cli-anything-videocaptioner

AI-powered video captioning tool. Transcribe speech → optimize subtitles → translate → burn into video.

Installation

pip install cli-anything-videocaptioner

Prerequisites:

• Python 3.10-3.12 (videocaptioner 1.4.1 requires >=3.10,<3.13)
• videocaptioner must be installed (pip install videocaptioner)
• FFmpeg required for video synthesis

Usage

Basic Commands

# Show help
cli-anything-videocaptioner --help

# Start interactive REPL mode
cli-anything-videocaptioner

# Transcribe a video (free, no setup)
cli-anything-videocaptioner transcribe video.mp4 --asr bijian

# Translate subtitles (free Bing translator)
cli-anything-videocaptioner subtitle input.srt --translator bing --target-language en

# Full pipeline: transcribe → translate → burn subtitles
cli-anything-videocaptioner process video.mp4 --asr bijian --translator bing --target-language en --subtitle-mode hard

# Review subtitle/script consistency before a final hard-burn
cli-anything-videocaptioner synthesize video.mp4 -s subtitles.srt \
  --subtitle-mode hard \
  --review-script approved_script.txt

# Render a one-frame subtitle preview for review
cli-anything-videocaptioner review subtitles.srt \
  --script approved_script.txt \
  --preview-video video.mp4 \
  --preview-output review_5s.png

# JSON output (for agent consumption)
cli-anything-videocaptioner --json transcribe video.mp4 --asr bijian

REPL Mode

When invoked without a subcommand, the CLI enters an interactive REPL session:

cli-anything-videocaptioner
# Enter commands interactively with tab-completion and history

Command Groups

transcribe — Speech to subtitles

transcribe <input> [--asr bijian|jianying|whisper-api|whisper-cpp] [--language CODE] [--format srt|ass|txt|json] [-o PATH]

• bijian (default): Free, Chinese & English, no setup
• whisper-api: All languages, requires --whisper-api-key

subtitle — Optimize and translate

subtitle <input.srt> [--translator llm|bing|google] [--target-language CODE] [--layout target-above|source-above|target-only|source-only] [--no-optimize] [--no-translate] [-o PATH]

• Three steps: Split → Optimize → Translate
• Bing/Google translators are free
• 38 target languages supported (BCP 47 codes)

synthesize — Burn subtitles into video

synthesize <video> -s <subtitle> [--subtitle-mode soft|hard] [--quality ultra|high|medium|low] [-o PATH] [--review-script PATH] [--max-script-diff-ratio FLOAT]

• Mirrors the stable backend synthesize surface
• Subtitle look is controlled by the subtitle asset/backend version, not extra harness flags
• --review-script checks subtitle/script drift before the final export
• Lower --max-script-diff-ratio when copy accuracy matters more than resilience

process — Full pipeline

process <input> [--asr ...] [--translator ...] [--target-language ...] [--subtitle-mode ...] [--layout ...] [--no-optimize] [--no-translate] [--no-synthesize] [-o PATH]

review — Consistency check and preview

review <input.srt|input.ass> [--script PATH] [--max-diff-ratio FLOAT] [--preview-video PATH] [--preview-at TC] [--preview-output PATH]

• Detects subtitle/script drift before a hard-burn
• Can render a single review frame instead of producing a full final video

styles — List style presets

styles

• Reports whether the installed backend exposes preset styling support

config — Manage settings

config show
config set <key> <value>

download — Download online video

download <URL> [-o DIR]

JSON Output

All commands support --json for machine-readable output:

cli-anything-videocaptioner --json transcribe video.mp4 --asr bijian
# {"output_path": "/path/to/output.srt"}

Backend Notes

• The upstream backend currently requires Python >=3.10,<3.13; prefer Python 3.12 for matrix runs.
• Advanced synthesize-time style flags are backend-version dependent. Use styles to check whether the installed backend exposes them.
• Compatibility flags such as layout, rendermode, style, styleoverride, and font_file should be treated as non-stable unless styles and the installed backend confirm they are supported.

Target Languages

BCP 47 codes: zh-Hans zh-Hant en ja ko fr de es ru pt it ar th vi id and 23 more.