Albums only have the size properties of their parent?

[colbert2677]

Albums that contain more than one image seem to only pick up the size properties from the first image in the album, so it makes me unable to run width == X and height == Y as a filter in the command line. Even when applying -K to the second image of an album via direct link, it reports back the size and width of the first image in the album it comes from instead of the size of the image I have open instead. Is there any way to apply filters by the image instead of by the album?

For what it's worth, this behaviour can also be observed when using --write-metadata - each individually downloaded image from an album will have its own .json file written but the only difference is in the file name, all the other properties, including the size, remain anchored to whatever they were for the first image of the album, which makes me unable to effectively use --filter well especially when running gallery-dl for an entire profile rather than just individual albums.

[mikf]

What site are you referring to?

[colbert2677]

I'm currently getting this with Pixiv, I've yet to check other sites so far.

[mikf]

Pixiv's mobile API only returns data for the first file of an "album", so there not much that can be done here as long as gallery-dl uses this API.

The AJAX API at least returns width and height for each image, but would require an extra API request per "album".

Example mobile API data for a work with multiple files:

    "page_count": 3,
    "width": 6071,
    "height": 8598,
    "sanity_level": 2,
    "x_restrict": 0,
    "series": {
      "id": 198059,
      "title": "会社と私生活-オンとオフ-"
    },
    "meta_single_page": {},
    "meta_pages": [
      {
        "image_urls": {
          "square_medium": "https://i.pximg.net/c/360x360_10_webp/img-master/img/2025/07/15/12/00/10/132718179_p0_square1200.jpg",
          "medium": "https://i.pximg.net/c/540x540_70/img-master/img/2025/07/15/12/00/10/132718179_p0_master1200.jpg",
          "large": "https://i.pximg.net/c/600x1200_90_webp/img-master/img/2025/07/15/12/00/10/132718179_p0_master1200.jpg",
          "original": "https://i.pximg.net/img-original/img/2025/07/15/12/00/10/132718179_p0.jpg"
        }
      },
      {
        "image_urls": {
          "square_medium": "https://i.pximg.net/c/360x360_10_webp/img-master/img/2025/07/15/12/00/10/132718179_p1_square1200.jpg",
          "medium": "https://i.pximg.net/c/540x540_70/img-master/img/2025/07/15/12/00/10/132718179_p1_master1200.jpg",
          "large": "https://i.pximg.net/c/600x1200_90_webp/img-master/img/2025/07/15/12/00/10/132718179_p1_master1200.jpg",
          "original": "https://i.pximg.net/img-original/img/2025/07/15/12/00/10/132718179_p1.jpg"
        }
      },
      {
        "image_urls": {
          "square_medium": "https://i.pximg.net/c/360x360_10_webp/img-master/img/2025/07/15/12/00/10/132718179_p2_square1200.jpg",
          "medium": "https://i.pximg.net/c/540x540_70/img-master/img/2025/07/15/12/00/10/132718179_p2_master1200.jpg",
          "large": "https://i.pximg.net/c/600x1200_90_webp/img-master/img/2025/07/15/12/00/10/132718179_p2_master1200.jpg",
          "original": "https://i.pximg.net/img-original/img/2025/07/15/12/00/10/132718179_p2.jpg"
        }
      }
    ],

[colbert2677]

Hm... ideally, it's not the biggest concern since I usually filter batch downloads by hand, though I thought I might be able to use filter or a postprocessor to tackle secondary images in an album that match a specific resolution since those tend to be the ones that get deleted during my hand filtering. I think it'd be fine to shelve this. Appreciate the help as always.

I'll check back if I happen to get this with another site but so far I haven't needed to filter them so I haven't checked yet but I would imagine most other sites I check have this ready to go.