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90 lines
3.2 KiB
Markdown
90 lines
3.2 KiB
Markdown
NIP-68
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======
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Picture-first feeds
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-------------------
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`draft` `optional`
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This NIP defines event kind `20` for picture-first clients. Images must be self-contained. They are hosted externally and referenced using `imeta` tags
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Unlike a `kind 1` event with a pircture attached, Picture events are meant to contain all additional metadata concerning the subject media and to be surfaced in picture-specific clients rather than general micro-blogging clients. The thought is for events of this kind to be referenced in a Instagram/Flickr/Snapshat/9gag like nostr client where the picture itself is at the center of the experience.
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## Picture Events
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Picture events contain a `title` tag and description in the `.content`.
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They may contain multiple images to be displayed as a single post.
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```jsonc
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{
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"id": <32-bytes lowercase hex-encoded SHA-256 of the the serialized event data>,
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"pubkey": <32-bytes lowercase hex-encoded public key of the event creator>,
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"created_at": <Unix timestamp in seconds>,
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"kind": 20,
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"content": "<description of post>",
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"tags": [
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["title", "<short title of post>"],
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// Picture Data
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[
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"imeta",
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"url https://nostr.build/i/my-image.jpg",
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"m image/jpeg",
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"blurhash eVF$^OI:${M{o#*0-nNFxakD-?xVM}WEWB%iNKxvR-oetmo#R-aen$",
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"dim 3024x4032",
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"alt A scenic photo overlooking the coast of Costa Rica",
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"x <sha256 hash as specified in NIP 94>",
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"fallback https://nostrcheck.me/alt1.jpg",
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"fallback https://void.cat/alt1.jpg"
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],
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[
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"imeta",
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"url https://nostr.build/i/my-image2.jpg",
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"m image/jpeg",
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"blurhash eVF$^OI:${M{o#*0-nNFxakD-?xVM}WEWB%iNKxvR-oetmo#R-aen$",
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"dim 3024x4032",
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"alt Another scenic photo overlooking the coast of Costa Rica",
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"x <sha256 hash as specified in NIP 94>",
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"fallback https://nostrcheck.me/alt2.jpg",
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"fallback https://void.cat/alt2.jpg",
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"annotate-user <32-bytes hex of a pubkey>:<posX>:<posY>" // Tag users in specific locations in the picture
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],
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["content-warning", "<reason>"], // if NSFW
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// Tagged users
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["p", "<32-bytes hex of a pubkey>", "<optional recommended relay URL>"],
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["p", "<32-bytes hex of a pubkey>", "<optional recommended relay URL>"],
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// Specify the media type for filters to allow clients to filter by supported kinds
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["m", "image/jpeg"],
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["x", "<sha256>"]
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// Hashtags
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["t", "<tag>"],
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["t", "<tag>"],
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// location
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["location", "<location>"], // city name, state, country
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["g", "<geohash>"],
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// When text is written in the image, add the tag to represent the language
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["L", "ISO-639-1"],
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["l", "en", "ISO-639-1"]
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]
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}
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```
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The `imeta` tag `annotate-user` places a user link in the specific position in the image.
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Only the following media types are accepted:
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- `image/apng`: Animated Portable Network Graphics (APNG)
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- `image/avif`: AV1 Image File Format (AVIF)
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- `image/gif`: Graphics Interchange Format (GIF)
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- `image/jpeg`: Joint Photographic Expert Group image (JPEG)
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- `image/png`: Portable Network Graphics (PNG)
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- `image/webp`: Web Picture format (WEBP)
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Picture events might be used with [NIP-71](71.md)'s kind `34236` to display short vertical videos in the same feed. |