ffmpuzzle
Puzzle #10 · Hard · 6 params

AV1 · CRF 35 · 480p · Opus · WebM

The scenario

Low-bandwidth video delivery for an educational NGO in rural Sub-Saharan Africa. AV1 for maximum compression at 480p, CRF 35 to aggressively save bandwidth on 2G/3G connections, preset 8 for faster server-side encoding at scale.

The answer

Video CodecAV1
CRF35
Resolution480p
AudioOpus
ContainerWebM
Preset8

The command

ffmpeg -i input.mp4 -c:v libsvtav1 -crf 35 -preset 8 -vf scale=-2:480 -c:a libopus -b:a 64k output.webm

Why

At 480p, AV1 at CRF 35 can deliver watchable video at under 200 kbps — roughly 90 MB per hour. H.264 at equivalent quality would need 400+ kbps, making AV1 transformative for emerging markets with metered data.

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