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/watch.ts

@@ -5,6 +5,7 @@ import type { PendingJob } from '~/server/utils/pending'
 import { isLastChainShot, libraryFromPending, pendingFromJob, remainingAfterCurrentShot, writePendingJob, deletePendingJob } from '~/server/utils/pending'
 import { syncQueueFromJob } from '~/server/utils/shotQueue'
 import { isEncodingNode, NODE_LABELS } from '~/server/utils/workflow'
+import { extractFirstFrameFromBuffer } from '~/server/utils/ffmpeg'
 import { mergePermanenceRefs, type PermanenceRef } from '~/utils/globalLocks'
 
 function clipRefsFromJob(library: NonNullable<Job['library']>): PermanenceRef[] | undefined {
@@ -186,10 +187,18 @@ export function watchComfyJob(job: Job, options: { persist?: boolean } = {}): Pr
           })
           if (job.library) {
             let buffer = await downloadComfyVideo(video)
+            let segmentFirstFrame: Buffer | undefined
             if (stitching) {
               if (!existsSync(job.library.extendPart1Path!)) {
                 throw new Error('Extension source clip was missing during stitch')
               }
+              if (job.library.extendTmpDir) {
+                try {
+                  segmentFirstFrame = await extractFirstFrameFromBuffer(buffer, job.library.extendTmpDir)
+                } catch {
+                  // ensureClipFirstFrame will seek to the join if this frame is missing
+                }
+              }
               buffer = await stitchExtension({
                 part1Path: job.library.extendPart1Path!,
                 part2: buffer,
@@ -225,7 +234,8 @@ export function watchComfyJob(job: Job, options: { persist?: boolean } = {}): Pr
               stillId: job.library.stillId,
               sound: job.library.sound,
               globalLocks: job.library.globalLocks,
-              permanenceRefs: clipRefsFromJob(job.library)
+              permanenceRefs: clipRefsFromJob(job.library),
+              segmentFirstFrame
             })
             job.clipId = clip.id
             job.savedPromptId = job.promptId