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What You Need to Know About HEVC Video in macOS High Sierra and iOS 11
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I wouldn’t do it unless your h.264 files are at a very high quality or you have the lossless source files. They are different lossy formats and you would certainly amplify certain artifacts.
Obviously dedicated video decode hardware is the best as I already indicated, but the question is whether GPGPU accelerated decode is better than CPU decode? nVidia took the effort to implement shader-based GPGPU decode + partial reuse of h.264 decoding hardware to enable hybrid decoding of h.265 on Kepler and Maxwell v1 so presumably there is an advantage over CPU decode. Anandtech certainly believes so.
https://www.anandtech.com/show/8526/nvidia-geforce-gtx-980-review/5
Intel also implements hybrid decoding with shader-based GPGPU decode + partial reuse of h.264 decoding hardware in Broadwell which is supposed to be better than just CPU decode.
https://www.anandtech.com/show/8355/intel-broadwell-architecture-preview/3
Since hybrid GPGPU-assisted decode is supposed to be better than CPU decode, my original question was whether Apple is implementing it in High Sierra for non-Skylake/Kaby Lake computers? Hybrid decoding is available in Windows on Haswell/Broadwell IGPs and Kepler/Maxwell v1 GPUs so it'd be great if macOS supported hybrid decoding on that hardware too.
True -
VLC, IINA, etc.
iTtunes w/ High Sierra on my 2012 mac mini will play HEVC with sound but no picture.
Apple don’t need to support V9 for it to play on their devices. Apple don’t support MKV but that plays back on my iPad, iPhone & Mac because of the software company making their apps to cater for it.
Correction, got it fixed, plays HEVC fine now. Great info here -
https://forums.macrumors.com/threads/hevc-support.2048628/page-10
Apple is killing me here. I recently set my camera/video settings to efficient so I can record in HVEC thinking this was a smart move. Little did I know that Apple restricted playback on other devices like older Macs so when you launch Photos the video isn't compatible.
I ended up using quicktime to convert the video and I had to revert my settings for my phone to avoid repeat problems.
I ended up using quicktime to convert the video and I had to revert my settings for my phone to avoid repeat problems.
With the arrival of iOS 11 and macOS High Sierra, Apple is supporting a new video format called HEVC, which replaces the previous standard most commonly used on Mac and iOS devices, namely H.264 / AVC. So why has Apple adopted the HEVC format, and what difference will it make to the end user?
What is HEVC?
High Efficiency Video Coding (HEVC), also known as H.265, is a next-generation video compression standard developed by a group of encoding experts called the Joint Collaborative Team on Video Coding. The HEVC video format has been in existence since around 2013, and HEIF is the still-image version of the standard that both iOS 11 and macOS High Sierra also support. (You can learn more about HEIF here.)
Benefits of HEVC
Apple's decision to adopt HEVC basically means two things - higher quality video and better compression rates. The HEVC standard enables a video to be compressed into a file that is about half the size (or half the bit rate) of H.264 / AVC. To put that another way, a HEVC video file offers significantly better visual quality than an AVC file of equivalent size or bit rate. While results vary depending on the type of content and the encoder settings, videos encoded in HEVC typically exhibit fewer compression artifacts and offer smoother playback than videos encoded using AVC.
According to Apple, HEVC can compress 4K video files to up to 40 percent smaller file sizes than AVC without losing quality, which means users who upgrade their devices to iOS 11 and macOS High Sierra will be able to take the same high-quality videos without using up as much storage space. At the same time, transferring high-resolution video files between devices and over networks will require significantly less bandwidth, a key advance considering new 4K iTunes content launched for the new Apple TV 4K.
Compatibility and Support
To capture and encode video in the HEVC format, iOS devices need to have at least an A10 Fusion processor, so owners of iPhone 7 or later and 2017 iPad Pro are fully able to take advantage of the standard. To check if your device's camera is capturing video in HEVC, go to Settings -> Camera -> Formats, and ensure the "High Efficiency" option is selected.
All iOS devices running iOS 11 and all Macs on High Sierra will support HEVC playback, with encoding/decoding hardware acceleration on newer iOS devices and the latest 2017 Macs offering faster performance combined with less battery drain. Readers interested in further transcoding details are advised to watch Apple's dedicated HEVC codec video presentation.
Article Link: What You Need to Know About HEVC Video in macOS High Sierra and iOS 11
[doublepost=1521498038][/doublepost]Hello.
With the arrival of iOS 11 and macOS High Sierra, Apple is supporting a new video format called HEVC, which replaces the previous standard most commonly used on Mac and iOS devices, namely H.264 / AVC. So why has Apple adopted the HEVC format, and what difference will it make to the end user?
What is HEVC?
High Efficiency Video Coding (HEVC), also known as H.265, is a next-generation video compression standard developed by a group of encoding experts called the Joint Collaborative Team on Video Coding. The HEVC video format has been in existence since around 2013, and HEIF is the still-image version of the standard that both iOS 11 and macOS High Sierra also support. (You can learn more about HEIF here.)
Benefits of HEVC
Apple's decision to adopt HEVC basically means two things - higher quality video and better compression rates. The HEVC standard enables a video to be compressed into a file that is about half the size (or half the bit rate) of H.264 / AVC. To put that another way, a HEVC video file offers significantly better visual quality than an AVC file of equivalent size or bit rate. While results vary depending on the type of content and the encoder settings, videos encoded in HEVC typically exhibit fewer compression artifacts and offer smoother playback than videos encoded using AVC.
According to Apple, HEVC can compress 4K video files to up to 40 percent smaller file sizes than AVC without losing quality, which means users who upgrade their devices to iOS 11 and macOS High Sierra will be able to take the same high-quality videos without using up as much storage space. At the same time, transferring high-resolution video files between devices and over networks will require significantly less bandwidth, a key advance considering new 4K iTunes content launched for the new Apple TV 4K.
Compatibility and Support
To capture and encode video in the HEVC format, iOS devices need to have at least an A10 Fusion processor, so owners of iPhone 7 or later and 2017 iPad Pro are fully able to take advantage of the standard. To check if your device's camera is capturing video in HEVC, go to Settings -> Camera -> Formats, and ensure the "High Efficiency" option is selected.
All iOS devices running iOS 11 and all Macs on High Sierra will support HEVC playback, with encoding/decoding hardware acceleration on newer iOS devices and the latest 2017 Macs offering faster performance combined with less battery drain. Readers interested in further transcoding details are advised to watch Apple's dedicated HEVC codec video presentation.
Article Link: What You Need to Know About HEVC Video in macOS High Sierra and iOS 11
So can someone explain to me, if iPhone X records in HEVC, why does it show up as .MOV when I transfer from my phone to my iMac PHOTOS app, and why when I export that video file to a folder it shows up as a .M4V file !
Thanks.
I guess it doesnt matter, mov is just a container. try renaming the mov file to .m4v, it should still play just fine.
HEVC is the video coding format and .mov and .mp4 denotes the file container format.
You have to chose HEVC settings in the option. I believe by default it isn't selected.