Nvdec vs cuvid Edited April 30, 2019 by KarlDag hi all im trying to set up madVR and LAV filters etc but i dont know which decoder i should use. These hardware decoders are: DXVA2 (copy-back) NVIDIA CUVID Intel QuickSync More universal decoder is DXVA2 (copy-back) $ ffmpeg -c:v h264_cuvid -hwaccel nvdec -resize 1280x720 -i INPUT -vcodec h264_nvenc -b:v 5M -acodec copy OUTPUT Check all available options for encoder h264_nvenc Feb 10, 2024 · Which decoder is better?In general, NVDEC interface in Avidemux provides support for more codecs than DXVA2, but with your Pascal 3rd gen NVDEC card, the benefit is minimal (just MPEG-1 and -2 edit: and VC-1). js. 264、HEVC等格式。 FFmpeg中的CUVID和NVDEC硬件加速器虽然调用底层相同的ffnvcodec，但CUVID作为外部解码器，而NVDEC内置于解码器中。 I'm trying to copy the NV12 NVDEC decoded buffer directly into an NV12 d3d11 texture. Right now, I am at the stage where I am just trying to determine if the binaries that I'm even compiling are the ones I want. zapod. Last known version to work OK is 3. It appears that most of the time is spent in avcodec_send_packet. So I'm trying to get hardware accelerated encoding working (just nvidia for now), and boy oh boy is this an adventure. You means cuvidParseVideoData is deprecated also? I want express is cuvidParseVideoData did not output correctly video sequence. NVDEC (formerly known as NVCUVID[1]) is a feature in Nvidia graphics cards that performs video decoding, offloading this compute-intensive task from the CPU. In the binaries that I currently have, when I enumerate the available h. 20, but now the NVENC Support Matrix states that there is no HEVC B Frame support on the TU117. Nov 16, 2018 · In order to prefer usage of -hwaccel nvdec vs -hwaccel cuvid we have to make used surfaces configurable and make memory allocation similar to -hwaccel cuvid, and of course the issue with -bf 3 on ffmpeg-git and ffmpeg-4. NVIDIA Video Decoder (NVCUVID) For NVIDIA Video Decoder (NVCUVID) use the NVIDIA Video Codec SDK. Accelerated Video Decoding with NVDEC This tutorial shows how to use Nvidia’s hardware video decoding (NVDEC)† with TorchAudio. ts With 3. Notice This document is provided for information purposes only and shall not be regarded as a warranty of a certain functionality, condition, or quality of a product. "NVIDIA CUVID (old)"). Could you please follow the suggestions/questions from @Happy2Play ? Note that FFmpeg offers both NVDEC and CUVID hwaccels. May 15, 2020 · Hi all, new dedicated thread. The behavior likely desired is to invoke NVENC or NVDEC which are both faster and dramatically more power efficient for both video encoding and video decoding. 264 10bit contents and when the ffmpeg binary provided by user is lacking of certain codec_cuvid decoder or cuda hwaccel type and related filters. so any 2021 advice? :) also, (IF) DXVA2 is better, which one should i use? native or copy back? Mar 10, 2022 · NVIDIA CUDA or NVENC-based acceleration is widely used for 4K video transcoding/playback programs or tools like FFmpeg, Final Cut Pro, Macxvideo AI, and other multimedia software to speed up performance. Nov 14, 2018 · Out of curiosity I just ran some tests to get an idea of the difference in quality, if any, between yadif, yadif_cuda, cuvid deint and mcdeint. Thanks! In the Video Codec SDK 9. NVIDIA provides software API and libraries for programming NVDEC. 3. The newest native/copy-back such as nvdec/copy, d3d11va/copy, vaapi/copy, and so on should be safe Apr 6, 2022 · NVDEC H. This guide is to help you compile the latest ffmpeg with Nvidia CUDA and so much external library like libzimg, libplacebo in your local computer. … Thanks for the update, helps a lot! :) I have two questions left: Is it correct that the GeForce RTX 2080 and RTX 2070 are both based on TU104? The Turing white paper states that the RTX 2070 is based on the TU106. Nov 13, 2018 · The NVENC/NVDEC Matrix and Video Codec SDK pages have been updated. But I haven’t found any guide for NVDEC/CUVID. 注意:VAAPI 是inter gpu 提供的硬编解码接口 VDPAU 是 video decode present api for unix nvdec / ncvid 都是nivida产出的硬解接口，区别在于解码方式，和数据传输方式不同 nvenc nivida 硬编接口编译 & 运行… May 5, 2017 · Hi, I have an Optimus laptop with i3-2310M and NVIDIA 520M. To know about the Apr 15, 2019 · These hwaccels, particularly cuvid (and the nvdec wrapper) do not implement threading support. May 21, 2024 · NVIDIA Video Decoder1. So I think the answer of @halfelf was wrong. Sep 9, 2018 · CUVID, which is also called NVDEC by NVIDIA now, can be used for decoding on Windows and Linux. Nov 8, 2022 · NVENC and NVDEC can be effectively used with FFmpeg to significantly speed up video decoding, encoding, and end-to-end transcoding. Dec 24, 2017 · NVDec is simply a marketing rebranding of CUVID. when i googled this i found only old outdated posts. 81 XP driver) in MPC-HC HomeCinema x86 1. Codec support varies by hardware. Oct 26, 2021 · NVDEC runs completely independent of compute/graphics engine. conf, results in software decoding. Any help is appreciated. Jan 27, 2025 · NVDEC runs completely independent of compute/graphics engine. Mar 26, 2024 · It lights up all of the CUDA cores of the GPU to perform the functionality. Post by Roman Gorelik Can someone explain please what is the difference between hwaccels cuda and cuvid? Which one should be used in which cases? Jan 31, 2020 · I am trying to transcode videos to multiple resolutions using ffmpeg and node. And it's only disabled for H. 236 (KMPlayer 4. 8. The software API, hereafter referred to as NVDECODE API lets developers access the video decoding features of NVDEC and interoperate NVDEC with other engines on the GPU. Dolby Vision support requires that this option be checked in order to enable NVDEC. Based on the instructions provided by the official PyTorch Oct 26, 2021 · NVENC and NVDEC can be effectively used with FFmpeg to significantly speed up video decoding, encoding, and end-to-end transcoding. Description Why are there two separate implementations of nvidia hardware acceleration? As far as I understand nvdec is simply a rebranding of cuvid. Y: Supported, N: Unsupported 1: Present in select GPUs 2: Present in select GPUs 3: GA10x GPUs include all GPUs based on Ampere architecture except GA100 What’s Accelerated video decoding with NVDEC Author: Moto Hira This tutorial shows how to use NVIDIA’s hardware video decoder (NVDEC) with TorchAudio, and how it improves the performance of video decoding. There are a *lot* of configuration options related to hardware encoding, and I'm not sure which ones do what In the end, I just want nvenc. Mar 26, 2024 · This was true, but newer ffempeg implementations now use CUVID as a way to call NVENC/NVDEC, which is now reflected in the link provided in the documentation link at the bottom: CUVID for encode and decode is decades old and should be considered depreciated. Oct 4, 2018 · Recent ffmpeg versions fail to use the deinterlacer of nvdec (cuvid). Using hwaccel nvdec makes ffmpeg consume much more VRAM when compared to hwaccel cuvid, thus reducing the total amount of transcode sessions that can run on certain hardware. I captured a trace using nsys and attached is a screenshot demonstrating the issue. 1k次。NVDEC的cuvid-API主要列举记录_nvdec Dec 21, 2018 · 1 According to Nvidia Video Encode and Decode GPU Support Matrix (snapshot), GeForce 820m support NVENC & NVDEC. Both use a dedicated video engine. NOTE I have an NVIDIA 1080ti and haven't been able to notice a difference between the options (D3D11 vs. Apr 30, 2019 · I believe nvdec is the Nvidia proprietary solution while d11va is directx 11 video acceleration, which is a more generic solution, probably not as good. They can be used for encoding and decoding on Windows and Linux. And I'd assumed random dithering would be less visible, and should take very little effort (extra work). So, the way I do it, if d3d11 fails I use nvdec, if even it fails I use -c:v hevc_cuvid as input option. Oct 28, 2024 · CUDA (NVENC/NVDEC) NVENC and NVDEC are NVIDIA's hardware-accelerated encoding and decoding APIs. If my understanding is correct, a Nvidia graphic card that support NVENC & NVDEC should support h264_cuvid decoder in FFmpeg as well. 264 decoder and encoder. So, you need to use decoder that copies frames from video to operational memory. Sep 4, 2018 · Happy Friday everyone, The NVENC/NVDEC Matrix and Video Codec SDK pages have been updated. Jan 15, 2023 · Platform: Windows 11 x64 GPU: NVIDIA RTX 4090 May I get a little help on understanding the pros and cons of "d3d11va" vs "nvdec" for hardware decoding on Windows? Basically, the difference between the following two: mpv --vo=gpu-next, -- Sep 8, 2019 · -hwaccel means to keep the decoded frames in GPU memory -c:v h264_cuvid and -c:v h264_nvenc mean to select NVIDIA hardware accelerated H. 4 and above Mar 28, 2023 · Thank’s for your reply @val. DXVA2 cb vs. The compiled ffmpeg has mostly common filter and other useful filter, support CUDA CUVID Vulkan NVENC NVDEC zscale libplacebo Sep 17, 2017 · what is the difference between them? They are very similar. You word your post as if you're paying 6 dollars for ONLY hardware acceleration, that's obviously not the case. Postprocessing may also use CUDA capabilities. 1 Jan 14, 2025 · This repository provides a Dockerized setup for using GPU-based video decoding and encoding with FFmpeg and NVIDIA's NVDEC/NVENC, integrated with TorchAudio. I can run this from the commandline to transcode a video to 720p: ffmpeg -vsync 0 -hwaccel cuvid -hwaccel_device 0 Introduction All NVIDIA® GPUs starting with Kepler generation support fully-accelerated hardware video encoding and decoding. 部分硬件转码_豆饭的小窝_新浪博客,豆饭的小窝, NVIDIA 编解码硬件 NVIDIA GPUs 船上配备了片上硬件编码器和解码器单元，通常称为 NVENC 和 NVDEC 。与 CUDA 核心分开， NVENC / NVDEC 运行编码或解码工作负载，而不会减慢同时运行的图形或 CUDA 工作负载的执行。 NVENC 和 NVDEC 支持许多重要的编解码编解码器。 NVIDIA 。 Jul 8, 2018 · Latest Git build, but it's been this way for as long as I've had my GTX 1050 (a few months) Windows 10 Reproduction steps Using hwdec=cuda or hwdec=nvdec in the mpv. So first seems to lead to NVDEC second to CUVID bmegli added a commit that referenced this issue Jan 12, 2023 Sep 22, 2024 · N4100的UHD600核显在WIN10 LTSC下可以调用D3D11和DXVA2模式硬解H265 10BIT视频，这点相比兆芯C960其实强一些，目前还没有发现WIN下什么播放器能正常调用兆芯核显的DXVA2 H265 10BIT的硬解。毕竟已知D3D11模式的解码效率还是不如DXVA，解码同样的视频功耗偏高，本期也验证了这个结论。本期有意外收获，安装LAV The Enable enhanced NVDEC decoder feature toggles between the newer NVDEC and the older CUVID decoding processes. We would like to show you a description here but the site won’t allow us. Why are you complaining that a COMPANY is trying to make money? Christ. Newer versions drop frames. 04 (Hardware Transcoding) Like I suspect many of you were, I was surprised to learn that Emby recently moved hardware transcoding behind their Premiere paywall. As per the documentation, auto - forcibly enable any hw decoder found auto-copy - enable best hw decoder with copy-back Can anyone enlighten me what's a copy-back ? Is it a CPU intensive process ? Which one should I stick with ? If I check some copy accelerations below, they show - copies video back into system RAM What's the purpose of doing that, instead of regular non-copy ? Jan 2, 2001 · CUDA / CUVID / NvDecode CUVID现在也被Nvidia称为nvdec，可以在Windows和Linux上进行解码。结合nvenc，它提供了完整的硬件转码。 CUVID提供H264, HEVC, MJPEG, mpeg1/2/4, vp8/9, vc1解码器。编解码器支持因硬件而异。 1、使用CUVID解码器，本例中CUVID解码器将帧复制到系统内存中: The NVDEC engine on NVIDIA GPUs is a dedicated hardware block, which decodes the input video bitstream in supported formats. CUVID and the other one would be about client capabilities. In fact, they'll throw warnings at you if the thread count exceeds 32. 10. Example command, input. "ffmpeg -decoders" displays some cuvid-related things, but nothing nvdec-related 5. Which hardware acceleration mode should I use? Quick Sync, DXVA2 or CUVID for best quality and best 4. However, when I do avcodec_open2, it fails. DXVA2 uses D3D9 video functionality, while D3D11VA obviously uses D3D11. 1. ts -vcodec h264_nvenc -preset slow -c:a copy -r 50 -f mpegts output. It includes the necessary setup to leverage GPU acceleration for video processing and a Python script to compare the performance of GPU vs CPU-based video processing. Saying that it's "not complicated" is extremely ignorant. 18 there was a note about the TU117 having the same NVENC unit as the Volta-gpu (GV100). some even from 2013. Mar 5, 2025 · NVDEC Settings Decoder Checkboxes vs Nvidia Matrix View a Printable Version Subscribe to this thread Forum Jump: However, if I use cuvid instead of nvdec, it works just fine. i have a nvidia gtx 1080ti. 8 everything works fine, with 3. Yet in FFmpeg they coexist and exhibit different behaviors. They differ in how frames are decoded and forwarded in memory. What I've managed to do is a double shot copy using 2 d3d11 textures (luma + chroma), 2 Oct 31, 2024 · Hi Devs)) I’m trying to compare the performance of FFMPEG compiled with NVDEC versus NVDEC used directly with CUDA. vz. However, I have found official tutorial from NVIDIA for compiling FFMPEG from source with NVENC enabled. When using scale_npp with cuvid it can be used with just "-vf scale_npp=" whereas nvdec requires "-vf hwupload_cuda,scale_npp=" I'm not sure which of those are bugs, which are by design, which This tutorial shows how to use NVIDIA’s hardware video decoder (NVDEC) with TorchAudio, and how it improves the performance of video decoding. Jan 31, 2021 · Can I test funcion of nvidia decoder (nvdec/cuvid) on generated ffmpeg video? Asked 4 years, 9 months ago Modified 4 years, 9 months ago Viewed 2k times Limitation using native (Quicksync, CUVID/CUDA, old DXVA2 native, old VDPAU) is lack of freedom doing post processing can cause glitch, massive frame drops, stuttering, flashing frame, corrupt time stamp, slowest playback and so on. [2] Apr 6, 2022 · The difference between CUVID and NVDEC in ffmpeg is that in case of CUVID, the whole video stream is sent to and processed by the Nvidia Media API and in case of NVDEC, the parsing is done by ffmpeg and only the video frame data is sent to the Nvidia API. Sep 17, 2016 · Developers, answer please HEVC Main10 hardware decoding will work via the CUDA (CUVID) API on Windows (I like XP)? HEVC 3840x2160 8bit hardware decoding via CUVID works pretty well on Windows XP with comparatively cheap (~100$) Palit GTX 750 1GB NE5X750THD01-2065F on GM206-150-A1 chip (I tried with last 368. 264, HEVC, MJPEG, MPEG-1/2/4, VP8/VP9, VC-1. I’m receiving CUVIDPARSERDISPINFO packets from nvdec, what I want to do now is a zero copy to d3d11 texture for rendering. The current document highlights only the changes in the current video codec SDK package with respect to the previous SDK packages. Aug 14, 2020 · Conclusion To use the video memory efficiently, particularly when running multiple instances of NVDEC decoding, it is important to ensure that the decoder is configured for most optimum memory utilization. Jun 13, 2017 · CUDA ffmpeg -hwaccel cuda -i input output CUVID ffmpeg -c:v h264_cuvid -i input output Full hardware transcode with NVDEC and NVENC: ffmpeg -hwaccel cuda -hwaccel_output_format cuda -i input -c:v h264_nvenc -preset slow output If ffmpeg was compiled with support for libnpp, it can be used to insert a GPU based scaler into the chain: Video apps and streaming enabled by NVENC and NVDEC on consumer laptops, desktops and datacenters ensure optimized performance across platforms. Here's the guide for users who want to know NVIDIA hardware acceleration basics and get started with NVIDIA GPU acceleration. Notices 2. 1 has to be fixed as well. But cuda-copy and nvdec-copy, work E Sep 2, 2025 · 文章浏览阅读2. There is no difference in t Sep 29, 2018 · CUVID/NVDEC完全硬件转码vs. Jul 24, 2019 · Separate from the CUDA cores, NVENC/NVDEC run encoding or decoding workloads without slowing the execution of graphics or CUDA workloads running at the same time. Just because you can compile FFmpeg with support to utilize hardware acceleration on various video cards, doesn't mean that it's easy to implement. There's no practical differences with performance between the two, but it's annoying how nvdec just doesn't work. NVENC API for video encode acceleration NVDEC API for video decode acceleration (formerly called NVCUVID API) NVIDIA GPUs contain one or more hardware-based decoder and encoder (s) (separate from the CUDA cores) which provides fully-accelerated hardware-based video decoding and encoding for several popular codecs. The choice exists because it is difficult to detect automatically which one will work better in all cases, but when in doubt, trust the defaults. This note was removed in the SDK 9. adding --enable-nvdec returns unrecognized option during . The test was based on the Big Buck Bunny movie and the procedure should be self-evident from the commands below, but roughly: transcode the original to NV12 lossless, use this as the base for comparison create an interlaced version deinterlace with Why do you use DXVA2 oder Nvdia's NVDEC? NVDEC runs completely on fixed-function hardware on the GPU without any CPU overhead. In combination with NVENC, it offers full hardware transcoding. And I want to prove that point with ‘ffmpeg -c:v h264_cuvid’ vs ‘ffmpeg -hwaccel nvdec’. ie, the maximum h265 horizontal resolution is 8192 on a GP10x, 4096 on a GP100 or less, and unsupported on any architecture less than GM206. The hardware encoder and hardware decoder are referred to as NVENC and NVDEC, respectively, in the rest of the document. There is no substantial difference in performance as both have to do the wasteful roundtrip over the main memory instead of keeping decoded frames in the graphics card memory and just Nov 8, 2022 · Introduction NVDEC Capabilities At a high level, Table 1 summarizes the capabilities of the NVDEC engine exposed through NVDECODE APIs, and What’s new summarize the features exposed through NVDECODE APIs in Video Codec SDK 11. This document provides information about the capabilities of the NVDEC engine and the features exposed through NVDECODE APIs. Apr 20, 2023 · NVDEC runs completely independent of compute/graphics engine. NVIDIA Corporation (“NVIDIA”) makes no representations or warranties, expressed or May 8, 2019 · I have learn’t that latest FFMPEG 4 supports HW acceleration which is compatible for Maxwell arch GPUs like on Jetson Nano. FFmpeg refers to NVENC/NVDEC interconnect as CUDA. 0. The code looks like as follows: void decodeOneFrame() { nvtx3::scoped_range function_range{"decodeOneFrame"}; while (true The hardware capabilities available in NVDEC are exposed through APIs referred to as NVDECODE APIs in this document. According to chapter 2 of the (woefully inadequate) manual, decoding limits are specified by GPU architecture. Feb 28, 2018 · When I try to configure ffmpeg, it says: ERROR: cuvid requested, but not all dependencies are satisfied: cuda Newer ffmpeg will show a similar, re-worded message: ERROR: cuda requested, but not all dependencies are satisfied: ffnvcodec I absolutely don't know why I'm having this issue, because I am compiling ffmpeg on all of our trans-coding Jul 8, 2024 · Hi all, I am using NVDEC with FFMPEG to decode videos and I am seeing decoding time slower than multicore CPU decoding. 0, DVBViewer 5. SVP needs these frames in operational memory. May 5, 2022 · 本文详细介绍了FFmpeg如何利用Nvidia的硬件加速API，如NVENC和NVDEC（CUVID），进行视频编解码。 NVENC/NVDEC提供硬件加速编码和解码，适用于H. ts is a 1080i50 file: ffmpeg -hwaccel cuvid -c:v h264_cuvid -deint adaptive -resize 1280x720 -f mpegts -i input. This post demonstrates which decoder configuration parameters impacts the video memory usage and how to configure them optimally. This document explains ways to accelerate video encoding, decoding and end-to-end transcoding on NVIDIA GPUs through FFmpeg which uses APIs exposed in the NVIDIA Video Codec SDK. One of the differences I’ve noticed is that using directly NVDEC approach eliminates the Device to Host data transfer which is a costly transfer. Introduction All NVIDIA® GPUs starting with Kepler generation support fully-accelerated hardware video encoding and decoding. 264 encoders (using avcodec_find_encoder(AV_CODEC_ID_H264)) I *do* in fact see the NVENC encoder, so success there. CUVID offers decoders for H. We can use nvdec to replace cuvid Mar 8, 2024 · NVDEC runs completely independent of compute/graphics engine. To know about the Introduction All NVIDIA® GPUs starting with Kepler generation support fully-accelerated hardware video encoding and decoding. Nvdec is probably the best. The goal is . The hardware capabilities available in NVDEC are exposed through APIs referred to as NVDECODE APIs in this document. 2. The full set of codecs being available only on Pascal hardware, which adds VP9 and 10 bit support. In the Feb 24, 2022 · The choice of cuvid vs nvdec is something you'll just have to try and see what works best for your hardware. 7. No luck so far. 265 decoding not working (but CUVID does) By ctaranto April 6, 2022 in Linux ffmpeg: NVidia hardware encoder `h264_nvenc` and hardware decoder `h264_cuvid` - Documentation (Nov 2020) - ffmpeg -h decoder=h264_cuvid Sep 11, 2021 · D3D11 decodes frames from video stream and leaves them in video memory. It lights up all of the CUDA cores of the GPU to perform the functionality. nvdec is not displayed when running "ffmpeg -hwaccels" 6. Is it correct the TU117 has an NVENC unit from the Volta generation? If NVENC / NVDEC Working in Jellyfin on Ubuntu Server 18. Another difference while using the FFMPEG approach is that ‘cuvidParseVideoData’ and ‘cuvidMapVideoFrame’ are executed in Sep 24, 2021 · It's weird as the switch of NVDEC/CUVID decoder is almost controlled by user for the time being. ffmpeg # CUDA/CUVID/NVDEC # 完全硬件转码 vs 部分硬件转码 CUVID, which is also called NVDEC by NVIDIA now, can be used for decoding on Windows and Linux. They used to be called CUVID. Could the Quadro RTX 4000 be added? May 17, 2017 · I am implementing a video decoder using NVidia's NvDec CUVID feature. A typical video decode and display application consists of the following stages: Sep 23, 2020 · One would be related to NVDEC vs. /configure.