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host.
No public Blossom host transcodes (nostr.build's and primal's BUD-05 /media
return the same bitrate), so a 15-20 Mbps phone clip stalled on playback.
src/video-compress.js re-encodes on the device with WebCodecs via
Mediabunny (a lazily loaded chunk, left out of the SW precache and the
standalone file): H.264, short edge 720, ~2.5 Mbps, moov first, audio
passed through, rotation baked in. Anything short of a clear win uploads
the original. A toast counts the shrinking down.
Media hosts: blossom.nostr.build first, nostr.download second (it was
unreachable for hours); a HEAD probe skips a host that doesn't answer
within 5 s instead of waiting out the whole upload timeout.
video-compress-test: 1080p 20 Mbps 5 s (landscape and rotated portrait) →
1.6 MB H.264 720p 2.49 Mbps with audio, moov first, in 2-3 s.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Du1qT1wbkYwYK6zkGH79Rp
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