video-assemble

• SKILL.mdcore · 12,364 bytes
• SKILL.mdcore · 12,364 bytes
• references/audio-modes.mddoc · 3,509 bytes
• references/explicit-audio-mix.mddoc · 3,951 bytes
• references/jianying/LICENSE.duo-videoasset · 1,062 bytes
• references/jianying/SOURCE.mddoc · 703 bytes
• references/jianying/empty_draft_meta_info.jsonasset · 1,768 bytes
• references/jianying/empty_jy_material_video.jsonasset · 1,811 bytes
• references/jianying/empty_jy_meta_material_value.jsonasset · 358 bytes
• references/jianying/empty_jy_project_info.jsonasset · 3,718 bytes
• references/jianying/empty_jy_segment.jsonasset · 1,370 bytes
• references/jianying/empty_jy_text_styles.jsonasset · 440 bytes
• references/jianying/empty_yj_material_audio.jsonasset · 865 bytes
• references/jianying/empty_yj_material_text.jsonasset · 2,447 bytes
• references/narration-adoption.mddoc · 4,767 bytes
• references/packaging.mddoc · 2,801 bytes
• references/source-score.mddoc · 6,869 bytes
• references/subtitle-track.mddoc · 8,659 bytes
• scripts/adoption/__init__.pyruns · 94 bytes
• scripts/adoption/audio_mix_binding.pyruns · 14,208 bytes
• scripts/adoption/av_clock.pyruns · 5,933 bytes
• scripts/adoption/frozen_audio.pyruns · 7,750 bytes
• scripts/adoption/narration_binding.pyruns · 14,877 bytes
• scripts/adoption/strict_inputs.pyruns · 4,200 bytes
• scripts/adoption/strict_publish.pyruns · 6,299 bytes
• scripts/artifacts.pyruns · 1,177 bytes
• scripts/assemble.pyruns · 36,598 bytes
• scripts/assemble_constants.pyruns · 1,991 bytes
• scripts/assembly_contract.pyruns · 12,501 bytes
• scripts/assembly_settings.pyruns · 6,228 bytes
• scripts/audio_automation.pyruns · 6,859 bytes
• scripts/audio_mix.pyruns · 21,812 bytes
• scripts/codec_peak.pyruns · 5,199 bytes
• scripts/export_jianying.pyruns · 5,740 bytes
• scripts/jianying/__init__.pyruns · 49 bytes
• scripts/jianying/builders.pyruns · 11,062 bytes
• scripts/jianying/model.pyruns · 2,796 bytes
• scripts/jianying/optional.pyruns · 1,012 bytes
• scripts/jianying/schema.pyruns · 2,600 bytes
• scripts/jianying/templates.pyruns · 1,064 bytes
• scripts/jianying/timeline_contract.pyruns · 5,914 bytes
• scripts/jianying/tracks.pyruns · 2,068 bytes
• scripts/jianying/writer.pyruns · 7,973 bytes
• scripts/lib.pyruns · 13,254 bytes
• scripts/loudness.pyruns · 15,008 bytes
• scripts/media.pyruns · 13,897 bytes
• scripts/narration_audio.pyruns · 20,387 bytes
• scripts/packaging.pyruns · 5,586 bytes
• scripts/render_preflight.pyruns · 3,481 bytes
• scripts/source_score.pyruns · 24,274 bytes
• scripts/source_subtitles.pyruns · 21,111 bytes
• scripts/subtitles/__init__.pyruns · 56 bytes
• scripts/subtitles/core.pyruns · 15,097 bytes
• scripts/subtitles/render.pyruns · 3,577 bytes
• scripts/subtitles/track.pyruns · 12,677 bytes
• scripts/subtitles/track_binding.pyruns · 10,175 bytes
• scripts/timeline.pyruns · 8,371 bytes
• scripts/timeline_emit.pyruns · 7,774 bytes
• scripts/visual_render.pyruns · 18,372 bytes

## 1. 定位

本技能负责最终合成：

1. 把各段旁白音频放到视频时间线上。
2. 在旁白窗口内用固定包络压低原声（盖住原声对白时与落在安静段时各用一档音量），间隙恢复原声。
3. 根据旁白位置生成 `subtitles.srt`；默认同时生成并烧录 `subtitles.ass`，`--no-burn-subtitles` 可关闭。不烧录时（关闭或降级），`subtitles.srt` 复制到成片旁，名为 `recap_<stem>.srt`；烧录时删掉旧的同名外挂字幕。
4. 可选把最终响度标准化到目标 LUFS：两遍 loudnorm，只用一个恒定增益，不做动态压缩；混音的真峰值放不下这么大的增益时，先过 4 倍过采样的真峰值限幅器（最多削 `LOUDNESS_LIMITER_MAX_DB`，默认 6 dB），超出部分才下调目标响度。真峰值目标针对交付的 AAC 文件：AAC 编码会让真峰值比 PCM 混音高 0.3–1.4 dB，所以首次渲染瞄准 TP 下 0.5 dB，渲染后解码成片实测；仍超过 -1 dBTP 时按超出量再降 0.1 dB 只重编码音频（画面流复制），最多两次，仍超出则以 `delivered_true_peak_over_target` 阻断。ffmpeg 实际用的模式、限幅量与成片实测值记在 `assembly_qc.json` 的 `loudness_mode` 与 `loudnorm_final_pass`（`delivered`）。
5. 成片不带原片的容器元数据（`title`、`comment` 等标签与章节）。

## 2. 声音收尾契约

合成阶段只实现创作决定，不凭空制造决定。Agent 在写旁白位置前，已在 `visual_audio_board.json` 为每个 beat 指定 `audio_owner`：