Incorrect metadata on uploaded image

[richvdh]

Steps to reproduce

1. Send a message, containing a portrait photo
2. Inspect the event content. Observe:

{
  "type": "m.room.message",
  "sender": "@richvdh:sw1v.org",
  "content": {
    "msgtype": "m.image",
    "body": "1000017566.jpg",
    "url": "mxc://sw1v.org/<redacted>",
    "info": {
      "h": 1848,
      "w": 4000,
      "mimetype": "image/jpeg",
      "size": 2370540,
      "thumbnail_info": {
        "h": 666,
        "w": 308,
        "mimetype": "image/jpeg",
        "size": 31384
      },
      "thumbnail_url": "mxc://sw1v.org/<redacted>",
      "xyz.amorgan.blurhash": "KWChkB9sSZ?1M|R~Eas;n,"
    }
  },
  "event_id": "$1773914040221hTyLC:sw1v.org",
  "origin_server_ts": 1773914040682,
  "unsigned": {
    "membership": "join",
    "age": 122
  },
  "room_id": "!<redacted>:sw1v.org"
}

Outcome

The h and w are the wrong way round. This confuses receiving clients.

Your phone model

Samsung S22

Operating system version

Android 16

Application version and app store

EXA nightly 26.01.2 develop (6327641)

Homeserver

synapse

Will you send logs?

Yes

Are you willing to provide a PR?

No

[bmarty]

Thanks. I believe that this problem is handled by #6362 which will be merged very soon.

Related: #4049

[richvdh]

If I download the image and thumbnail, they both look ok.

Interesting:

rav@xps9320:~/Downloads$ file img.jpg
img.jpg: JPEG image data, Exif standard: [TIFF image data, little-endian, direntries=12, yresolution=158, xresolution=166, width=4000, model=SM-S901B, height=1848, manufacturer=samsung, software=S901BXXSMGZB2, orientation=upper-right, resolutionunit=2, datetime=2026:03:18 21:54:13], baseline, precision 8, 4000x1848, components 3

so I assume we're being confused about the orientation of the jpeg.