Compression shrinks video before it's recorded. H.265 (HEVC) is the newer standard and typically needs noticeably less data than H.264 for similar quality, often around half in favourable scenes. H.265+ and similar 'smart' codecs go further by recording static backgrounds less often, which helps most on quiet scenes.
Key takeaways
- H.265 usually saves significant storage and bandwidth over H.264.
- Smart codecs (H.265+) save most on static scenes; busy scenes save less.
- Check that the recorder, software and viewing devices support H.265.
- Saved storage can buy more days of recording or higher resolution.
01Why compression matters
Uncompressed video would fill a hard drive in hours. Compression keeps a full picture only occasionally (key frames) and in between stores only what changed. Better compression means more days on the same drives and smoother remote viewing on slower connections.
02The comparison
| H.264 | H.265 | H.265+ (smart codec) | |
|---|---|---|---|
| Age | Older, universal | Newer (HEVC) | Hikvision enhancement on H.265 |
| Data for similar quality | Baseline | Often around half in favourable scenes | Lower still on static scenes |
| Compatibility | Plays almost anywhere | Most modern devices | Needs compatible recorder/software |
| Best for | Mixed older systems | Most new installations | Quiet scenes: offices at night, perimeters |
03Putting the savings to work
The storage saved can extend retention (30 days instead of 14), allow higher resolution, or reduce hard-drive cost. Work out your numbers with the storage calculator guide and recording duration guide.
04Frequently asked questions
Should I switch my cameras to H.265?
If your recorder and viewing apps support it, usually yes: it saves storage and bandwidth.
Is H.265 lower quality than H.264?
Not at the same bitrate. H.265 is more efficient, giving similar or better quality with less data.
Why does my old software not play H.265 footage?
Older players and some browsers don't support H.265. Use the manufacturer's player or export in a compatible format.
