Troubleshooting Common Issues with the JNG Format Plugin
1. Plugin won’t install or activate
- Check compatibility: Ensure your host application and JNG Format Plugin versions match the plugin’s minimum requirements.
- Verify file integrity: Redownload the plugin archive and compare checksums if provided.
- Permissions: Confirm the plugin directory and files have correct read/write permissions for the application user.
- Conflict with firewall/antivirus: Temporarily disable security software and retry installation.
2. Images fail to open or import
- Confirm file type: Make sure files use the .jng extension and are valid JNG files (not mislabeled PNG/JPEG).
- Update libraries: Ensure dependent image libraries (e.g., libjng, libpng) are installed and up to date.
- Memory limits: Increase application memory or import images in smaller batches if large files fail.
- Check error logs: Look for error messages referencing decode failures or unsupported chunks.
3. Rendering artifacts or corrupted output
- Corrupt source: Test the same JNG file in another viewer to rule out source corruption.
- Color/profile issues: Ensure color profiles embedded in JNG are supported; try disabling color management to test.
- Compression settings: Re-export using different compression or quality settings to see if artifacts persist.
- Update plugin: Install the latest plugin version—rendering bugs are commonly fixed in patches.
4. Slow performance or high CPU usage
- Hardware acceleration: Enable GPU acceleration in the host app if supported.
- Multithreading settings: Adjust thread/worker limits to match CPU cores; some builds default to single-threaded decoding.
- Cache settings: Increase cache size or enable disk-based caching for very large image sets.
- Background processes: Close other CPU-intensive apps and check for antivirus scans interfering with decoding.
5. Metadata or EXIF not preserved
- Export options: Check plugin export settings to enable metadata preservation.
- Library support: Make sure the plugin build includes metadata-handling modules; some builds strip metadata for size.
- Reattach metadata: Use a metadata tool to read from the original file and reapply to the exported image if necessary.
6. Compatibility with other plugins or software
- Plugin conflicts: Disable other image format or processing plugins to isolate conflicts.
- Order of loading: Some hosts load plugins in order—try changing load order if the host allows it.
- API version mismatch: Verify that both plugins target the same host API version; rebuild or update plugins if mismatched.
7. Installation on Linux/macOS/Windows specifics
- Linux: Check library paths (LD_LIBRARY_PATH), use ldd to find missing dependencies, and ensure correct package architecture.
- macOS: Confirm Gatekeeper settings if the plugin isn’t signed; use spctl or allow through Security & Privacy.
- Windows: Run installer as Administrator and check for missing DLLs; Dependency Walker can help identify missing runtime components.
8. Diagnostics and log collection
- Enable verbose logging: Turn on debug/verbose mode in the plugin or host to capture detailed errors.
- Collect environment info: Note OS, host app version, plugin version, and installed image libraries.
- Reproduce steps: Document a minimal reproducible case (file, actions, settings) to speed troubleshooting or bug reports.
- Submit a bug report: Include logs, sample files, and environment details to the plugin’s issue tracker or support channel.
Quick checklist
- Verify compatibility and update plugin/libraries
- Confirm file validity and metadata presence
- Check permissions and dependency paths
- Enable logging and collect diagnostics
- Test for conflicts and adjust performance settings
If you want, I can draft a bug report template or help interpret specific log messages—paste the error text and I’ll analyze it.
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