Why architecture matters here
Transcoding fails on cost surprises, QC gaps, and idempotency issues. Architecture matters because segment + ladder + QC combine.
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The architecture: every piece explained
The top strip is encode. Upload / master. Segment. Encode ladder. Codec choice.
The middle row is delivery. Packager. Storage tiers. QC. Idempotency.
The lower rows are ops. Metadata. Analytics. Ops — job scheduler + hw encoders + failure.
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End-to-end flow
End-to-end: master uploaded. Segmented into 10-min chunks. Parallel encode ladder for 5 renditions in H.264 + AV1. Packaged into HLS+DASH. QC via VMAF. Stored in hot tier; lifecycle to cold after 90d.