EpubCCEPUBCheck MED-009: zero-length overlay clip
Updated:
EPUBCheck MED-009 is an error message: “The time specified in the clipBegin attribute must not be the same as clipEnd.” In a media overlay, a clip's clipBegin and clipEnd are the same, so the clip has no duration. Nothing would play for that phrase, and EPUBCheck reports it as an error.
The official message
The time specified in the clipBegin attribute must not be the same as clipEnd.
- Default severity
- Error. The EPUB breaks a rule of the specification and is invalid. Stores and Send to Kindle may reject it, and EPUBCheck exits with status 1.
- EPUBCheck version
- 5.4.0
Typical causes
- A clip that was cut to zero length when editing the narration.
- An alignment tool that could not place a phrase and wrote the same time twice.
How to fix it
- Open the SMIL file EPUBCheck names and find the audio element at the line it reports.
- Correct the times from the audio file, or remove the par element if the phrase has no narration.
- Rebuild the EPUB and run EPUBCheck again to confirm the message is gone.
When it's not this
If clipBegin is later than clipEnd, the error is MED-008.
Terms used here
Other MED messages
MED-008The time specified in the clipBegin attribute must not be after clipEnd.MED_010EPUB Content Documents referenced from a Media Overlay must specify the "media-overlay" attribute.MED_007Picture "source" elements must define a "type" attribute when they reference foreign resources; found resource "…" of type "…".MED_011EPUB Content Document referenced from multiple Media Overlay Documents.MED_012The "media-overlay" attribute does not match the ID of the Media Overlay that refers to this document.MED-005Media Overlay audio reference … to non-standard audio type … found.
Sources
Message text and severity from EPUBCheck 5.4.0 (W3C, BSD-3-Clause). Explanation by EpubCC.