H.265 vs AV1: Which Codec Fits Your Workflow?

Choosing between H.265 and AV1 is no longer a theoretical video codec comparison. Both codecs ship in real hardware, stream across major platforms, and influence bandwidth bills every month. The right choice depends on how you encode, where you play, and what you plan to do with the files in five or ten years.

This article breaks down H.265 vs AV1 in practical terms: what each codec does, how they compress video, where they run well, and how licensing affects long‑term planning.

H.265 vs AV1 in plain language

What H.265 actually is

H.265, also known as HEVC (High Efficiency Video Coding), is a video compression standard from the ITU-T and ISO/IEC groups. It was designed as the successor to H.264/AVC.

In simple terms, H.265 shrinks video files by analyzing how pixels change from frame to frame and how they relate within each frame. It groups similar areas into blocks, predicts how they move, and stores only the differences plus some metadata. Compared with H.264, it uses larger and more flexible blocks, better motion prediction, and more advanced filtering. The result is roughly the same visual quality at about half the bitrate for many types of content.

A concrete example: a 1080p, 30 fps, 10‑minute talking‑head video encoded with H.264 at 8 Mbps might be around 600 MB. The same content encoded with H.265 at 4 Mbps can look similar to most viewers while dropping the size to roughly 300 MB.

H.265 is widely used in 4K streaming, UHD Blu‑ray, broadcast contribution links, and many consumer cameras.

What AV1 actually is

AV1 is a newer open video codec from the Alliance for Open Media (AOM), whose members include Google, Netflix, Amazon, Microsoft, Meta, and many others. It was designed to deliver better compression than H.265 while avoiding the complex licensing structure of prior standards.

Like H.265, AV1 uses block‑based prediction, motion compensation, and transforms. However, it adds more intra prediction modes, more flexible transforms, and additional tools like compound prediction and advanced entropy coding. In practice, AV1 usually needs less bitrate than H.265 to reach the same subjective quality, especially at lower bitrates.

Using the same talking‑head example, a 1080p, 30 fps, 10‑minute clip might look similar at around 3 Mbps with AV1. That brings the file size to about 225 MB, which is 25% smaller than the H.265 version and more than 60% smaller than the original H.264 file.

AV1 is increasingly used by major streaming platforms, web browsers, and some new hardware devices, particularly for 4K and HDR content.

Compression efficiency: H.265 vs AV1 in real numbers

How much smaller can AV1 be?

Many lab tests and production experiments show AV1 compressing 15–30% better than H.265 at the same perceived quality, depending on content, encoder, and settings. That margin matters when scaling to millions of views.

Consider three common scenarios:

1. Long‑form streaming series
   A 45‑minute 4K drama episode at 15 Mbps in H.265 might be encoded at around 10–12 Mbps in AV1 for similar quality. That is a bandwidth reduction of roughly 20–30% per viewer.

2. User‑generated 1080p uploads
   A 20‑minute gameplay video encoded with H.265 at 6 Mbps might achieve comparable quality at about 4.5–5 Mbps using AV1. The file shrinks from roughly 900 MB to about 675–750 MB.

3. Archival mezzanine for OTT
   A catalog of 1,000 feature films stored as H.265 at 20 Mbps each might total about 13.5 TB for 2‑hour runtimes. Re‑encoding to AV1 at 15 Mbps could drop that to around 10.1 TB, freeing several terabytes of storage while keeping quality high.

Encoding speed vs compression gains

The compression gains of AV1 come with a cost: encoding complexity. Software encoders like x265 (for H.265) and libaom or SVT‑AV1 (for AV1) expose this trade‑off.

• On the same CPU and preset tuned for quality, AV1 often takes 3–10× more time than H.265 for offline encoding.

• Faster AV1 presets exist, but they reduce the efficiency advantage and may narrow the gap with H.265 to closer to 10–15%.

For a concrete comparison, take a 60‑minute 4K documentary:

• Using x265 at a high‑quality preset, encoding on a single high‑end workstation might take 3 hours.

• Using SVT‑AV1 at a high‑quality preset on the same hardware could take 8–10 hours.

At scale, this difference pushes many teams to keep H.265 for live workflows and reserve AV1 for VOD content where longer encoding times are acceptable.

Hardware support: chips, cameras, and TVs

Where H.265 runs well

H.265 hardware support is mature and broad:

• Smartphones and tablets: Most modern Android and iOS devices include H.265 hardware decode, and many newer flagship SoCs add hardware encode as well.

• TVs and set‑top boxes: 4K smart TVs from major manufacturers, Apple TV 4K, Roku Ultra, and many cable or satellite boxes support H.265 decoding.

• Cameras and drones: Many DSLRs, mirrorless cameras, action cams, and drones record in H.265 for 4K and 6K modes.

A typical example: a mid‑range Android phone released in 2021 can record 4K/60 H.265 video and play back 4K H.265 streams from services like Amazon Prime Video without stressing the CPU.

Where AV1 is catching up

AV1 hardware adoption is newer but accelerating:

• PC GPUs: NVIDIA (RTX 30‑series and newer), AMD (RDNA2 and newer), and Intel (Arc GPUs and some integrated graphics) support AV1 decode, and many support AV1 encode.

• Mobile SoCs: Recent Qualcomm Snapdragon, Samsung Exynos, and MediaTek chips add AV1 decode, often starting with higher‑end models.

• TVs and streaming devices: Some newer smart TVs and devices like the Chromecast with Google TV (latest models) and select Android TV boxes support AV1 decoding.

However, the installed base is mixed. A laptop from 2018 may handle H.265 in hardware but fall back to CPU decoding for AV1, which increases battery drain and may cause dropped frames at 4K.

Practical impact on workflows

For a streaming service targeting everything from low‑end Android phones to smart TVs, the maturity of H.265 hardware means fewer surprises. AV1 requires more careful device detection and fallbacks.

For a creator editing on a recent desktop with a modern GPU, both codecs can be decoded smoothly, but AV1 hardware encoding support may depend on having one of the latest GPU generations.

Browser and platform support

Web playback: av1 vs h265

On the web, av1 vs h265 support is not symmetrical.

• Chrome and Edge: Strong AV1 support for decoding; H.265 support is limited and often relies on OS‑level codecs.

• Firefox: AV1 decoding is supported and enabled on many platforms; H.265 support is more restricted.

• Safari: H.265 is supported via system frameworks on macOS and iOS; AV1 support has been emerging but still trails behind HEVC on Apple platforms.

A concrete example: a 4K video embedded on a news site can be served as AV1 for Chrome and Edge on Windows 11, but the same page may need H.265 or H.264 fallbacks for Safari on older macOS and iOS versions.

Native apps and OTT platforms

• YouTube: Delivers AV1 for many browsers and devices that support it, especially for higher resolutions and premium content. H.265 is not the primary web delivery format.

• Netflix: Uses both H.265 and AV1. AV1 is increasingly used for mobile and some TV platforms with supported hardware decoders.

• Local playback software: Tools like VLC, MPV, and many OS media frameworks support both codecs, but performance depends heavily on hardware acceleration.

When planning a video codec comparison for a web‑first product, AV1 generally aligns better with modern browser support, while H.265 remains stronger in Apple ecosystems and some legacy environments.

Licensing and cost considerations

H.265 licensing model

H.265 is covered by multiple patent pools, including MPEG LA, HEVC Advance, and Velos Media, plus some independent patent holders. Licensing can involve:

• Per‑device fees for hardware manufacturers.

• Per‑subscriber or per‑title fees for some distribution models.

• Regional variations and evolving terms.

For a large streaming platform, H.265 licensing can be a significant line item. For smaller developers or creators using consumer tools, costs are usually bundled into hardware or software licenses, but the legal framework still influences which codecs vendors choose to implement.

AV1 licensing model

AV1 was designed as a royalty‑free codec. Members of the Alliance for Open Media agree to license their essential patents on a royalty‑free basis for AV1 implementations that comply with the AOM patent license.

This does not guarantee that no patent holder outside AOM will ever assert claims, but the intent and structure reduce the risk of the fragmented, multi‑pool model seen with H.265.

For a streaming startup, this matters in two ways:

• Lower predictable licensing overhead.

• Fewer barriers to broad deployment across browsers and open‑source tools.

H.265 vs AV1: side‑by‑side comparison

The following table summarizes key differences.

AspectH.265 (HEVC)AV1OriginITU-T / ISO/IEC standard, successor to H.264Alliance for Open Media, open and royalty‑free designCompression efficiency~50% better than H.264; baseline for UHD streamingTypically 15–30% better than H.265 at similar qualityEncoding complexityLower than AV1; mature encoders like x265Higher; software encodes often 3–10× slower at high qualityHardware decode supportVery broad: phones, TVs, STBs, GPUs since ~2015Growing: newer GPUs, TVs, and high‑end phones since ~2020Hardware encode supportCommon in recent SoCs, cameras, and GPUsAvailable in latest GPUs and some SoCs; still emergingBrowser supportStrong in Safari and some OS‑integrated paths; limited in Chrome/FirefoxStrong in Chrome, Edge, Firefox; growing in other browsersStreaming usageWidely used for 4K broadcast and OTT; strong in Apple ecosystemRapidly growing for web and mobile streaming, especially large platformsLicensingMultiple patent pools; royalties for some usesIntended royalty‑free under AOM licenseBest fit todayLive streaming, broadcast, camera capture, Apple‑heavy audiencesWeb streaming at scale, storage‑sensitive archives, cost‑sensitive platforms

Concrete file size example: H.265 vs AV1

To make the differences tangible, consider a single 2‑hour 4K HDR movie with the following assumptions:

• Resolution: 3840 × 2160

• Frame rate: 24 fps

• HDR10 color

• High‑quality VOD encoding

Approximate bitrates and sizes:

• H.264 baseline: 25 Mbps → about 22.5 GB

• H.265: 15 Mbps → about 13.5 GB

• AV1: 11 Mbps → about 9.9 GB

For one movie, the difference between H.265 and AV1 is around 3.6 GB. For a catalog of 500 such movies, that becomes about 1.8 TB of storage saved. For a global streaming service delivering millions of hours per month, the bandwidth savings compound into real infrastructure cost reductions.

Choosing a codec for streaming vs archiving

Streaming workflows

For streaming, the key factors are device reach, latency, and operational cost.

H.265 advantages for streaming:

• Excellent hardware decode coverage on TVs, set‑top boxes, and many phones.

• Lower CPU usage on older devices, reducing buffering and battery drain.

• Mature live encoding pipelines with predictable performance.

AV1 advantages for streaming:

• Better compression efficiency, which lowers CDN costs and improves quality at constrained bitrates.

• Strong browser support on desktop and Android via Chrome, Edge, and Firefox.

• Royalty‑free licensing, which simplifies global deployment.

A practical pattern is a multi‑codec ladder:

• Use AV1 for capable browsers and newer devices.

• Use H.265 for Apple devices and some TV platforms.

• Keep H.264 as a legacy fallback for older hardware.

This approach takes advantage of AV1’s bandwidth savings without excluding viewers stuck on older or H.265‑only devices.

Archival and long‑term storage

For archiving, the priorities shift to durability, future‑proofing, and total storage footprint.

Reasons to favor AV1 for archives:

• Higher compression efficiency reduces long‑term storage costs.

• Open, royalty‑free design improves the odds of broad future support in tools and platforms.

• Strong alignment with modern web ecosystems, which helps with future redistributions.

Reasons to still use H.265 for some archives:

• Existing camera masters or mezzanine files already in H.265.

• Hardware decoders in current editing and review pipelines optimized for H.265.

• Regulatory or vendor requirements tied to HEVC‑based workflows.

A hybrid strategy is common: keep original camera files in their native format, maintain a high‑quality H.265 mezzanine for current workflows, and gradually introduce AV1 for distribution and cold storage as encoding capacity allows.

Verdict: H.265 vs AV1 for streaming and archiving

For streaming, AV1 is the better long‑term bet, especially for web and mobile delivery where bandwidth costs dominate. However, H.265 remains essential for Apple devices, many smart TVs, and latency‑sensitive live workflows. A dual‑codec strategy that prefers AV1 but falls back to H.265 and H.264 offers the best real‑world coverage.

For archiving, AV1 usually makes more sense. Its stronger compression and royalty‑free status align well with multi‑year or multi‑decade storage plans, especially for large catalogs. H.265 still plays a role when existing infrastructure is deeply tied to HEVC, but new archives gain more long‑term flexibility by standardizing on AV1 where possible.

FAQ: H.265 vs AV1

Is AV1 always better than H.265?

AV1 usually delivers better compression efficiency, often saving 15–30% bitrate at similar quality. However, it is more expensive to encode and has less universal hardware support, especially on older devices. For some live or low‑latency workflows, H.265 may be more practical.

Which codec should be used for YouTube‑style content?

For web‑first, on‑demand content, AV1 is generally a stronger choice because browser support is good and bandwidth savings are significant. Many platforms still keep H.264 and H.265 versions for compatibility, but AV1 is becoming the preferred high‑efficiency option.

Is H.265 still relevant now that AV1 exists?

Yes. H.265 is deeply embedded in cameras, TVs, set‑top boxes, and Apple ecosystems. It handles 4K and HDR efficiently on a huge installed base of hardware. Even as AV1 adoption grows, H.265 remains critical for many production and playback environments.

Do creators need to pay royalties to use H.265 or AV1?

Most individual creators do not pay royalties directly. H.265 licensing costs are usually handled by hardware manufacturers or software vendors. AV1 is designed as royalty‑free under the AOM license. Companies building large‑scale distribution platforms should still review licensing terms with legal counsel.

Which codec is best for long‑term video preservation?

For new archives, AV1 is generally preferable because of its efficiency and royalty‑free nature. It reduces storage requirements and aligns with open, web‑friendly standards. H.265 may still be used where workflows or devices are tightly coupled to HEVC, but AV1 offers stronger long‑term flexibility.