Video codec comparison
AV1 vs H.264
AV1 compresses about 50% more efficiently than H.264 — same visual quality at half the bitrate. The trade-off is hardware support: every device made since 2010 decodes H.264 in hardware; AV1 hardware decode arrived in consumer chips around 2022 and is still spotty on older devices. For YouTube specifically: pick AV1 for the smaller file size when your destination supports it, H.264 for universal compatibility.
Side-by-side
| Feature | AV1 | H.264 | Winner |
|---|---|---|---|
| Compression efficiency | ~50% better than H.264 | Baseline | AV1 |
| Encoding speed | 10-50x slower (software) | Fastest of major codecs | H.264 |
| Decoding speed | Similar with hardware | Fast everywhere | H.264 |
| Hardware decode support | 2022+ chips (iPhone 15+, RTX 40, etc.) | Every device since ~2010 | H.264 |
| Licensing fees | Free (royalty-free) | Patent pool | AV1 |
| YouTube serves | Yes (modern browsers) | Yes (universal fallback) | Tied |
| File size at 1080p | ~2.5 Mbps for transparent | ~6 Mbps for transparent | AV1 |
| Editing software support | Improving, some lag | Universal | H.264 |
AV1 wins on
- About 50% smaller file size at the same visual quality.
- Royalty-free — no licensing fees for encoders or decoders.
- Modern codec features: tile parallelism, scalable encoding.
- Better at very low bitrates (sub-1 Mbps content stays watchable).
H.264 wins on
- Universal hardware decode — every device since ~2010 plays it.
- Fastest encoding of any major codec — 10-50x faster than AV1 encode.
- Mature ecosystem: every editing tool, every NLE, every streaming pipeline.
- Predictable behavior across encoders (x264, hardware, etc.).
Verdict
For downloads where compatibility matters more than file size (sending to others, older devices, archive that needs to play in 20 years): H.264. For everything else — your own viewing on modern devices, storage-constrained backups, web embedding on modern browsers — AV1's 50% size reduction is dominant value. VidPickr offers both for every video that has them.