xiaoxia/xiaoxia-saas

fix: 调换 fps 与 setpts 顺序，修复 P0-3 xfade 多视频转场 PTS 不一致问题 #210

Merged

xiaoxia merged 1 commits from fix/p03-fps-setpts-order into develop

2026-07-10 18:16:01 +08:00

Author	SHA1	Message	Date
用户CI Test	29ed0592a0	fix: 调换 fps 与 setpts 顺序，修复 xfade 多视频转场 PTS 不一致问题 CI/CD Pipeline / Validate Code Quality And Tests (pull_request) Failing after 11s Details CI/CD Pipeline / Frontend Lint (pull_request) Successful in 1m12s Details CI/CD Pipeline / Build & Push Staging (Watchtower auto-deploy) (pull_request) Has been skipped Details CI/CD Pipeline / Build Production Runtime Images (pull_request) Has been skipped Details CI/CD Pipeline / Staging E2E Tests (pull_request) Has been skipped Details CI/CD Pipeline / Staging API Integration Tests (pull_request) Has been skipped Details CI/CD Pipeline / Deploy Production (pull_request) Has been skipped Details CI/CD Pipeline / Production Browser E2E (pull_request) Has been skipped Details P0-3 根因：unified_render_service 中每个 clip 预处理滤镜链里， fps 在 setpts=PTS-STARTPTS 之前执行。当多个视频有不同 timebase/ 帧率时，fps 滤镜基于原始 PTS 进行帧转换，随后的 setpts 仅做时间偏移，导致各片段 PTS 基准不一致，xfade 转场计算 offset 时出错。修复：将 setpts=PTS-STARTPTS 移到 fps 之前，先归一化 PTS 起点，再统一帧率，确保所有片段在进入 xfade 前有一致的时间基准。影响范围： - 多视频 xfade 转场模式（主修复目标） - 单视频一镜到底模式（同步修复，保持逻辑一致）新增测试： - test_setpts_before_fps_in_xfade_inputs: 多视频 xfade 模式验证 - test_setpts_before_fps_single_clip: 单视频模式验证	2026-07-10 17:43:54 +08:00