ffmpuzzle
Puzzle #6 · Hard · 6 params

H.264 · CRF 18 · 1080p · AAC · MP4

The scenario

Archival master for a wedding videography studio. H.264 for universal playback, CRF 18 for near-lossless quality that clients can re-edit years later, slow preset for maximum compression efficiency on overnight batch encodes.

The answer

Video CodecH.264
CRF18
Resolution1080p
AudioAAC
ContainerMP4
Presetslow

The command

ffmpeg -i input.mov -c:v libx264 -crf 18 -preset slow -c:a aac -b:a 192k -movflags +faststart output.mp4

Why

CRF 18 is often called "visually lossless" for H.264. Below CRF 17, file sizes balloon with no perceptible quality gain. The slow preset adds ~40% encode time vs medium but saves ~5-10% bitrate at the same quality.

Play

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