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NIP-71 feat: video multiple audio tracks (#2255)

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Co-authored-by: fiatjaf <fiatjaf@gmail.com>
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Leo
2026-05-28 22:51:52 +02:00
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parent 3b73d29e94
commit 8495a59c98
1 changed files with 24 additions and 1 deletions
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71.md
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@@ -38,12 +38,16 @@ The `.content` of these events is a summary or description on the video content.
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.
Each `imeta` tag can be used to specify a variant of the video by the `dim` & `m` properties, as well as multiple audio tracks (languages).
Clients should check if audio tracks are available and prefer them over in-video audio
to allow smooth resolution switching without interrupting audio. The `ov` (original version) flags the original language track.
This NIP defines the following additional `imeta` properties aside from those listed in [NIP-92](92.md) & [NIP-94](94.md):
* `duration` (recommended) the duration of the video/audio in seconds (floating point number)
* `bitrate` (recommended) the average bitrate of the video/audio in bits/sec
* `waveform` (optional, audio only) amplitude values over time, space separated full integers, less than 100 values should be enough to render a nice visual
Example:
```json
@@ -86,6 +90,18 @@ Example:
"service nip96",
"duration 29.21"
],
["imeta",
"url https://myaudio.com/audio/en/12345.mp3",
"x b2e0a7a82ac9f3f3a71f1d9a78c381d5be9d1cf19dce258765c17c8a76287c93",
"m audio/mp3",
"waveform 0 7 35 8 100 100 49 8 4 16 8 10 7 2 20 10 100 100 100 100 100 100 15 100 100 100 25 60 5 4 3 1 0 100 100 15 100 29 88 0 33 11 39 100 100 19 4 100 42 35 5 0 1 5 0 0 11 38 100 94 17 11 44 58 5 100 100 100 55 14 72 100 100 57 6 1 14 2 16 100 100 40 16 100 100 6 32 14 13 41 36 16 14 6 3 0 1 2 1 6 0",
"l en ISO-639-1 ov",
"fallback https://myotherserver.com/audio/en/12345.mp3",
"fallback https://andanotherserver.com/audio/en/12345.mp3",
"service nip96",
"bitrate 320000",
"duration 29.24"
],
]
```
@@ -180,6 +196,13 @@ Additionally `service nip96` may be included to allow clients to search the auth
"image https://example.com/thumb.jpg",
"x 3093509d1e0bc604ff60cb9286f4cd7c781553bc8991937befaacfdc28ec5cdc"
],
// audio data
["imeta",
"url https://example.com/audio.mp3",
"x b2e0a7a82ac9f3f3a71f1d9a78c381d5be9d1cf19dce258765c17c8a76287c93",
"m audio/mp3",
"l en ISO-639-1 ov"
],
["duration", <duration in seconds>],
["content-warning", "<reason>"],