A guide that teach you build a custom version of Chrome / Electron on macOS / Windows / Linux that supports hardware / software HEVC decoding.

enable-chromium-hevc-hardware-decoding

A guide that teach you build a custom version of Chrome / Electron on macOS / Windows / Linux that supports hardware / software HEVC decoding.

English | 简体中文

Get release build?

Click to download

What's the hardware supported HEVC profile?

HEVC Main (Up to 8192x8192 pixels)

HEVC Main 10 (Up to 8192x8192 pixels)

HEVC Main Still Picture (macOS only, Up to 8192x8192 pixels)

HEVC Rext (macOS only, Up to 8192x8192 pixels)

What's the OS requirement?

macOS Big Sur (11.0) and above

Windows 8 and above

Linux + Vaapi (Not tested)

What's the GPU requirement?

Independent GPU

NVIDIA GTX950 and above

AMD RX460 and above

Integrated GPU

Intel HD4400, HD515 and above

AMD Radeon R7, Vega M and above

Apple M1, M1 Pro, M1 Max, M1 Ultra and above

Detail Table

Intel

AMD

NVIDIA

HDR Supports? (Compared with Edge / Safari)

PQ (SDR Screen) PQ (HDR Screen) HLG (SDR Screen) HLG (HDR Screen)
Chromium macOS (EDR) (EDR)
Chromium Windows
Chromium Linux Not Tested Not Tested Not Tested Not Tested
Edge Windows
Safari macOS (EDR) (EDR)

What's the tech diff? (Compared with Edge / Safari)

Windows

Edge uses VDAVideoDecoder to call MediaFoundation (need to install HEVC Video Extension) to finish the HEVC HW decoding which is the same tech behind Movies and TV builtin system app.

Chromium uses D3D11VideoDecoder to call D3D11VA (no need to install anything) to finish the HEVC HW decoding which is the same tech behind video players like VLC.

macOS

Safari and Chromium use the same VideoToolbox to finish the HEVC HW decoding.

How to verify HEVC hardware support is enabled?

  1. Open chrome://gpu, and search Video Acceleration Information, you should see Decode hevc main field and Decode hevc main 10 field (macOS will show Decode hevc main still-picture and Decode hevc range extensions as well) present if hardware decoding is supported (macOS is an exception here, you see this field doesn't means the decode will use hardware, it actually depends on your GPU).
  2. Open chrome://media-internals and play some HEVC video (Test Page) if the decoder is VDAVideoDecoder or D3D11VideoDecoder or VaapiVideoDecoder that means the video is using hardware decoding (macOS is an exception here, if the OS >= Big Sur, and the GPU doesn't support HEVC, VideoToolbox will fallback to software decode which has a better performance compared with FFMPEG, the decoder is VDAVideoDecoder in this case indeed), and if the decoder is FFMpegVideoDecoder that means the video is using software decoding.
  3. Open Activity Monitor on Mac and search VTDecoderXPCService, if the cpu usage larger than 0 when playing video, that means hardware (or software) decoding is being used.
  4. Open Windows Task Manager on Windows and switch to Performance - GPU, if Video Decoding usage larger than 0 when playing video, that means hardware decoding is being used.

Why my GPU support HEVC, but still not able to hardware decode?

OS version is too low

Windows

Please make sure you are using Windows 8 and above, this is because the D3D11VideoDecoder doesn't support Windows 7, and will use VDAVideoDecoder to hardware decoding. while VDAVideoDecoder based on Media Foundation , and Media Foundation start to support HEVC since Windows 10 1709 (which need you to install the HEVC Video Extension).

macOS

Please make sure you are using macOS Big Sur and above, this is because CMVideoFormatDescriptionCreateFromHEVCParameterSets API has compatibility issue on lower macOS.

GPU driver has bug

Some GPU driver may has bug which will cause D3D11VideoDecoder forbidden to use. in this case, you need to upgrade your GPU driver and try again. See reference

GPU hardware has bug

Some GPU hardware may has bug which will cause D3D11VideoDecoder forbidden to use. in this case, we can't do anything else but to use the FFMPEG software decode. See reference

Will HEVC decoding be enabled in Chrome by default in the future?

Chrome 104 will integrate HEVC hw support for ChromeOS, Mac and Windows, disabled by default, and you can enable it by passing --enable-features=PlatformHEVCDecoderSupport when opening. it should be enabled by default in the future version when stable. (only platform decoder that provided by the OS will be supported in chrome, thus this will be optional depends on the GPU and OS support)

How to Build?

  1. Follow the official build doc to prepare the build environment then fetch the source code from main branch (HEVC HW codes has been merged).
  2. (Optional) To enable HEVC software decoding: switch to src/third_party/ffmpeg dir, then execute git am /path/to/add-hevc-ffmpeg-decoder-parser.patch.
  3. (Optional) To enable other HEVC profiles (non main / main 10 profiles): switch to src dir, then execute git am /path/to/remove-main-main10-profile-limit.patch.
  4. (Optional) To default enable hardware decode: switch to src dir, then execute git am /path/to/enable-hevc-hardware-decoding-by-default.patch.
  5. (Optional) To integrate Widevine CDM to support EME API (like Netflix): switch to src dir, then execute cp -R /path/to/widevine/* third_party/widevine/cdm (Windows: xcopy /path/to/widevine third_party\widevine\cdm /E/H).
  6. If you are using Mac + want to build x64 arch (target_cpu to x86 , arm64 , arm also available) + want to add CDM support, then run gn gen out/Release64 --args="is_component_build = false is_official_build = true is_debug = false ffmpeg_branding = \"Chrome\" target_cpu = \"x64\" proprietary_codecs = true media_use_ffmpeg = true enable_widevine = true bundle_widevine_cdm = true enable_platform_hevc = true enable_hevc_parser_and_hw_decoder = true", if you are using Windows, you need to add enable_media_foundation_widevine_cdm = true as well, if you are using Windows and want to build arm64 arch, then need to change bundle_widevine_cdm to false, an if you are using Linux and don't want to build x64, then need to change enable_widevine to false, bundle_widevine_cdm to false.
  7. Run autoninja -C out/Release64 chrome to start the build.
  8. Run ./out/Release64/Chromium.app/Contents/MacOS/Chromium --args --enable-features=PlatformHEVCDecoderSupport to open chromium if you are using macOS.
  9. Create a desktop shortcut and passing the args like C:\Users\Admin\Desktop\Chromium\chrome.exe --enable-features=PlatformHEVCDecoderSupport then double click the desktop shortcut to open chromium if you are using Windows.

How to integrate this into Chromium based project like Electron?

If Electron = 20 (Chromium 104), then the HEVC hw decoding feature for Mac and Windows should have already been integrated, and you can use app.commandLine.appendSwitch('enable-features', 'PlatformHEVCDecoderSupport') to enable HEVC hw decoding. to add HEVC ffmpeg sw decoding, the method should be the same with Chromium guide above.

If Electron < 20, please follow the CL in Trace Crbug to manually integrate HEVC features, pull request of the patch code wecome.

Change Log

2022-05-25 Update Chrome 104 support status, and Electron 20 enable method

2022-05-24 Update Patch to 104.0.5080.1

2022-05-23 Add CDM compile guide, and update Patch to 104.0.5077.1

2022-05-17 Update detail of tech implement and guide to integrate into electron

2022-05-14 Update Patch to 104.0.5061.1

2022-05-13 Add HEVC Test page

2022-05-10 Update README, add more special detail of the hardware support and GPU models

2022-05-05 Add support for MSP & Rext on macOS, and fix the issue that some HDR & Rec.709 Main10 video can't be hw decoded on Windows

2022-04-27 Replace to git am patch

2022-04-24 Support chinese README

2022-04-21 Add Crbug trace

2022-04-20 Modify README

2022-04-19 Initial commit

Trace Crbug

Windows
macOS

License

MIT

Comments
  • 无法播放hevc mkv

    无法播放hevc mkv

    感谢

    浏览器支持HEVC是一个划时代的进步。感谢!

    代码

    <body bgcolor=#000000>
    <p align=center>
    <video controls="controls" autoplay>
    <source src="TearsOfSteel_720p_h265.mkv" type="video/mp4">
    </video>
    </p>
    </body>
    

    现象

    黑屏。换H.264的mkv文件,可以正常播放。

    平台

    1. Win11最新版
    2. Chrome最新版

    问题

    1. 现在用--enable-features=PlatformHEVCDecoderSupport能不能播放hevc mkv?
    2. 如果不能,那么什么时候能?
  • Linux 所有 hevc 视频无法硬解

    Linux 所有 hevc 视频无法硬解

    测试页的视频都可以软解播放,但是 CPU 占用很高,decoder 占用始终为 0。 测试过使用如下参数:--use-gl=desktop --enable-features=VaapiVideoDecoder --disable-features=UseChromeOSDirectVideoDecoder 加和不加都不能硬解。 显卡:NVIDIA 1660s 系统:Arch Linux 最新 kernel 5.17.7 驱动:nvidia 510.68.02-3 libva-vdpau-driver-vp9-git r57.509d3b2-4

  • Support HEVC with Alpha

    Support HEVC with Alpha

    一直以来,H.264 不具备 Alpha 通道的能力,在网页中有很多场景需要半透明的视频,例如:类似于剪映的视频剪辑工具。

    过去,我们只能选择 VP8/VP9 编码,但由于其兼容性不佳,极大的制约了 Alpha 视频的应用。

    我测试了最新的 Chrome canary(Mac),似乎还不支持带有 Alpha 通道 HEVC 视频,Safari 中可以播放:

    <video autoplay controls src="https://rotato.netlify.app/alpha-demo/movie-hevc.mov"></video>
    
    data:text/html;charset=UTF-8,<body style="background: pink;"><video autoplay controls src="https://rotato.netlify.app/alpha-demo/movie-hevc.mov"></video>
    
  • intel 核显 Iris Xe 在 Canary 107  中无法正确回放 HDR 内容

    intel 核显 Iris Xe 在 Canary 107 中无法正确回放 HDR 内容

    使用 Chrome 的时候偶然遇到播放HEVC HDR内容时,浏览器窗口闪烁的问题,由于我对 Chrome 和 Chromium 当前的开发情况不是很熟悉,遂来此向作者询问相关问题。

    本 issue 针对 Chrome Beta/Dev/Canary 及 Chromium latest build ,本仓库 Release latest 共五个版本进行测试。


    测试1

    版本:版本 107.0.5286.2(正式版本)dev (64 位)

    启动参数:无

    Video Acceleration Information: 无HEVC支持 image

    实际测试:

    • 测试页无法正确播放,表现为仅音频模式
    • bilibili强制使用HEVC,回报使用DashPlayer + WasmPlayer

    启动参数:--enable-features=PlatformHEVCDecoderSupport

    Video Acceleration Information: HEVC硬解正确支持 image

    实际测试:

    • 测试页部分正确播放,HDR内容(HLG,PQ)表现为整个浏览器窗口闪烁,视频窗口闪过紫色后变黑。
    • bilibili强制使用HEVC,回报使用DashPlayer + WasmPlayer

    测试2

    版本:版本 107.0.5293.0(正式版本)canary (64 位)

    有无启动参数表现均与测试一相同

    测试3

    版本:版本 107.0.5294.0(开发者内部版本) (64 位)

    启动参数:无

    Video Acceleration Information: 无HEVC支持 image

    实际测试:

    • 测试页无法正确播放,也不可仅播放音频 image
    • bilibil无法加载播放器?

    启动参数:--enable-features=PlatformHEVCDecoderSupport

    Video Acceleration Information: 无HEVC支持 image

    实际测试同无启动参数

    测试4

    版本:版本 106.0.5211.0(正式版本) (64 位) 本仓库 release 的 最新版

    启动参数:无

    Video Acceleration Information: HEVC硬解正确支持 image

    实际测试:

    • 测试页部分正确播放,HDR内容(HLG,PQ)表现为整个浏览器窗口闪烁,视频窗口闪过紫色后变黑。
    • bilibili强制使用HEVC,回报使用DashPlayer,任务管理器回报 Video Decode 不为 0, Video Decode 1 为0

    启动参数:--enable-features=PlatformHEVCDecoderSupport

    Video Acceleration Information: HEVC硬解正确支持 image

    实际测试:

    • 测试页部分正确播放,HDR内容(HLG,PQ)表现为整个浏览器窗口闪烁,视频窗口闪过紫色后变黑。
    • bilibili强制使用HEVC,回报使用DashPlayer,任务管理器回报 Video Decode 为 0,Video Decode 1 不为0

    由于我正在使用 Chrome Beta 编写此 issue,故该通道的表现将在稍后补充。目前来看 Chrome Beta 的表现与测试4的表现较为一致

    另外我留意到了这个提交 https://chromium-review.googlesource.com/c/chromium/src/+/3833477 想询问一下这项提交是否与HEVC硬解支持相关


    系统基础信息:

    Windows 11 Professional Insider Preview 
    Build 25197.rs_prerelease.220902-1559
    

    CPU&GPU:

    12th Gen Intel(R) Core(TM) i5-12500H (16 CPUs)
    Intel(R) Iris(R) Xe Graphics (驱动程序版本:30.0.101.1368)
    Monitor Capabilities: HDR Supported (BT2020RGB Eotf2084Supported )
    
  • 没有HEVC,只有VP9的8K呢

    没有HEVC,只有VP9的8K呢

    你好, 我编译了Chrome,版本 110.0.5439.0(正式版本) (64 位),显示 Video Acceleration Information Decoding Decode h264 baseline 64x64 to 4096x4096 pixels Decode h264 main 64x64 to 4096x4096 pixels Decode h264 high 64x64 to 4096x4096 pixels Decode vp9 profile0 64x64 to 8192x8192 pixels Decode vp9 profile2 64x64 to 8192x8192 pixels Encoding Encode h264 baseline 32x32 to 1920x1088 pixels, and/or 30.000 fps Encode h264 main 32x32 to 1920x1088 pixels, and/or 30.000 fps Encode h264 high 32x32 to 1920x1088 pixels, and/or 30.000 fps

    怎么没有HEVC的解码呢?我试了N卡和A卡,都是没有,官方装的107就有,应该不是显卡或者驱动有啥问题了。 是不是编译时还需要修改什么?我只合入了开启Windows、Mac默认的那个patch,就是修改了一句话拿个patch。

  • Chrome 107是否会默认开启Webcodecs的hevc支持

    Chrome 107是否会默认开启Webcodecs的hevc支持

    背景: 目前公司用的http-flv,看到Chrome Canary终于支持hevc,所以想撸一个基于Webcodecs转码的flv播放器。

    困境: 但目前Chrome的Video Element硬解是需要改启动参数,对终端用户实在不是很友好。

    1. 请问下Chrome 107是否会默认开启Webcodecs的hevc支持
    2. Video Element的硬解的默认支持是否有计划

    以上,十分感谢!

  • HLG tone-mapping相关问题

    HLG tone-mapping相关问题

    Windows 11 22H2 22621.675 RTX 2060 517.48 Chrome dev 108.0.5359.10

    问题:HDR下打开HLG视频的颜色 与 SDR下打开HLG视频随后切换到HDR显示 不同 测试视频:https://lf-tk-sg.ibytedtos.com/obj/tcs-client-sg/resources/hevc_4k25P_main10_2.mp4 问题图片:(截图存在过曝现象,但还是可以看出颜色不同) HDR下打开该视频: image SDR下打开该视频,然后开启HDR显示: image 第二个看起来像蒙了一层雾 另外edge 108.0.1438.1 dev没有这个问题,两种情况都与第一张图片的效果一致

  • HEVC硬解在双显卡笔记本上始终使用集显

    HEVC硬解在双显卡笔记本上始终使用集显

    不知道是不是合适在这里问,先尝试一下。 我的笔记本是ThinkPad P1 Gen3,是Quadro T1000独显直出和Intel i7-10750H的集显,Win10 21H2平台,Chrome 106.0.5249.62 (Official Build) (64-bit) (cohort: Stable Installs & Version Pins) Chrome打开了flag,确认HEVC是走硬解的。 播放 https://www.bilibili.com/video/BV11e4y1r7zM 这个视频4K版本,能看到编码用的也是hev1 image 使用外接显示器在Chrome里全屏播放,发现此时解码是用集显在解,图里Video Decode达到80%,同时也有30%左右的3D消耗 image 而独显只有3D这一项的消耗,其余都是0 image


    把视频下载下来用PotPlayer播放: 放外接显示器上,能看到解码全部用了独显,PotPlayer的设备也是独显 image image image 换到笔记本内置显示器上,能看到解码全走了集显,PotPlayer的设备也是集显 image image image


    所以应该是可以在外接显示器上播放的时候,使用独显进行解码的,所以比较奇怪Chrome的行为。

  • HEVC hardware decode support not surfaced for WebRTC media streams?

    HEVC hardware decode support not surfaced for WebRTC media streams?

    Running Chrome Canary 105 with the --enable-feature=PlatformHEVCDecoderSupport commandline parameter, I still don't see the HEVC decode capability being announced by WebRTC: image

    Is the HEVC decode support limited to MSE APIs, or will it make it into WebRTC media streams as well?

    Thanks!

  • Rebase

    Rebase

    @StaZhu Hi its alex again. Can you rebase your patches for the latest ffmpeg. They did a commit here that made it where the patches wont work anymore because they are off by like a line. > https://chromium.googlesource.com/chromium/third_party/ffmpeg.git/+/0564e9eec5a741b52804f06c56446cfee582f5cb

  • win11 更新到版本 107.0.5303.0(正式版本)canary (64 位),chrome://gpu/页面没有hevc支持

    win11 更新到版本 107.0.5303.0(正式版本)canary (64 位),chrome://gpu/页面没有hevc支持

    看到readme里面说107.0.5300.0 后会默认支持hevc不用加enable参数,下载了个canary试了一下,发现chrome://gpu/里面没有默认支持hevc,实测也是不支持,同一台设备之前104版本加上enable后,chrome://gpu/可以看到hevc,并且实测也是支持的

  • VulkanVideo HEVC

    VulkanVideo HEVC

    https://www.khronos.org/blog/khronos-finalizes-vulkan-video-extensions-for-accelerated-h.264-and-h.265-decode 未来也许可以使用 VulkanVideo 作为 Chromium 的跨平台、跨供应商的硬解实现? 优点:

    1. 目前 Chromium 的 HEVC 硬解实现有 D3D11VA 、MediaCodec 、VideoToolbox 、VAAPI,使用 VulkanVideo 可以实现通用的硬解。
    2. Chromium Windows 目前开启 chrome://flags/#enable-vulkan 会导致 D3D11VA 硬解异常,--use-angle=vulkan 会彻底破坏硬解。
    3. Chromium Linux 目前使用 VAAPI ,NVIDIA GPU 需要安装额外的包,部分发行版的驱动软件包不支持 VAAPI 硬解解码,而 VulkanVideo 只要存在 Vulkan 驱动程序就可以使用。
    4. Chromium Windows NVIDIA GPU可能实现 HEVC Rext 硬解解码
    5. Linux ANI 三家的 Vulkan 驱动程序都已实现 VulkanVideo。

    缺点:

    1. VulkanVideo 作为最近发布的 Vulkan 扩展,尚未得到广泛实施,MoltenVK 目前无计划支持,Qualcomm 目前仅有 Adreno700 系列 GPU 提供 Vulkan 1.3,MediaTek 目前仅有天玑 9200 支持 Vulkan 1.3,且暂不确定 ARM/Qualcomm 是否会为其驱动实现 VulkanVideo。因此需要为 Android、macOS 提供基于 MediaCodec、VideoToolbox 的回退实现。
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Morse decoder The project's idea is very simple, the Arduino program has the responsibility to upload the sensor's data to the USB serial port.

Mar 12, 2022
⛵ The missing small and fast image decoding library for humans (not for machines).
⛵ The missing small and fast image decoding library for humans (not for machines).

Squirrel Abstract Image Library The missing fast and easy-to-use image decoding library for humans (not for machines). Target Audience • Features • Im

Dec 19, 2022
Text utilities, including beam search decoding, tokenizing, and more, built for use in Flashlight.

Flashlight Text: Fast, Lightweight Utilities for Text Quickstart | Installation | Python Documentation | Citing Flashlight Text is a fast, minimal lib

Dec 15, 2022