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G13: TikTok, Instagram Reels and YouTube Shorts export presets (#3721)

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* G13: TikTok, Instagram Reels and YouTube Shorts export presets

Three Web & Social presets for short-form vertical video: H.264
1080×1920 (9:16), scaled to fill, at the sequence's frame rate, AAC
48 kHz stereo, with Loudness Normalization on at −14 LUFS and a −1 dBTP
ceiling, the level the platforms play at; 10, 8 and 12 Mbps VBR. They
share a short_form() helper; Social Vertical is unchanged.

short_form_presets_are_vertical_and_loudness_normalized checks size,
rate, scaling, bitrate, audio and loudness. Real exports measured
−14.1 LUFS from both a −19 and a −8.4 LUFS source.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* G13: the short-form presets test checks each maximum bitrate

CodeRabbit on #3721: assert max_bitrate_kbps (12, 10 and 16 Mbps) and
the VBR 1 pass mode next to the target bitrate, so a change to the
ceiling alone fails the test.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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2026-11-01 22:15:40 +02:00
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@@ -698,7 +698,8 @@ file.exportMedia {path, preset?, settings?, format?, range?, …} export.qui
overlays, video limiter, loudness normalization), Metadata (`udta` `©nam`, `©ART`, `©cpy`, `©des`,
`©cmt`). `settings.summary()` / `estimate_bytes()` feed Export mode's Summary.
- **Presets.** `export::presets::builtin_presets()` are our own definitions (Match Source adaptive
H.264 at 0.2 / 0.1 / 0.05 bits per pixel, 1080p / 2160p delivery, vertical 1080×1920, ProRes,
H.264 at 0.2 / 0.1 / 0.05 bits per pixel, 1080p / 2160p delivery, vertical 1080×1920 and its
TikTok / Instagram Reels / YouTube Shorts variants with loudness normalized to −14 LUFS, ProRes,
DNxHR, MXF OP1a (DNxHR HQ / ProRes 422 HQ / H.264) and OP-Atom (DNxHR, Avid), image sequences, GIF, WAV / AIFF). User presets and favourites persist in
`<data dir>/export-presets.json` (`export.presets.*`). A `bitrateKbps` in `settings` turns the
adaptive bitrate off, as the flat parameter does, unless `adaptiveBitrate` comes with it.