matrix.org/static/jira/browse/SYN-429

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summary: Thumbnailing doesn't seem to change size
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created: 2015-06-25 20:48:07.0
creator: leonerd
description: |-
I uploaded a PNG file (279 x 129 pixels; it is in fact the matrix.org logo file). I then ask for a 32x32 thumbnail. The image I get back remains the original size:
{noformat}
$ wget 'https://localhost:8001/_matrix/media/v1/thumbnail/localhost:8001/lUrovTvOMbcPgynUmfLrfvvP?height=32&method=scale&width=32' --no-check-certificate
$ file lUrovTvOMbcPgynUmfLrfvvP\?height\=32\&method\=scale\&width\=32
lUrovTvOMbcPgynUmfLrfvvP?height=32&method=scale&width=32: PNG image data, 279 x 129, 8-bit/color RGBA, non-interlaced
{noformat}
Though interestingly, it isn't just the original file. It has been altered:
{noformat}
$ cksum tests/51content-repo/test.png
3329030393 2239 tests/51content-repo/test.png
$ cksum lUrovTvOMbcPgynUmfLrfvvP\?height\=32\&method\=scale\&width\=32
2639847968 2679 lUrovTvOMbcPgynUmfLrfvvP?height=32&method=scale&width=32
{noformat}
(amusingly the "thumbnail" takes more bytes to express than the original ;) )
id: '11703'
key: SYN-429
number: '429'
priority: '3'
project: '10000'
reporter: leonerd
status: '10100'
type: '1'
updated: 2016-11-07 18:28:11.0
votes: '0'
watches: '2'
workflowId: '11804'
---
actions:
- author: richvdh
body: 'Migrated to github: https://github.com/matrix-org/synapse/issues/1344'
created: 2016-11-07 18:28:11.0
id: '13665'
issue: '11703'
type: comment
updateauthor: richvdh
updated: 2016-11-07 18:28:11.0