What is HEVC - How HEVC/H.265 Differs from H.264 and VP9

Why Use HEVC/H.265 for 4K/8K Videos Instead of H.264

H.264/MPEG-4 AVC, the predecessor of HEVC, is famous for compressing huge amount of information of a video for steaming over YouTube, Netflix, Vimeo, etc. Those videos from the video streaming services are generally in 1080p (2.1 megapixels) or 720p (0.9 megapixels). But for the 4k video with 8.3 megapixels, it seems to be impossible to store or transmit the UHD video if compressed with H.264. Due to the less efficiency in video compression with H.264, coding distortion situations are likely to happen in border areas.

HEVC/H.265 codec manages to offer the same level of video quality but half the size of video compared to its successor H.264/MPEG-4 AVC, which means these 4K contents need only half the data to stream over YouTube. The size of code unit is determined by the regional information. Plus, the quality of video encoded by HEVC is substantially enhanced under the same bit rate. That That's way HEVC is widely used to compress video with 4K or even 8K resolution.

HEVC/H.265 VS H.264, AV1 or Other Video Codecs

1. HEVC vs H.264: Since HEVC or H.265 is the successor to avc H.264, there is bound to be a comparison between HEVC/H.265 and H.264. So how does HEVC or H.265 advantages over H.264? Still here, just scroll down for the answer.

Approved date: The first version of H.264 was standardized in 2003 while HEVC was formally ratified as a standard 10 years later.

Size: H.265/HEVC reduces the file size by about 39-44% at the same quality compared to H.264. That means, If you download HEVC MKV movie in 4K with 2hr in length, you will get around around 1.25-1.5GB compared with the same movie with 3GB encoded by H264.

Bit rate: With the use of HEVC/H.265 codec, bit rate savings are reported to be 50% or more compared to H.264, which is proven at the 2012 Mobile World Congress. Meanwhile, the H.264 reportedly showed almost 50% bit rate reduction compared to MPEG-2 Part 2.

Availability: H.264 is available to deliver HD sources (1080p/720p) for broadcast and online. While better than H.264, X265, H.265/HEVC is likely to implement Ultra HD, 2k, 4k and even 8K for broadcast and online.

2. HEVC vs AV1: AOMedia's AV1 is backed by the world's leading companies incl. Google, Apple, Intel, etc. The open source yet royalty-free codec is supposed to be the biggest rival of HEVC. Despite HEVC is reported to deliver a 50% gain in compression efficiency over H.264 and VP8 standards while maintaining the same video quality, AV1 performs well in compression and is proven to save 51% when compared to X264 by Facebook.

Bit rate: HEVC/H.265 provides a bit rate saves of over 43% compared to H.264. While AV1 achieved 50.3% higher data compression than x264 main profile. From this point of view, AV1 is roughly on par with HEVC. While at the same time, AV1 is a free codec, unencumbered by license fees, which is a strong motivation for advancing an alternative to HEVC.

Quality: HEVC is delivering on its promise of higher visual quality pictures at the same bitrates. While the AV1 has equal quality as compared to HEVC.

Browser compatibility: HEVC playback is supported in DivX while VP9 has the advantages unsurprisingly, with support in Google Chrome and Firefox. Now AV1 plays in up to 36% of all browsers, with more coming soon. In 2018, Microsoft announced AV1 playback on Windows 10 device. But hardware support for AV1 encode and decode is scheduled to appear till 2022.

Must-Have HEVC/H.265 Codec and Player

So you want to watch the 4K HEVC encoded video on your UHD TV or share a 4K video on Facebook? Then you need to download HEVC/H.265 codec pack to fit the bill. This is because HEVC codec works as the software to decode or encode HEVC video, which helps to create and play 4K/8K videos on your computer or devices without any incompatibility issues. Below are 3 top HEVC/H.265 codec/player to meet your needs.

• x265 - An open-source video encoder for HEVC/H.265. It claims to offer the highest encoding speed and possible quality at any given bit rate.
• DivX - The first of its kind video software that enables users to create, stream and play videos. You can convert and play videos up to 4k in the formats like DivX, MKV, HEVC and MP4 without any problem.
• 5KPlayer - It is embedded with 370+ input and output codecs, including the breakthrough H.265/HEVC video codec, the HEVC player automatically enables hardware decoder and doesn't need any external codec to play 4K/8K video files encoded with HEVC smoothly on both Windows PC (Windows 10) and Mac without degrading the video quality.
• VLC Player - This media player updated to the version 2.2.0 on Feb 27, 2015, merging the support for x265 to provide a robust support for HEVC/H.265 playback.

All-in-one H.265/HEVC Decoder, Encoder, Converter and Player

For video buffs, what matters them most is to play back HEVC videos or share UHD videos to online video site with no issue. So here we highly recommend you to use MacX Video Converter Pro. By adding the support of H.265 codec, the HEVC/H.265 video converter works as a HEVC decoder that downsizes H.265/HEVC videos without damaging the quality while freeing up space and outputs the UHD videos in a supported format of your choice, say MP4, MOV, AVI, WMV, MKV, etc.

Besides, it serves as a H.265 encoder that compresses video and encodes common video files to high quality H265 video for better visual effects with 50% compression. Below is the guide on how to convert SD/HD videos (AVCHD, MKV, MTS, M2TS, MP4, AVI, MOD, WMV, MPEG4, H.264) to HEVC/H.265 video on Mac OS.

Step 1: Free download HEVC video converter on Mac, install and run it. Hit the "+" button to load the video you want to convert. Or you can even download 4K video encoded with HEVC video from YouTube, Facebook, or other 1000+ online sites by hitting the "YouTube" button on the top corner of the interface.

Tips: this HEVC video converter also works on Windows, including Windows 10, you can free download the windows version here.

Step 2: Go to the output profile -> PC general video -> HEVC video. You can also decode HEVC video to H.264 MP4, AVI, MOV, WMV, etc from the output profile.

Step 3: Tab the button "OK" and hit "RUN" button to start encode video to H265 or convert H265 to H264 on your PC or Mac.

External sources:

What is HEVC: HEVC is known as H.265 that dramastically improves quality at the same level of bitrate or offers up to 50% better data compression at the same level of quality compared to AVC.