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[Bug] Paid-content 10% video previews unplayable (truncated MP4) #35

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opened 2026-06-16 10:40:24 +00:00 by lfg2025 · 3 comments
lfg2025 commented 2026-06-16 10:40:24 +00:00
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content.preview-peer returns base64 of the first ~10% of the file; for non-faststart MP4 the moov atom is at the end, so a 10% prefix will not play. Free content streams fine via /api/peer-content (Range). Fix needs backend: generate proper preview clips (ffmpeg faststart / first-N-seconds) or serve previews moov-first. Frontend now shows a clear error overlay (commit c481afc7). (Found 2026-06-16)

content.preview-peer returns base64 of the first ~10% of the file; for non-faststart MP4 the moov atom is at the end, so a 10% prefix will not play. Free content streams fine via /api/peer-content (Range). Fix needs backend: generate proper preview clips (ffmpeg faststart / first-N-seconds) or serve previews moov-first. Frontend now shows a clear error overlay (commit c481afc7). (Found 2026-06-16)
lfg2025 commented 2026-06-16 14:38:42 +00:00
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Deferred: needs the serving node to generate a real preview clip (ffmpeg faststart / first-N-seconds). Frontend now shows a clean error overlay instead of a black box.

Deferred: needs the serving node to generate a real preview clip (ffmpeg faststart / first-N-seconds). Frontend now shows a clean error overlay instead of a black box.
lfg2025 commented 2026-06-17 11:45:08 +00:00
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STATUS: pure-Rust MP4 fix approach approved earlier but not yet implemented this session (focus was on the live fleet bugs + the DHT merge). Still open; next when prioritised.

STATUS: pure-Rust MP4 fix approach approved earlier but not yet implemented this session (focus was on the live fleet bugs + the DHT merge). Still open; next when prioritised.
lfg2025 commented 2026-06-17 17:34:47 +00:00
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Fixed: the preview path no longer streams an unplayable byte-prefix for non-faststart MP4s. content_server.rs now scans the MP4 top-level boxes and only serves a truncated preview when the file is faststart (moov before mdat, i.e. a prefix is playable); non-faststart media returns a new PreviewUnavailable (HTTP 415 + X-Content-Preview: unavailable) so the UI shows its 'preview unavailable' overlay (shipped c481afc7) instead of a stuck player. Unit tests detects_faststart_* pass. NOTE: full preview-clip generation (re-encode/first-N-seconds) is a separate enhancement — it needs ffmpeg, which isn't on the node host (would run via the IndeeHub ffmpeg container).

Fixed: the preview path no longer streams an unplayable byte-prefix for non-faststart MP4s. `content_server.rs` now scans the MP4 top-level boxes and only serves a truncated preview when the file is faststart (`moov` before `mdat`, i.e. a prefix is playable); non-faststart media returns a new `PreviewUnavailable` (HTTP 415 + `X-Content-Preview: unavailable`) so the UI shows its 'preview unavailable' overlay (shipped c481afc7) instead of a stuck player. Unit tests `detects_faststart_*` pass. NOTE: full preview-clip generation (re-encode/first-N-seconds) is a separate enhancement — it needs ffmpeg, which isn't on the node host (would run via the IndeeHub ffmpeg container).
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Reference: lfg2025/archy#35
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