Merge pull request #1261 from nostr-protocol/nip71-imeta

NIP-71: `imeta`

2 files changed, 71 insertions, 59 deletions

diff --git a/71.md b/71.md
index dd813e9..5edd7c6 100644
--- a/71.md
+++ b/71.md
@@ -20,21 +20,60 @@ The format uses an _addressable event_ kind `34235` for horizontal videos and `3
 
 The `.content` of these events is a summary or description on the video content.
 
-The list of tags are as follows:
-* `d` (required) universally unique identifier (UUID). Generated by the client creating the video event.
-* `url` (required) the url to the video file
-* `m` a string indicating the data type of the file. The [MIME types](https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Common_types) format must be used, and they should be lowercase.
+The primary source of video information is the `imeta` tags which is defined in [NIP-92](92.md)
+
+Each `imeta` tag can be used to specify a variant of the video by the `dim` & `m` properties.
+
+Example:
+```json
+[
+  ["imeta", 
+    "dim 1920x1080",
+    "url https://myvideo.com/1080/12345.mp4",
+    "x 3093509d1e0bc604ff60cb9286f4cd7c781553bc8991937befaacfdc28ec5cdc",
+    "m video/mp4",
+    "image https://myvideo.com/1080/12345.jpg",
+    "image https://myotherserver.com/1080/12345.jpg",
+    "fallback https://myotherserver.com/1080/12345.mp4",
+    "fallback https://andanotherserver.com/1080/12345.mp4",
+    "service nip96",
+  ],
+  ["imeta", 
+    "dim 1280x720",
+    "url https://myvideo.com/720/12345.mp4",
+    "x e1d4f808dae475ed32fb23ce52ef8ac82e3cc760702fca10d62d382d2da3697d",
+    "m video/mp4",
+    "image https://myvideo.com/720/12345.jpg",
+    "image https://myotherserver.com/720/12345.jpg",
+    "fallback https://myotherserver.com/720/12345.mp4",
+    "fallback https://andanotherserver.com/720/12345.mp4",
+    "service nip96",
+  ],
+  ["imeta", 
+    "dim 1280x720",
+    "url https://myvideo.com/720/12345.m3u8",
+    "x 704e720af2697f5d6a198ad377789d462054b6e8d790f8a3903afbc1e044014f",
+    "m application/x-mpegURL",
+    "image https://myvideo.com/720/12345.jpg",
+    "image https://myotherserver.com/720/12345.jpg",
+    "fallback https://myotherserver.com/720/12345.m3u8",
+    "fallback https://andanotherserver.com/720/12345.m3u8",
+    "service nip96",
+  ],
+]
+```
+
+Where `url` is the primary server url and `fallback` are other servers hosting the same file, both `url` and `fallback` should be weighted equally and clients are recommended to use any of the provided video urls.
+
+The `image` tag contains a preview image (at the same resolution). Multiple `image` tags may be used to specify fallback copies in the same way `fallback` is used for `url`.
+
+Additionally `service nip96` may be included to allow clients to search the authors NIP-96 server list to find the file using the hash.
+
+### Other tags:
 * `title` (required) title of the video
-* `"published_at"`, for the timestamp in unix seconds (stringified) of the first time the video was published
-* `x` containing the SHA-256 hexencoded string of the file.
-* `size` (optional) size of file in bytes
-* `dim` (optional) size of file in pixels in the form `<width>x<height>`
+* `published_at`, for the timestamp in unix seconds (stringified) of the first time the video was published
 * `duration` (optional) video duration in seconds
-* `magnet` (optional) URI to magnet file
-* `i` (optional) torrent infohash
 * `text-track` (optional, repeated) link to WebVTT file for video, type of supplementary information (captions/subtitles/chapters/metadata), optional language code
-* `thumb` (optional) url of thumbnail with same aspect ratio
-* `image` (optional) url of preview image with same dimensions
 * `content-warning` (optional) warning about content of NSFW video
 * `alt` (optional) description for accessibility
 * `segment` (optional, repeated) start timestamp in format `HH:MM:SS.sss`, end timestamp in format `HH:MM:SS.sss`, chapter/segment title, chapter thumbnail-url
@@ -53,19 +92,23 @@ The list of tags are as follows:
     ["d", "<UUID>"],
 
     ["title", "<title of video>"],
-    ["thumb", "<thumbnail image for video>"],
     ["published_at", "<unix timestamp>"],
     ["alt", <description>],
 
     // Video Data
-    ["url",<string with URI of file>],
-    ["m", <MIME type>],
-    ["x",<Hash SHA-256>],
-    ["size", <size of file in bytes>],
+    ["imeta", 
+      "dim 1920x1080",
+      "url https://myvideo.com/1080/12345.mp4",
+      "x 3093509d1e0bc604ff60cb9286f4cd7c781553bc8991937befaacfdc28ec5cdc",
+      "m video/mp4",
+      "image https://myvideo.com/1080/12345.jpg",
+      "image https://myotherserver.com/1080/12345.jpg",
+      "fallback https://myotherserver.com/1080/12345.mp4",
+      "fallback https://andanotherserver.com/1080/12345.mp4",
+      "service nip96",
+    ],
+
     ["duration", <duration of video in seconds>],
-    ["dim", <size of file in pixels>],
-    ["magnet",<magnet URI> ],
-    ["i",<torrent infohash>],
     ["text-track", "<encoded `kind 6000` event>", "<recommended relay urls>"],
     ["content-warning", "<reason>"],
     ["segment", <start>, <end>, "<title>", "<thumbnail URL>"],
@@ -83,36 +126,4 @@ The list of tags are as follows:
     ["r", "<url>"]
   ]
 }
-```
-
-## Video View
-
-A video event view is a response to a video event to track a user's view or progress viewing the video.
-
-### Format
-
-The format uses an _addressable event_ kind `34237`.
-
-The `.content` of these events is optional and could be a free-form note that acts like a bookmark for the user.
-
-The list of tags are as follows:
-* `a` (required) reference tag to kind `34235` or `34236` video event being viewed
-* `d` (required) same as `a` reference tag value
-* `viewed` (optional, repeated) timestamp of the user's start time in seconds, timestamp of the user's end time in seconds
-
-
-```json
-{
-  "id": <32-bytes lowercase hex-encoded SHA-256 of the the serialized event data>,
-  "pubkey": <32-bytes lowercase hex-encoded public key of the event creator>,
-  "created_at": <Unix timestamp in seconds>,
-  "kind": 34237,
-  "content": "<note>",
-  "tags": [
-    ["a", "<34235 | 34236>:<video event author pubkey>:<d-identifier of video event>", "<optional relay url>"],
-    ["e", "<event-id", "<relay-url>"]
-    ["d", "<34235 | 34236>:<video event author pubkey>:<d-identifier of video event>"],
-    ["viewed", <start>, <end>],
-  ]
-}
-```
+```
\ No newline at end of file
diff --git a/94.md b/94.md
index a057cb2..021cc4c 100644
--- a/94.md
+++ b/94.md
@@ -26,6 +26,7 @@ This NIP specifies the use of the `1063` event type, having in `content` a descr
 * `summary` (optional) text excerpt
 * `alt` (optional) description for accessibility
 * `fallback` (optional) zero or more fallback file sources in case `url` fails
+* `service` (optional) service type which is serving the file (eg. [NIP-96](96.md))
 
 ```jsonc
 {
@@ -33,15 +34,15 @@ This NIP specifies the use of the `1063` event type, having in `content` a descr
   "tags": [
     ["url",<string with URI of file>],
     ["m", <MIME type>],
-    ["x",<Hash SHA-256>],
-    ["ox",<Hash SHA-256>],
+    ["x", <Hash SHA-256>],
+    ["ox", <Hash SHA-256>],
     ["size", <size of file in bytes>],
     ["dim", <size of file in pixels>],
-    ["magnet",<magnet URI> ],
-    ["i",<torrent infohash>],
+    ["magnet", <magnet URI> ],
+    ["i", <torrent infohash>],
     ["blurhash", <value>],
-    ["thumb", <string with thumbnail URI>],
-    ["image", <string with preview URI>],
+    ["thumb", <string with thumbnail URI>, <Hash SHA-256>],
+    ["image", <string with preview URI>, <Hash SHA-256>],
     ["summary", <excerpt>],
     ["alt", <description>]
   ],