Thumbnail preview video for an e-commerce product page. AV1 at aggressive CRF 38 and fast preset 10 for tiny file sizes (~100KB for 5-second clips), 720p, AAC/MP4. Each product has a hover-to-play preview that must load instantly.
| Video Codec | AV1 |
| CRF | 38 |
| Resolution | 720p |
| Audio | AAC |
| Container | MP4 |
| Preset | 10 |
ffmpeg -i input.mp4 -c:v libsvtav1 -crf 38 -preset 10 -vf scale=-2:720 -c:a aac -b:a 64k output.mp4E-commerce video previews need to be under 200KB to avoid impacting page load time. At CRF 38, AV1 can encode a 5-second 720p product spin video to ~80KB — small enough to preload alongside the product thumbnail image.
A new FFmpeg encoding puzzle every day. Six tries, in the browser or from your terminal.