Use the parent clip last frame and new-segment join for extensions, not the stitched file's first frame. Show this account's library storage in Settings.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/utils/pending.ts

@@ -1,6 +1,7 @@
 import { existsSync, mkdirSync, readdirSync, readFileSync, renameSync, rmSync, writeFileSync } from 'node:fs'
 import { join } from 'node:path'
 import type { Job } from '~/server/utils/jobs'
+import { extractFirstFrameFromBuffer } from '~/server/utils/ffmpeg'
 import { mergePermanenceRefs } from '~/utils/globalLocks'
 
 export interface PendingJob {
@@ -270,11 +271,17 @@ export async function completePendingIfReady(pending: PendingJob) {
   if (inFlight()) return null
   const afterDownload = alreadySaved()
   if (afterDownload) return afterDownload
+  let segmentFirstFrame: Buffer | undefined
   if (pending.extendPart1Path && pending.extendTmpDir) {
     if (!existsSync(pending.extendPart1Path)) {
       removeExtendTemp(pending.extendTmpDir)
       throw createError({ statusCode: 500, statusMessage: 'Extension source clip was missing during stitch' })
     }
+    try {
+      segmentFirstFrame = await extractFirstFrameFromBuffer(buffer, pending.extendTmpDir)
+    } catch {
+      // ensureClipFirstFrame will seek to the join if this frame is missing
+    }
     try {
       buffer = await stitchExtension({
         part1Path: pending.extendPart1Path,
@@ -310,7 +317,8 @@ export async function completePendingIfReady(pending: PendingJob) {
     stillId: pending.stillId,
     sound: pending.sound,
     globalLocks: pending.globalLocks,
-    permanenceRefs: mergePermanenceRefs(pending.permanenceRefs, pending.shotPermanenceRefs?.[pending.chainIndex || 0])
+    permanenceRefs: mergePermanenceRefs(pending.permanenceRefs, pending.shotPermanenceRefs?.[pending.chainIndex || 0]),
+    segmentFirstFrame
   })
   await purgeComfyArtifacts({
     video,