Ephemeral processing · files auto-delete after 2 hours
Creator-owned content only
Ephemeral processing · files auto-delete after 2 hours
Creator-owned content only
Use 1080×1920 9:16, H.264/AAC, ≈ −11 LUFS short-form loudness, and 15–90s length caps — then map CapCut masters to Shorts or Reels/TikTok packs before you upload yourself.
Updated
Tools in this guide
RepostClip Shorts Upload Pack and Reels / TikTok Pack loudnorm toward ≈ −11 LUFS with true-peak limiting at −1.5 dBTP (EBU R128 loudnorm). Loudness Normalize (YouTube) targets −14 LUFS for long-form. Mixing those bands without intent is a common cross-post mistake: a −14 master often sounds quiet after a loud Short in the feed.
Shorts and Reels/TikTok packs apply a hard 15–90s trim so the deliverable stays inside short-form windows. Each RepostClip job accepts up to 50 MB upload. Use Compact encode tiers, optional pack target_mb, or Bitrate Optimizer when Discord, DM, or slow-upload ceilings matter. See the file size caps guide for the size spoke of this cluster.
Landscape 16:9 masters that only need reframing use Fit to Aspect: center crop fills 9:16 (edges may clip); black letterbox keeps the full picture with bars. When readiness fails on loudness or length as well, run Shorts Upload Pack (CRF tiers) or Reels / TikTok Pack (ABR tiers) instead of stacking three separate jobs.
Burned captions and end cards sit under Shorts/Reels UI. Safe Zone Margin and Caption Safe Margins pad chosen edges (40–200px) so key text stays readable. Pair with the safe zones spoke guide after the picture and loudness are locked.
1) Export a clean master from CapCut. 2) Run Platform Readiness Report. 3) Map failed Shorts/Reels/TikTok rows to the matching pack; use Fit to Aspect only for canvas. 4) Download before the two-hour purge. 5) Upload in each native app with unique captions. Full handoff narrative: CapCut export vs upload-ready packs; readiness mapping: check readiness then export packs.
FAQ
A practical shared vertical master is 1080×1920 (9:16), MP4 H.264 + AAC, 30 fps (or 60 for high-motion), with short-form loudness near ≈ −11 LUFS. Keep duration inside each app’s short window — RepostClip Shorts and Reels/TikTok packs hard-trim to 15–90s when you need that cap baked in.
Shorts, Reels, and TikTok packs on RepostClip normalize toward ≈ −11 LUFS so opens compete in swipe feeds. Use Loudness Normalize (YouTube) at −14 LUFS for long-form YouTube or a general master you will also post outside short-form. Measure first with Loudness Report when unsure.
Fit to Aspect only changes canvas (center crop or black letterbox to 9:16, 1:1, or 16:9). Use a Shorts or Reels/TikTok pack when you also need −11 LUFS, encode tiers, length trim, and optional MB cap in one pass.
No. Finish cuts and design in CapCut (or any NLE), export one owned master under 50 MB when possible, then run Platform Readiness and the pack that matches failed rows. See CapCut export vs upload-ready packs for the handoff boundary.
Keep reading
Open Platform Readiness Report and run the steps from this guide.
