Member Avatar for Sowena

Hi,
I recently filmed a school nativity, I edited in final cut, exported to QT, created the DVD menu in iDVD and burned most disks from there. I copied a selection of the disks in the schools disk copier to save time. Some of the DVD's when played contain a section of a film , the clip appear about 2/3 of the way through the nativity and runs for approx 15 minutes, I do not recognise the film. Does anyone have any idea where the film may of come from and how it got onto the DVD?

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Dani AI

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A quick diagnostic checklist and practical checks that map to the answers already posted by and the follow-up from . If a stray 15-minute clip shows up on some discs, the cause is usually one of two things: something in the authoring/project side (an unintended clip left in the timeline or an incorrect asset linked into the DVD build) or something in the duplication step (a duplicator loading the wrong image, leftover data from a previous job, or a bad copy session). Do not burn more discs until the source is verified.

Steps to diagnose (work through these in order):

  • Verify the exported movie and the authoring project on the authoring machine first. If the clip is inside the exported file or the project timeline, fix the project and re-export.
  • If the exported master is clean, inspect an affected disc on a computer. Copy its VIDEO_TS folder and compare file sizes and counts to a clean master. If the VOB/IFO files differ, the duplicator changed the image.
  • Make one fresh burn directly from the authoring machine and compare that disc to a duplicated disc. If the fresh burn is clean and the copies contain the extraneous clip, the duplicator is the likely culprit.
  • If possible, test affected discs in multiple players to rule out a player-side playback issue.

Quick integrity check (macOS / Unix example):

md5 master.iso
md5 duplicated.iso

Matching checksums mean identical images; mismatches show copying altered the image.

Practical notes: cheaply made duplicators can retain or load incorrect images; power-cycle and clear the duplicator memory, re-load the master, or ask the school tech to update firmware. Always finalize/close discs during burning and keep a verified master ISO so you can re-burn reliably. If the problem persists after these checks, report exact error messages and whether the bad clip is present in the exported master—those specifics will pinpoint whether the issue is in the authoring or duplication stage.

Member Avatar for erikduop

There could be many reasons for continually getting cryptic error messages while you try to burn DVDs. Here are four of the most common culprits...

Member Avatar for sophieharris

what type of error are you having

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