Fix blank screen on empty analysis and >60m timestamp bug #53
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- Added "No highlights found" empty state to `app/analyze/[videoId]/page.tsx` to prevent blank screens when AI generates zero topics. - Updated `lib/ai-processing.ts` to use shared `formatTimestamp` utility, fixing a bug where local `formatTime` incorrectly formatted >60m timestamps as MM:SS (e.g. 70:00), causing validation failures. - Relaxed `parseTimestamp` validation in `lib/timestamp-utils.ts` to support MM:SS formats where minutes >= 60 as a fallback.
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Pull request overview
This PR fixes two critical issues: a blank screen when video analysis produces zero topics, and incorrect timestamp formatting for videos longer than 60 minutes.
Changes:
- Added empty state UI to handle zero-topic analysis results gracefully
- Replaced buggy local
formatTimeimplementation with robustformatTimestamputility - Relaxed timestamp parsing to accept MM:SS where MM >= 60 for legacy data compatibility
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| lib/timestamp-utils.ts | Modified parseTimestamp validation to allow minutes >= 60 in MM:SS format when hours are absent |
| lib/ai-processing.ts | Replaced flawed formatTime with formatTimestamp to fix >60 minute timestamp formatting bug |
| app/analyze/[videoId]/page.tsx | Added empty state UI with retry functionality for zero-topic analysis results |
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| // Relax minute check to allow MM:SS where MM >= 60 (fallback scenarios) | ||
| // unless hours are present, in which case strict 0-59 applies |
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The comment says 'Relax minute check to allow MM:SS where MM >= 60' but this logic only validates that when hours > 0, minutes must be < 60. The relaxation for MM:SS format when hours are absent is implicit (no check exists), which could be confusing. Consider adding an explicit comment or restructuring to make the two cases clearer. For example: // When hours are present, minutes must be 0-59 strictly before line 33, and a comment before line 30 clarifying that without hours, minutes can be >= 60 for MM:SS format timestamps.
| // Relax minute check to allow MM:SS where MM >= 60 (fallback scenarios) | |
| // unless hours are present, in which case strict 0-59 applies | |
| // When no hours are present (MM:SS), minutes are allowed to be >= 60 (fallback scenarios) | |
| // When hours are present (HH:MM:SS), minutes must be in the strict range 0-59 |
| <button | ||
| type="button" | ||
| onClick={() => { | ||
| // Force regenerate logic |
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The comment 'Force regenerate logic' is misleading. This doesn't force regeneration - it simply calls processVideo which may use cached results if available. The comment should either be removed or clarified to reflect the actual behavior (e.g., 'Retry analysis').
| // Force regenerate logic | |
| // Retry analysis (may use cached results) |
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| <button | ||
| type="button" | ||
| onClick={() => { | ||
| // Force regenerate logic | ||
| processVideo(normalizedUrl, mode); |
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The empty-state “Try again” button just calls processVideo(normalizedUrl, mode) without setting the regen/force-regenerate path, so if the current video analysis is already cached with an empty topics array (which is now what triggers this state), the retry will immediately short‑circuit to the same cached empty result and the user can never re-run analysis. This is most visible for older cached analyses that produced zero topics; the UI now suggests a retry that cannot actually regenerate.
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| disabled={isModeLoading} | ||
| > | ||
| Try again | ||
| </button> |
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Retry button doesn't force regeneration for cached empty results
High Severity
The "Try again" button in the new empty state UI calls processVideo(normalizedUrl, mode) with a comment saying // Force regenerate logic, but it doesn't actually force regeneration. The forceRegenerate flag is derived from URL params at component mount and isn't modified by this button. When a video analysis returns zero topics (the exact scenario this UI handles), the empty result is cached. Clicking "Try again" will load the same cached empty result instead of re-running the analysis, making the retry functionality ineffective.
1 participant
Fixed a critical issue where video analysis resulting in zero topics (often due to timestamp parsing failures for longer videos) would render a blank screen.
Changes:
app/analyze/[videoId]/page.tsxto inform users when no highlights are found and offer a retry action.lib/ai-processing.tsto use the robustformatTimestampfromlib/timestamp-utils.tsinstead of a flawed local implementation that broke for videos > 60 minutes.lib/timestamp-utils.tsparseTimestampto be more permissive with MM:SS formats (allowing minutes >= 60) to handle legacy or external data safely.PR created automatically by Jules for task 10651664497245241971 started by @SamuelZ12
Note
Addresses blank screens on zero-topic analyses and timestamp issues for long videos.
topics.length === 0with guidance and a retry action; preserves existing error-state handling.formatTimestampthroughout prompts, transcript rendering, chunk windows, and fallbacks; removes duplicate formatter.parseTimestampminute validation (allow MM:SS with minutes ≥ 60 when no hours) and centralizes formatting viaformatTimestamp; timestamp range handling updated accordingly.Written by Cursor Bugbot for commit 95dd4e1. This will update automatically on new commits. Configure here.