--- title: Content Analysis error: Video is not changing for more than 30 seconds slug: troubleshooting/content-analysis-error-video-is-not-changing-for-more-than-30-seconds createdAt: 2025-04-30T22:46:05.249Z --- ### ERROR "Content Analysis error: Video is not changing for more than 30 seconds" ### ISSUE This Content Analysis (CQA) error is raised when a source's video stops changing for longer than the configured freeze threshold. The full message identifies the affected PID, e.g. "*Video is not changing for more than 30 seconds on PID \*". 30 seconds is the default, not a fixed value. The threshold is the source's Frozen Video Minimal Duration setting (`freeze_detection_timeout_sec`) and can be changed per source in ZEN Master, if that source has a different value, the message and detection time reflect it. It is most commonly seen when a **slate/static image** is used as a source, or when the video genuinely **freezes**. When the picture is frozen you will typically also see the companion Content Analysis errors for the source (e.g. "*Frozen Frames detected in Source*" and, if audio has also stopped, "*Silent Audio detected in Source*"). ### RESOLUTION - Confirm whether the source is intentionally a slate/static feed (expected) or genuinely frozen upstream. - If it's a false alarm for a deliberately static feed, raise the source's **Frozen Video Minimal Duration** or exclude the PID from CQA (Source > Advanced > ignored CQA PIDs). - If the video is genuinely frozen, investigate the upstream encoder/source path.