H.265 and Smart Codec Storage Savings for a 32-Camera Factory: TB and ₹ Over 30, 45 and 90 Days
Switching 32 4MP cameras from H.264 to H.265 saves about 22–32 TB of disk over 45 days, per Hikvision's bitrate sheet and peer-reviewed HEVC figures (checked 14 Oct 2026). At an assumed ₹2,500–₹3,500 per TB, that is roughly ₹54,000–₹1.1 lakh. Smart codec adds less on a busy floor than the "up to 50%" in Hikvision's manual.
Last checked: 14 Oct 2026
Verified against
- ITU press release, ITU approves new video coding standard H.265, Geneva, 25 Jan 2013 — itu.int
- Ohm, Sullivan, Schwarz, Tan, Wiegand, Comparison of the Coding Efficiency of Video Coding Standards — Including HEVC, IEEE TCSVT vol. 22 no. 12, 2012 — Microsoft Research abstract
- Li, Xu, Sullivan, Compression performance of HEVC and its format range and screen content coding extensions, Proc. SPIE 9599, 2015 — Microsoft Research abstract
- Hikvision, H.264(5) & H.264(5)+ Recommended Bit Rate at General Resolutions (FAQ PDF, 4 pages: H.264, H.264+, H.265 and H.265+ tables) — PDF
- Hikvision, What's H.265+? — hikvision.com
- Hikvision, Baseline User Manual of Network Camera V5.6.5 (UD19347B-C, 28 Dec 2023), pp. 98–99 — PDF
- Dahua, Network Video Recorder User's Manual V4.4.7 (Sep 2019), §4.2.5 and Appendix 2 "HDD Capacity Calculation" — PDF
- Axis, Zipstream technology white paper (July 2026), §3–5 — PDF
- CP Plus, Network Camera User Manual V1.0.1, §4.5.2 — PDF
- Checked 14 Oct 2026
- The ₹ per TB below is a stated assumption, cross-checked against retailer listings in the inputs table.
The inputs, and where each comes from
| Input | Value used | Source |
|---|---|---|
| H.264 bitrate, 4MP (2560×1440) at 15 fps | 4,096 kbps | Hikvision recommended bit rate PDF, H.264 table |
| H.265 bitrate, 4MP at 15 fps | 2,048 kbps (half the H.264 value) | Same PDF, H.265 table |
| H.265+ bitrate, 4MP at 15 fps | target 1,440 kbps, max 2,048 kbps | Same PDF, H.265+ table |
| Complex-scene allowance | +20–30% on the recommended rate | Same PDF, Note 1 |
| H.265 vs H.264, equal subjective quality | ~50% less bitrate | ITU, 25 Jan 2013; Ohm et al. 2012 |
| H.265 vs H.264, equal PSNR | 23% all-intra, 34% random access, 38% low-delay | Li, Xu, Sullivan 2015 |
| H.265+ vs H.265 | "up to 50%" "in most scenes" | Hikvision manual V5.6.5 p. 98 |
| Smart codec, measured scenes | 25% (well-lit, occasional motion) to 99.7% (night, very infrequent motion) | Axis Zipstream white paper pp. 10–11 |
| Disk per day | 1 Mbps continuous = 10.8 GB/day | Arithmetic; same method as Dahua NVR manual Appendix 2 |
| Disk price | ₹2,500–₹3,500 per TB | Assumption. PrimeABGB.com listed prices on 14 Oct 2026, all marked out of stock: WD Purple 4 TB WD43PURZ ₹10,550 (₹2,638/TB); WD Purple Pro 8 TB WD8002PURP ₹19,022 (₹2,378/TB); Seagate SkyHawk 4 TB ST4000VX016 ₹15,646 (₹3,912/TB). Replace with your distributor's quote |
The bitrates come from Hikvision's sheet at 15 fps, the frame rate the storage calculator also assumes. The NVR days table uses the same sheet at 25 fps, where the H.264 and H.265 values are exactly double (8,192 and 4,096 kbps for 4MP). At 25 fps, every TB and ₹ figure in the H.264 and H.265 rows below doubles; the percentages stay the same.
Dahua's NVR manual gives the sizing method in four steps: capacity per hour from bit rate, times hours recorded per day, times days kept, summed over channels. Dahua's formula divides by 1,024, so its per-hour figure comes out about 2% smaller than the decimal figures used here.
TB and ₹ saved for 32 cameras
The baseline is 32 cameras at 4MP and 15 fps, recording 24 hours a day on H.264 at 4,096 kbps. That baseline is 44.2 GB per camera per day, or 1.42 TB per day for the plant.
| Scenario (bitrate) | TB/day, 32 cams | 30 days (TB) | 45 days (TB) | 90 days (TB) |
|---|---|---|---|---|
| H.264 (4,096 kbps) | 1.42 | 42.5 | 63.7 | 127.4 |
| H.265, conservative −34% (2,703 kbps) | 0.93 | 28.0 | 42.0 | 84.1 |
| H.265, Hikvision sheet −50% (2,048 kbps) | 0.71 | 21.2 | 31.9 | 63.7 |
| H.265+ target, Hikvision sheet (1,440 kbps) | 0.50 | 14.9 | 22.4 | 44.8 |
| Smart codec ceiling, extra −50% (1,024 kbps) | 0.35 | 10.6 | 15.9 | 31.9 |
The conservative row uses the 34% random-access PSNR figure from Li, Xu and Sullivan. The H.265+ row uses the "target bitrate" in Hikvision's sheet, about 30% below its H.265 value at 15 fps. That is close to Axis's lowest measured Zipstream example, 25% for a well-lit scene with occasional motion. The last row is Hikvision's "up to 50%" ceiling from the camera manual. A floor full of moving machines should not be sized on it.
Savings against H.264, at the assumed ₹2,500–₹3,500 per TB:
| Move from H.264 to… | Saved over 30 days | Saved over 45 days | Saved over 90 days |
|---|---|---|---|
| H.265, conservative | 14.4 TB · ₹36,100–₹50,500 | 21.7 TB · ₹54,100–₹75,800 | 43.3 TB · ₹1.08–1.52 lakh |
| H.265, −50% | 21.2 TB · ₹53,100–₹74,300 | 31.9 TB · ₹79,600–₹1.11 lakh | 63.7 TB · ₹1.59–2.23 lakh |
| H.265+ target (1,440 kbps) | 27.5 TB · ₹68,800–₹96,400 | 41.3 TB · ₹1.03–1.45 lakh | 82.6 TB · ₹2.07–2.89 lakh |
In 8 TB drives, the 45-day H.264 build needs eight drives of raw capacity. The −50% H.265 build needs four. That gap is before RAID parity and the TB-vs-TiB loss, which the storage calculator covers. For a quick check of days per 4 TB or 8 TB recorder, see the NVR days table.
Where brands differ
- What the percentage is measured against. Hikvision's manual compares H.265+ with H.265 "with the same maximum bitrate". Hikvision's H.265+ page claims "about 32.4% of the bitrate of H.265 on average", for scenes where the background "rarely changes". Axis compares Zipstream with "standard compression" and reports "an average of 50% or more". The ITU figure compares H.265 with H.264. These numbers do not stack cleanly.
- How disk is estimated. Hikvision says that with H.265+ on, "users can estimate the HDD consumption by its maximum average bitrate", settable from 32 Kbps up to the max bitrate. Size from that field, not from the brochure percentage.
- What smart codec switches off. Hikvision greys out profile, I-frame interval, video quality and SVC. CP Plus says that with Smart Codec or AI Codec on, the camera "would stop supporting the third stream, ROI, and smart event detection". CP Plus labels Smart Codec for "static scenes".
- Recorder defaults. Dahua's NVR manual marks H.265 "recommended". It also offers H.265 Auto Switch, which moves newly added cameras to H.265.
What breaks in a factory
- Constant motion. Conveyors, spindles, fans and forklifts keep most of the frame changing. Every vendor's large saving depends on a still background. On a production line, plan from the H.265 rows and treat smart codec as a bonus.
- Busy scenes need more bitrate. Hikvision's own PDF says to raise the recommended rate by 20–30% for complex scenes. Apply that to every row and the savings in TB rise by the same share.
- Adaptation after a power cut. Hikvision says H.265+ needs "at least 24 hours to adapt to a fixed monitoring scene". The manual does not say whether a reboot resets this; not found in the V5.6.5 manual (checked 14 Oct 2026).
- Analytics streams. Keep smart codec off on the stream that analytics reads; the sub-stream settings guide covers that stream.
- Old players and third-party boxes. A recorder that cannot decode H.265 shows a blank channel. Hikvision advises upgrading the player if playback fails "due to compatibility". Check the ONVIF/RTSP compatibility matrix before switching a mixed fleet.
When to call the installer / what to ask the vendor
Ask the installer to read the real average bitrate off the recorder for one full production day, first with H.265 and then with smart codec on. Multiply each by 10.8 to get GB per camera per day, then re-run the tables above. Ask the vendor in writing which features smart codec disables on your model and firmware. If drives are being replaced anyway, first check that the recorder decodes H.265 on every channel.
Mama reads existing cameras over RTSP/ONVIF and tells the owner where machines stood idle. A standard H.265 stream with smart codec off on the analytics stream suits that well. More at askthemama.com. Leave an email or phone in the form below.
FAQ
How much storage does H.265 save compared to H.264? The ITU stated in January 2013 that H.265 needs "only half the bit rate" of H.264, and Hikvision's recommended bitrate sheet halves the 4MP rate (4,096 to 2,048 kbps at 15 fps). Peer-reviewed tests found about 50% at equal subjective quality and 23–38% at equal PSNR. For 32 4MP cameras over 45 days, that is about 22–32 TB.
How much storage does H.265+ save? Hikvision's camera manual V5.6.5 says H.265+ "reduces storage by up to 50%" compared with H.265 at the same maximum bitrate in most scenes. That is a ceiling. Hikvision's own bitrate sheet sets a 4MP, 15 fps H.265+ target of 1,440 kbps against 2,048 kbps for H.265, about 30% less. Axis's measured examples range from 25% to 99.7% depending on scene motion and light.
Is H.265 better than H.264 for CCTV? For disk, yes: Hikvision's manual says H.265 lowers bitrate at the same resolution, frame rate and image quality, and Dahua's NVR manual marks it "recommended". The cost is compatibility. Older recorders, players and analytics boxes may not decode H.265.