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Preview image on activity page - how to do it right? #3540

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opened 2023-06-29 18:59:04 +00:00 by mk · 5 comments
mk commented 2023-06-29 18:59:04 +00:00
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With the documentation I added a preview image to https://ada.fsfe.org for the EN and DE version. But when the URL is added in short message platforms, the default logo picture is displayed. Can someone check, what I did wrong?

With the documentation I added a preview image to https://ada.fsfe.org for the EN and DE version. But when the URL is added in short message platforms, the default logo picture is displayed. Can someone check, what I did wrong?
tobiasd commented 2023-06-30 09:22:24 +00:00
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E.g. this OpenSuSE posting about Ada & Zangeman on Mastodon.

Screenshot from Mastodon where the wrong preview image was used

Twitter seems to have problems as well

Screenshot of the corresponding posting from OpenSUSE on Twitter.

even though there is a meta information especially for them with the twitter:image`. And their validator claims that the card is correct.

On the other hand, if I create a Tweet it works as expected

Tweet composed directly on Twitter containing the link, correctly processed

When I tried with Friendica, after pasting in the link to the Ada webpage the preview data for the attachment were fetched and correctly found (open graph or twitter header info).

Post preview on Friendica - correct image is fetched

And with Misskey it works as well.

Posting on Misskey, with the correct image in the preview

However when looking at the above postings in my Mastodon timeline the open graph image is not shown (even though it is displayed in the other platforms network streams).

E.g. this [OpenSuSE posting about Ada & Zangeman](https://fosstodon.org/@opensuse/110626726170591526) on Mastodon. ![Screenshot from Mastodon where the wrong preview image was used](/attachments/6c9f11e2-703f-4a97-97fb-ece6bb5248c0) Twitter seems to have problems as well ![Screenshot of the corresponding posting from OpenSUSE on Twitter. ](/attachments/fd506f61-2327-4a2a-9f6b-c53b8839d3d0) even though there is a meta information especially for them with the twitter:image`. And their validator claims that the card is correct. On the other hand, if I create a Tweet it works as expected ![Tweet composed directly on Twitter containing the link, correctly processed](/attachments/d484cae2-db1a-400a-8ca4-f4a5c2623e02) When I tried with Friendica, after pasting in the link to the Ada webpage the preview data for the attachment were fetched and correctly found (open graph or twitter header info). ![Post preview on Friendica - correct image is fetched](/attachments/af4c5692-38b1-4b36-bb38-138dcf3ff4f6) And with Misskey it works as well. ![Posting on Misskey, with the correct image in the preview](/attachments/b8a3c936-e9b5-4c90-8c8a-11193d66a939) However when looking at the above postings in my Mastodon timeline the open graph image is not shown (even though it is displayed in the other platforms network streams).
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tobiasd commented 2023-06-30 09:33:30 +00:00
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For Mastodon there exists an open issue about the incoherence of the displays github mastodon/mastodon 16479.

For Mastodon there exists an open issue about the incoherence of the displays [github mastodon/mastodon 16479](https://github.com/mastodon/mastodon/issues/16479).
tobiasd commented 2023-06-30 09:37:14 +00:00
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@mk so to answer you

Can someone check, what I did wrong?

I don't think you did. Different vectors of receiving the information about "a link exists in the posting" on the different platforms seem to interpret the information differently even within the same platform.

@mk so to answer you > Can someone check, what I did wrong? I don't think you did. Different vectors of receiving the information about "a link exists in the posting" on the different platforms seem to interpret the information differently even within the same platform.
mk commented 2023-07-03 09:52:19 +00:00
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Thank you @tobiasd .

Thank you @tobiasd .
delliott commented 2025-04-27 14:25:01 +00:00
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@tobiasd , can this be closed?

@tobiasd , can this be closed?
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Reference: FSFE/fsfe-website#3540
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