation) via the `POST /api/v1/ingest` endpoint.
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## Resumability
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Both scripts automatically skip videos whose output JSON already exists. To
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re-transcribe a file, delete its output JSON first.
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## Current Transcription Environment
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### Machine: HAL0022 (10.0.0.131)
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- **GPU:** NVIDIA GeForce RTX 4090 (24GB VRAM)
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- **OS:** Windows 11
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- **Python:** Conda env `transcribe` at `C:\Users\jlightner\.conda\envs\transcribe\python.exe`
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- **CUDA:** PyTorch with cu126 wheels
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### Content Source
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```
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A:\Education\Artist Streams & Content\
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├── au5/ (334 videos)
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├── Keota/ (193 videos)
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├── DJ Shortee/ (83 videos)
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├── KOAN Sound/ (68 videos)
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├── Teddy Killerz/ (62 videos)
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├── ... (42 creators, 1197 videos total across 146 directories)
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```
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### Transcript Output Location
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```
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C:\Users\jlightner\chrysopedia\transcripts\
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```
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Directory structure mirrors the source hierarchy. Each video produces a
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`<filename>.json` transcript file.
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**Transfer to ub01:** Transcripts need to be copied to
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`/vmPool/r/services/chrysopedia_data/transcripts/` on ub01 for pipeline
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ingestion. This can be done via SMB (`\\ub01\vmPool\services\chrysopedia_data\transcripts`)
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or via `scp`/`rsync` from a Linux machine with access to both.
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### Running the Batch Job
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The batch transcription runs as a Windows Scheduled Task to survive SSH
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disconnections:
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```powershell
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# The task is already created. To re-run:
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schtasks /run /tn "ChrysopediaTranscribe"
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# Check status:
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schtasks /query /tn "ChrysopediaTranscribe" /v /fo list | findstr /i "status result"
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# Monitor log:
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Get-Content 'C:\Users\jlightner\chrysopedia\transcription.log' -Tail 30
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# Or follow live:
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Get-Content 'C:\Users\jlightner\chrysopedia\transcription.log' -Tail 20 -Wait
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```
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### Scripts on HAL0022
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```
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C:\Users\jlightner\chrysopedia\
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├── transcribe.py # Single-file/directory transcription
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├── batch_transcribe.py # Recursive multi-creator batch runner
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├── run_transcription.bat # Batch file invoked by scheduled task
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├── launch_transcription.py # Alternative launcher (subprocess)
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├── transcription.log # Current batch run log output
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└── transcripts/ # Output directory
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├── batch_manifest.json
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├── au5/
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├── Break/
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└── ...
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```
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## Performance
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Whisper large-v3 on an RTX 4090 processes audio at roughly 10–20× real-time.
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A 2-hour video takes ~6–12 minutes. For the full 1,197-video library, expect
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roughly 20–60 hours of GPU time depending on average video length.
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## Directory Convention
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The script infers the `creator_folder` field from the parent directory of each
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video file (or the top-level creator folder in batch mode). Organize videos like:
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```
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content-root/
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├── Skope/
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│ ├── Youtube/
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│ │ ├── Sound Design Masterclass pt1.mp4
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│ │ └── Sound Design Masterclass pt2.mp4
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│ └── Patreon/
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│ └── Advanced Wavetables.mp4
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├── Mr Bill/
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│ └── Youtube/
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│ └── Glitch Techniques.mp4
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```
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Override with `--creator` when processing files outside this structure.
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