Best Workflow: Exporting Lightroom Catalogs to PiwigoExporting Lightroom catalogs to Piwigo creates a bridge between powerful desktop photo management and a lightweight, self-hosted web gallery. This workflow preserves metadata, organization, and image quality while making galleries available to clients, friends, or the public. Below is a comprehensive, step-by-step guide covering preparation, plugin options, export techniques, metadata handling, synchronization strategies, automation, performance considerations, and troubleshooting.
Why export Lightroom catalogs to Piwigo?
Exporting to Piwigo gives you:
- Centralized web access to your Lightroom-managed images.
- Control over hosting and privacy with a self-hosted or Piwigo-hosted instance.
- Preserved metadata and organizational structure, if done properly.
- Customizable galleries and public-facing presentation without losing Lightroom’s editing power.
Overview of the workflow
- Prepare your Lightroom catalog and images.
- Choose an export method (manual export, FTP, or plugin).
- Map Lightroom metadata and collections to Piwigo albums and tags.
- Upload images and metadata to Piwigo.
- Verify image quality, metadata, and gallery structure.
- Set up synchronization for future changes.
Preparing your Lightroom catalog
- Clean up your catalog:
- Remove duplicates and rejected images.
- Consolidate related photos into collections or collection sets.
- Standardize filenames (optional but helpful for sync):
- Use Lightroom’s Filename Template Editor to add date, sequence, or unique IDs.
- Decide on export formats and sizes:
- For client galleries, export high-quality JPEGs (quality 80–95) sized appropriately for web (e.g., 1600–2400 px on the long edge).
- For archival/full-resolution needs, export original files or TIFFs/HEIC as required.
- Check metadata completeness:
- Ensure titles, captions, keywords, and copyright are filled where needed.
- Use the Metadata panel and Lightroom’s Keywording tools to batch-apply keywords.
Mapping Lightroom organization to Piwigo
- Lightroom Collections → Piwigo Albums
- Collection Sets → Parent Albums
- Keywords → Tags in Piwigo
- Titles/Captions → Image titles and descriptions
- Ratings/Flags → Can be mapped to Piwigo categories or custom tags (requires manual or scripted mapping)
Plan your album hierarchy in Piwigo before exporting to keep navigation intuitive.
Export methods
Below are the most common methods to get images from Lightroom into Piwigo:
-
Manual export + web uploader
- Export images to a local folder organized by album names.
- Use Piwigo’s web uploader (or batch upload) to import folders as albums.
- Pros: Simple, no plugins required. Cons: Manual, time-consuming for frequent updates.
-
FTP/SFTP upload
- Export images to a local folder and upload via FTP to Piwigo’s gallery directory (typically local or via FTP to server).
- Use Piwigo’s “synchronization” features or the Admin “Batch add” to register files into the database.
- Pros: Faster for large uploads. Cons: Requires server access and care with permissions.
-
Lightroom plugins (recommended for ongoing workflows)
- Use a plugin to export directly from Lightroom to Piwigo, preserving metadata and often handling album creation.
- Popular plugin: “Piwigo Export” or third-party export tools that support Piwigo (check plugin compatibility with your Lightroom version).
- Pros: Streamlined, can preserve metadata and album mapping. Cons: Plugin maintenance and compatibility considerations.
Using a Lightroom-to-Piwigo plugin (detailed)
- Install the plugin:
- Download the plugin file (usually a .lrplugin or ZIP) and install via Lightroom’s File → Plug-in Manager.
- Configure plugin settings:
- Enter your Piwigo site URL, username, and application password or API key if supported.
- Choose export size/quality, filename template, and metadata inclusion (IPTC/XMP).
- Map collections to Piwigo albums:
- Many plugins allow you to select or create an album on export.
- Export:
- Select photos or a collection in Lightroom.
- Run File → Export with the plugin selected as the export target.
- Monitor the upload progress; resolve any authentication or connectivity errors.
Tips:
- Use an application-specific password if your Piwigo is behind stronger authentication.
- Test with a small batch to confirm metadata mapping and album behavior before full export.
Metadata transfer and synchronization
- Metadata formats:
- Ensure the plugin or export method writes metadata either directly to image files (IPTC/XMP) or sends it via API to Piwigo.
- Keywords and tags:
- Export Lightroom keywords to IPTC keyword fields; Piwigo often reads these as tags on upload.
- Captions and titles:
- Write captions to the IPTC Caption/Description field and titles to the IPTC Title field.
- Geolocation:
- If photos contain GPS coordinates, confirm that Piwigo reads and displays them (Piwigo supports geotag display via plugins).
- Ratings:
- Lightroom ratings do not have a universal standard in Piwigo; export as custom tags like “rating_5” if you want to preserve them.
For ongoing sync, prefer a plugin or scripted solution that can detect added/removed images and metadata changes.
Automation strategies
- Scheduled exports:
- Use Lightroom’s export presets combined with third-party schedulers or OS-level automation (macOS Automator, Windows Task Scheduler) to run exports at intervals.
- Two-way sync:
- True two-way sync (web ↔ Lightroom) is rare. Consider exporting edits and using Piwigo as the distribution platform; treat Lightroom as the master catalog.
- Git-like versioning:
- Keep exports in dated folders (YYYY-MM-DD) to track changes over time without overwriting.
Performance and hosting considerations
- Image sizes and bandwidth:
- Choose web-optimized sizes to reduce load time. Provide links to full-res downloads if needed.
- Storage:
- Monitor server storage; consider offloading originals to cloud storage or using Piwigo plugins that integrate with S3-compatible storage.
- Thumbnails and caching:
- Piwigo generates thumbnails on upload. Make sure PHP memory limits and execution times are sufficient for large batches.
- Backups:
- Back up both your Lightroom catalog and your Piwigo database/files regularly.
Troubleshooting common issues
- Authentication errors:
- Recheck credentials, site URL, and API key; try generating an application-specific password.
- Missing metadata:
- Confirm the plugin writes IPTC/XMP; verify Piwigo’s settings to read metadata on upload.
- Duplicate uploads:
- Use consistent filename templates or enable deduplication features in Piwigo.
- Slow uploads:
- Use FTP for large batches or break uploads into smaller groups; check server upload limits and timeouts.
- Permissions errors:
- Ensure uploaded files/directories have correct ownership and permissions for the web server to read/write.
Example step-by-step (practical)
- Prepare: In Lightroom, create a Collection Set “Client Work” → Collection “Smith Wedding”.
- Metadata: Batch-apply keywords: “Smith, wedding, 2025”. Fill title and caption for cover photo.
- Export preset: Create Lightroom export preset: JPEG quality 90, long edge 2000 px, filename template “Smith_{Sequence}”.
- Plugin config: Install Piwigo export plugin, enter site URL and credentials, map collection to album “Smith Wedding”.
- Export: Select collection → Export with plugin → Verify in Piwigo that album, images, titles, and tags are correct.
- Sync updates: For new selects, export only new photos using Lightroom’s “Export as Catalog” or the plugin’s incremental upload feature.
Alternatives and complementary tools
- Use other gallery platforms (PhotoPrism, Lychee) if they better match your needs.
- Consider DAM (Digital Asset Management) systems for large-scale professional workflows.
- Use cloud services (SmugMug, Zenfolio) if you prefer hosted solutions with built-in client galleries.
Final checklist before going live
- [ ] Images exported at web-appropriate resolution and quality.
- [ ] Keywords, titles, and captions present and correct.
- [ ] Albums and hierarchy match planned navigation.
- [ ] Server storage, PHP limits, and backups verified.
- [ ] Permissions and thumbnails generated.
- [ ] Test gallery on desktop and mobile.
Exporting Lightroom catalogs to Piwigo is a pragmatic way to combine local editing power with a customizable web gallery. With the right plugin and a consistent workflow you can keep Lightroom as the master while using Piwigo to present, share, and archive your work.