5.14.1

Fixed

• External PGS subtitle files (raw .sup sidecars, e.g. Jellyfin serving external PGS tracks) now load and render. Two gaps compounded into a silent no-show on every path: FFmpegBuild lacked the sup demuxer (fixed in 2.1.3, now pinned), so avformat_open_input rejected the file with AVERROR_INVALIDDATA; and the sidecar decode loop extracted only text rects, dropping bitmap rects. The loop now routes bitmap rects through the embedded path's imageForSubtitleRect into .image cues with PGS end semantics (an open composition ends at the next composition event's PTS instead of a flat 5 s fallback). Also fixes the frame compositor's bitmap placement: SubtitleImage.position is normalized against its canvas, and the compositor treated it as absolute pixels. Covered by SidecarPGSDecodeTests (real .sup fixture, local-only) and the updated SubtitleFrameCompositorTests.