128e0f087d
Add FORK_NOTES.md describing the new features, a README pointer, and keep the known-good baseline encoder as contrib/dvd-safe-converter.sh (the reference the Compatibility profile is modelled on). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
66 lines
3 KiB
Markdown
66 lines
3 KiB
Markdown
# DeVeDe-NG — Hardsub & Auto-split Fork
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This is a fork of [DeVeDe-NG](https://gitlab.com/rastersoft/devedeng) that adds
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three things aimed at producing burn-ready NTSC DVDs from arbitrary video files:
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1. **Embedded subtitle detection + hardsubbing (burn-in).**
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2. **Selectable DVD encode profiles** (Compatibility / High quality / Custom).
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3. **Automatic splitting of over-long projects across multiple ISOs / DVD-Rs.**
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The baseline encode is modelled on the known-good script in
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[`contrib/dvd-safe-converter.sh`](contrib/dvd-safe-converter.sh).
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## 1. Hardsubbing embedded subtitles
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The analyzer (`ffprobe` / `avprobe`) now detects embedded subtitle tracks and
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classifies each as **text** (SubRip/ASS/mov_text/WebVTT) or **image**
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(PGS/VOBSUB/DVD subtitle). In a movie's *Subtitles* properties page a
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**"Burn in embedded subtitle"** dropdown lets you pick one track to render
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permanently into the picture.
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- **Text** subs are burned with ffmpeg's `subtitles=` (libass) filter, applied
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after scaling to the DVD size.
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- **Image** subs are composited with an `overlay` filtergraph *before* scaling,
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so bitmap positioning stays aligned with the source frame. (OCR-to-text is an
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optional future enhancement; the default overlays the bitmap directly.)
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Burned-in subtitles are part of the video; the existing *soft* subtitle support
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(spumux subpicture streams from external files) is unchanged.
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## 2. Encode profiles
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A project-level **Encode profile** selector (next to the disc-size control,
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DVD only):
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| Profile | Video | Audio | Notes |
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| --- | --- | --- | --- |
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| **Compatibility (4500k)** | CBR 4500k | AC3 192k | Old-player safe baseline (~133 min / single-layer disc). |
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| **High quality (fill disc)** | VBR, fills disc | AC3 448k | Best quality per disc. |
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| **Custom** | user kbps | user kbps | Advanced; clamped to stay within DVD spec. |
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NTSC DVD audio is AC3 for all profiles (the upstream default was MP2 for NTSC),
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matching the baseline script and maximising player compatibility.
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## 3. Splitting long projects across discs
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Usable disc capacity is taken from the selected disc size (with the existing
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~10% safety margin). When a project does not fit on one disc at the chosen
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quality, you are asked whether to:
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- **Split into N discs** — keep the quality and author one DVD/ISO per disc
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(`name-disc1.iso`, `name-disc2.iso`, …), **or**
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- **Reduce bitrate** — squeeze everything onto a single disc (the original
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behaviour).
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Multiple titles are distributed across discs whole. A single movie that is
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itself larger than one disc is split by time at the **chapter boundary nearest**
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each disc's capacity (falling back to an even time cut when the movie has no
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chapters). Split discs are authored without a menu — each disc plays its
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segment(s) directly.
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### Limitations
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- Split discs have no DVD menu.
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- Burning is per-disc: the app produces the ISOs; burn each in turn.
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- Image-subtitle burn-in is supported by the ffmpeg backend; the avconv backend
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handles text subtitles only.
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