H.264 vs H.265 (HEVC) — The Video Codec Showdown

The 50% Promise

When H.265 (HEVC — High Efficiency Video Coding) launched in 2013, it promised 50% better compression than H.264 at the same visual quality. Ten years later, that promise has mostly delivered — but H.264 still dominates the real world.

Why? Because codec efficiency isn't the only thing that matters.

The Numbers

Feature	H.264 (AVC)	H.265 (HEVC)
Year released	2003	2013
Compression efficiency	Baseline	25-50% better
1080p file size (1 min)	15-25 MB	8-15 MB
4K file size (1 min)	60-100 MB	30-60 MB
Encoding speed	Fast	2-5x slower
Hardware decoding	Every device made since 2010	Most devices since 2015
Browser support	Universal	~85% (no Firefox default)
Licensing	$0.20/unit (capped)	Complex, multi-pool
Streaming adoption	Netflix, YouTube, Twitch	Netflix, Apple TV+
Camera support	Every camera	iPhones, newer cameras

Where H.264 Wins

Compatibility

H.264 plays on literally everything — every phone, every browser, every smart TV, every media player, every streaming box made in the last 15 years. No codec in history has achieved wider compatibility. When you need "just works," H.264 is the answer.

Encoding Speed

H.264 encodes 2-5x faster than H.265 at comparable quality. For live streaming (Twitch, YouTube Live, Zoom calls), this speed advantage is critical — you need real-time encoding without dropping frames.

Editing Compatibility

Every video editor handles H.264 natively. H.265 support in editing software has improved dramatically, but some older or lighter editors still struggle with it, especially for scrubbing and preview.

Licensing Simplicity

H.264's licensing (via MPEG LA) is straightforward and capped. H.265's licensing involves three separate patent pools (MPEG LA, HEVC Advance, Velos Media) with different terms. This licensing mess is one reason many companies preferred to develop AV1 instead.

Where H.265 Wins

File Size

For storage and bandwidth, H.265's efficiency is substantial:

Content	H.264 Size	H.265 Size	Savings
1-hour 1080p movie	4-6 GB	2-3.5 GB	~40%
1-hour 4K movie	15-25 GB	8-14 GB	~45%
1-minute iPhone video	120 MB	60 MB	~50%
Security cam (24 hours)	30 GB	15 GB	~50%

If you're storing a lot of video (security cameras, personal archive, media server), H.265 cuts your storage bill in half.

4K and Beyond

H.265 was designed for 4K and 8K content. H.264 technically supports 4K, but the bitrate requirements make it impractical — 4K H.264 files are enormous. If you're working with 4K content, H.265 is the practical choice.

iPhone Recording

Since iPhone 7 (2016), Apple's default camera format is H.265 in a MOV container ("High Efficiency" mode). This is why iPhone videos are relatively compact for their quality. You can switch to H.264 in Settings → Camera → Formats → Most Compatible, but files will be roughly twice as large.

The Decision Framework

Scenario	Codec	Why
Upload to YouTube/Twitch	H.264	They re-encode anyway; faster upload
Share via email/messaging	H.265	Smaller files, most phones decode it
Store video archive	H.265	50% storage savings
Live streaming	H.264	Real-time encoding needs speed
Web element	H.264	Universal browser support
Security cameras	H.265	Months of footage, storage matters
Edit in Premiere/DaVinci	Either	Both work; H.264 scrubs faster
Maximum future-proofing	AV1	If you can afford the encoding time

What About AV1?

AV1 is the next generation — 30% more efficient than H.265, royalty-free (unlike H.265), and backed by Google, Apple, Netflix, Amazon, and Microsoft. But encoding is 10-50x slower than H.264, and hardware decoding is only now becoming widespread in 2026.

AV1 will likely succeed H.265, but H.264 will outlive them all through sheer inertia.

Convert between video formats using MyPDF's Video Converter.

Related Tools

• Convert Video — Convert between codecs and containers
• Compress Video — Reduce file size with efficient compression
• MOV to MP4 — Convert iPhone H.265 MOV to universal MP4
• Video Trim — Cut clips before re-encoding