Align preview typography with FFmpeg output, add video/song title split, and ship OSS updates.
Separate YouTube video titles from on-video song/artist fields with Pro gating, serve curated fonts and watermark assets for 1:1 preview parity, and include billing/API/docs/deploy stack for self-hosted release.
This commit is contained in:
Atakan Doğan Özban
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sidebar_position: 3
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---
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# Video editing
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Self-hosted Songs2VID includes a **Layout Studio** on the dashboard upload form: art-track compositions, blur backgrounds, typography, and watermarks with live preview. The same options are available on the [REST API](./api/endpoints.md).
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## Classic vs art-track
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| Mode | Behavior |
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|------|----------|
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| **Classic** (no template) | Cover letterboxed on a black frame — simple and reliable |
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| **Art-track template** | Cover + title/artist arranged by a fixed template, with a blurred cover fill behind |
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Templates are enum-based. Free-form cover coordinates (`x`, `y`, `coverX`, …) are rejected so encoding stays predictable.
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### Templates
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| Template | Layout |
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|----------|--------|
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| `COVER_LEFT_TEXT_RIGHT` | Cover on the left; title & artist on the right |
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| `COVER_TOP_TEXT_BOTTOM` | Cover on top; title & artist below |
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| `COVER_RIGHT_TEXT_LEFT` | Cover on the right; title & artist on the left |
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| `CENTERED_COMPACT` | Centered cover with a compact title/artist stack |
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Pick a template in the UI under **Composition**, or set `metadata.layout.template` in the API.
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## Title and artist
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Each track can have:
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- **Title** — used on the video and as the YouTube title (often prefilled from the filename)
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- **Artist** — drawn under the title on art-track layouts (max 80 characters)
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Artist is especially useful when ID3 tags or your API payload include it.
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## Blur background
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When an art-track template is active, the encoder builds a full-frame background from the cover:
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- **Blur amount** (`blurAmount`, `0`–`100`, default `55`) — FFmpeg `boxblur` intensity
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- **Background opacity** (`blurOpacity`, `0`–`100`, default `100`) — how strong the blurred fill is versus solid black (`0` = black, `100` = full blur)
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Use lower opacity for a darker, more subdued frame; higher for a soft wash of the artwork.
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## Fine-tuning
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All values are clamped. These nudge the composition inside the template — they are not free-form canvas placement.
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| Control | Field | Range | Default | What it does |
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|---------|-------|-------|---------|--------------|
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| Padding | `textPadding` | 16–120 px | 48 | Space around cover and text |
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| Title ↔ artist | `titleArtistGap` | 0–64 px | 10 | Vertical gap between title and artist |
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| Text horizontal | `textOffsetX` | −120–120 px | 0 | Shift the text block left/right |
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| Text vertical | `textOffsetY` | −120–120 px | 0 | Shift the text block up/down |
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In the dashboard, sliders update the live preview. Via API, nest them under `metadata.layout` (camelCase or snake_case aliases are accepted).
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## Per-track covers
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Upload a shared cover for the batch, then optionally set a different image per item (`metadata.imagePath` after uploading with `type=image`). Useful for singles that share an album batch but need distinct artwork.
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## Watermarks
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Modes:
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| Mode | Effect |
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|------|--------|
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| `none` | No watermark |
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| `default` | Built-in Songs2VID branding |
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| `text` | Custom text with optional typography |
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| `logo` | Custom PNG (upload with `type=logo`, then set `logoPath`) |
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### Position and offset
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- **Position**: `top-left` · `top-right` · `bottom-left` · `bottom-right` · `center`
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- **Offsets** (`offsetX` / `offsetY`): `0`–`200` px from the chosen anchor (default `20`)
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### Typography (text mode)
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Curated fonts (bundled under `assets/fonts` after fetch):
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- `system` — FFmpeg default
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- `inter` · `montserrat` · `roboto` · `oswald` · `playfair`
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- `custom` — your `.ttf` / `.otf` (max 10 MB; upload with `type=font`, set `fontKey: "custom"` and `fontPath`)
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Refresh curated files if missing:
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```bash
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node scripts/fetch-watermark-fonts.mjs
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```
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Text length is capped at 80 characters.
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## Dashboard workflow
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1. Add audio (and optional per-track covers)
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2. Open **Layout Studio** on a track
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3. Choose classic or a template, then tune blur, padding, gaps, and text offsets
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4. Configure watermark mode, font, and position
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5. Preview updates live; submit to enqueue encoding
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## API
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See [Endpoints](./api/endpoints.md) for curl examples. Layout and watermark objects live under each item’s `metadata`:
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```json
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{
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"title": "My Track",
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"artist": "My Artist",
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"layout": {
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"template": "COVER_LEFT_TEXT_RIGHT",
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"blurAmount": 60,
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"blurOpacity": 85,
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"textPadding": 48,
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"titleArtistGap": 12,
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"textOffsetX": 0,
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"textOffsetY": 0
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},
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"watermark": {
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"mode": "text",
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"text": "My Label",
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"fontKey": "montserrat",
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"position": "bottom-right",
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"offsetX": 24,
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"offsetY": 24
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}
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}
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```
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