During initial sync when photos are ingested separately into Photosmith and Lightroom (for example, when using Proxy JPG Workflow, as discussed in Section 1.8.3), photos in Lightroom and Photosmith must be matching and “linked.” We created several methods by which we try to match photos between the Lightroom and Photosmith, including filename, sequence numbers, capture date and time, file size and camera brand and model.
Once this File Matching occurs during the first sync, the “link” is maintained in both the Photosmith and Lightroom catalogs.Depending on your specific workflow, not all File Matching options are applicable, and not all options should be selected.
Consider the following examples:
- If you convert to DNG during Lightroom ingest, the Filename, unchanged and File size File Matching criteria won’t work. However, Filename, converted to DNG will work.
- If using Proxy JPG Workflow, selecting Filename, unchanged and File size won’t work. However, Filename sequence numbers and Capture date/time should work quite well, so long as filename sequence numbers, as generated by your camera, are preserved.
Note: If Photosmith encounters a condition where File Matching doesn’t work for a specific search criteria, it silently continues by trying the other methods selected, in top-to-bottom order.
Once photos are matched successfully, we preserve this information in the Photosmith catalog. This allows subsequent syncs of the same photos to be much faster.
Below are the File Matching options, and a detailed description of each:
- Filename, unchanged - The original filename as recorded by your camera. If you shoot a photos with a filename of IMG_1234.CR2, the Lightroom plugin will attempt to find any photo matching IMG_1234.CR2.
- Filename, converted to DNG - The Lightroom plugin will search for the photo filename, but with a .dng file extension. If you convert camera raw photos to DNG during Lightroom ingest, select this File Matching option.
- Filename, any raw extension - Intended for folks using Proxy JPG Workflow and don’t rename files during Lightroom ingest. The plugin will look for the same filename, and any camera raw variant. For example, when trying to match IMG_1234.JPG, it will look for IMG_1234.CR2, IMG_1234.NEF, IMG_1234.PEF, etc.
- Capture date/time - File Matching based on the original (EXIF) capture date and time stamp, as recorded by your camera. This is typically very reliable, even if converted to DNG during Lightroom ingest. However, due to limitations in Lightroom, this can only accurate to-the-second. Multiple photos taken within the same second will all be matched, and will require additional File Matching criteria as a fallback.
- Photo file size - When File Matching the original, unconverted photos, Photo file size (for example, 12,735,125 bytes) is extremely accurate. Even photos snapped of the same subject and exact lighting conditions will have slightly varying file size. However, if a photo was converted to DNG, or metadata was applied and embedded upon import into Lightroom, the file size will not be valid File Matching criteria. Except in very specific situations, we urge users to leave this option unselected.
- Camera brand & model - The camera manufacturer and hardware model name, such as Canon 5D Mark III" or “Nikon D300.” This information will not change, even if a conversion to DNG takes place, and is quite reliable as another parameter for use when File Matching. It’s safe to have this option selected.
Accurately selecting the appropriate File Matching options will largely depend on your specific workflow needs. The default options (everything except “any raw extension”) works very well for most users, however, if you regularly encounter issues with File Matching, trying changing these settings.