# DeVeDe-NG — Hardsub & Auto-split Fork

This is a fork of [DeVeDe-NG](https://gitlab.com/rastersoft/devedeng) that adds
three things aimed at producing burn-ready NTSC DVDs from arbitrary video files:

1. **Embedded subtitle detection + hardsubbing (burn-in).**
2. **Selectable DVD encode profiles** (Compatibility / High quality / Custom).
3. **Automatic splitting of over-long projects across multiple ISOs / DVD-Rs.**

The baseline encode is modelled on the known-good script in
[`contrib/dvd-safe-converter.sh`](contrib/dvd-safe-converter.sh).

## 1. Hardsubbing embedded subtitles

The analyzer (`ffprobe` / `avprobe`) now detects embedded subtitle tracks and
classifies each as **text** (SubRip/ASS/mov_text/WebVTT) or **image**
(PGS/VOBSUB/DVD subtitle). In a movie's *Subtitles* properties page a
**"Burn in embedded subtitle"** dropdown lets you pick one track to render
permanently into the picture.

- **Text** subs are burned with ffmpeg's `subtitles=` (libass) filter, applied
  after scaling to the DVD size.
- **Image** subs are composited with an `overlay` filtergraph *before* scaling,
  so bitmap positioning stays aligned with the source frame. (OCR-to-text is an
  optional future enhancement; the default overlays the bitmap directly.)

Burned-in subtitles are part of the video; the existing *soft* subtitle support
(spumux subpicture streams from external files) is unchanged.

## 2. Encode profiles

A project-level **Encode profile** selector (next to the disc-size control,
DVD only):

| Profile | Video | Audio | Notes |
| --- | --- | --- | --- |
| **Compatibility (4500k)** | CBR 4500k | AC3 192k | Old-player safe baseline (~133 min / single-layer disc). |
| **High quality (fill disc)** | VBR, fills disc | AC3 448k | Best quality per disc. |
| **Custom** | user kbps | user kbps | Advanced; clamped to stay within DVD spec. |

NTSC DVD audio is AC3 for all profiles (the upstream default was MP2 for NTSC),
matching the baseline script and maximising player compatibility.

## 3. Splitting long projects across discs

Usable disc capacity is taken from the selected disc size (with the existing
~10% safety margin). When a project does not fit on one disc at the chosen
quality, you are asked whether to:

- **Split into N discs** — keep the quality and author one DVD/ISO per disc
  (`name-disc1.iso`, `name-disc2.iso`, …), **or**
- **Reduce bitrate** — squeeze everything onto a single disc (the original
  behaviour).

Multiple titles are distributed across discs whole. A single movie that is
itself larger than one disc is split by time at the **chapter boundary nearest**
each disc's capacity (falling back to an even time cut when the movie has no
chapters). Split discs are authored without a menu — each disc plays its
segment(s) directly.

### Limitations

- Split discs have no DVD menu.
- Burning is per-disc: the app produces the ISOs; burn each in turn.
- Image-subtitle burn-in is supported by the ffmpeg backend; the avconv backend
  handles text subtitles only.