Device architecture cuda or dxva2 directx video acceleration nativerenderless or intel quicksync decoder or high performance software decoding. Apr 09, 2016 hi, im facing a trouble with enabling dxva2 support in lav video decoder. Lav filters directshow media splitter and decoders. It can also list the supported modes and usage conditions of your directshowmedia foundation decoder. And dxva2 native is not a good solution for nvidia, as it does not allow. And 2160p60 hevc 10bit is going to send your cpu into hell. In addition to dxva2 native, we also used the quicksync decoder developed by eric gur an intel. So i tried the software decoder today by disabling the dxva decoder.
Architecture cuda or dxva2 directx video acceleration nativerenderless or intel quicksync decoder or high performance software. Dxva2 native versus dxva2 copyback dxva implementations come in two variants. Im not sure if the gtx 960 video engine can actually hardware decode 10 bit video so its up too software. When dxva2 is in use, on the 2nd line you will see dc. Hmm, i dont think cpu usage shouldnt really change with dxva2 vs cuvid, if anything cpu usage would be lower in. To test and verify, while playing a video press the o key to enable the onscreen display. Results 1 to 3 of 3 lavfilters, amd r9 290x gpu, h264, dxva2 hw decoder high fan speednoise. Directx video acceleration dxva is an api and a corresponding ddi for using hardware acceleration to speed up video processing.
In the default skin, go to system settings video playback. I set the dxva2 mirror mode in lav filters and later dxva2 native mode, but there is no difference in cpu usage. Fixed decode benchmark does not start issue when the media foundation decoder fall back to software decoding. Decoding and rendering benchmarks intels haswell an. Free download missing dll files for windows 7, 8, 10, xp, vista. The setting dxva2 native can only be used where the video decoder is connected directly to the renderer. Directx video acceleration dxva specification for h. Selecting a language below will dynamically change the complete page content to that language. Unfortunately, i cant attach any screenshots, but these are the evidences that dxva2 native decoder was not installed. Lav video decoder hevc performance 64 vs 32 bit zoom player. D3d11 native after reject video renderermadvr as example cant working and handle data from decoder. Fixed microsoft h265 video decoder mft writes data to the gpu memory even when it fall back to software decoding in decode benchmark. What i noticed was that the software decoder starts up more faster and has no green screen on startup while dxva always has a green screen and also takes some time to load.
Sep 27, 2012 the table below presents the results obtained with lav video decoder set to dxva2 native mode. For example, a software decoder can offload the inverse discrete cosine transform idct to the gpu. Video compression codecs are designed to all decode the same result. If hardware decoding is possible, use hardware decoding and leave software decoding for anything that the hardware decoder doesnt support. Device architecture cuda or dxva2 directx video acceleration native renderless or intel quicksync decoder or high performance software decoding. It may be helpful to toggle the dxva2 setting to do a before and after to see how much improvement you have. If it is not clear, im asking you to fix those bugs. With native implementation, the decoded video stays in gpu memory until it has been displayed. Due to lack of implementation of hevc decoding using qsv in the current version of lav video decoder both the dxva2 native and quicksync options did not properly work with the video. With evr if i set decoder to dxva2 native it doesnt work at all. When switching to dxva2 native mode, then video engine load drops to 0% and cpu load increases considerably. The internal dxva decoders in mpchc are native implementations, and ffdshow also offers a native implementation. Has issues with bluray support in mediaportal 1 dropped frames on clip boundaries as dxva requires video decoder to flush few frames.
H264dxva2decoderthis program works very well with nvidia cards and intel hd graphics 4000 windows7. If one decoder gave a different output than another, that would mean something was implemented incorrectly. Hi, im facing a trouble with enabling dxva2 support in lav video decoder. I did try software decoder and hardware decoder on the client my i3 laptop and it flashes up with both, thats when i got wondering if the quicksync decoder should be working. Default is generally a safe choice and it does deliver 1% cpu usage. If there is a filter between the decoder and the renderer or there is no renderer because we are outputting to a file then dxva2 native will drop back to software decoding. The pipeline allows certain cpuintensive operations such as idct, motion compensation and deinterlacing to be offloaded to the gpu. Mpchc video decoder comparison mpchc video decoders. Hardware video acceleration encoding and decoding lenovo. You can also use the listed decoders to play the video and measure the. It uses libavformat, the ffmpeg demux library that supports almost all the common video formats. Surprisingly the 1050ti had slightly less utilisation when decoding the hevc video than the h264 video.
The table below presents the results obtained with lav video decoder set to dxva2 native mode. Dxva specification for svc offhost vld mode decoding. The pipeline allows certain cpu intensive operations such as idct, motion compensation and deinterlacing to be offloaded to the gpu. Unfortunately, with intel graphic hd 500 and 510, decoding is not correct, for both windows7 and windows10. Software codecs and software video processors can use dxva to offload certain cpuintensive operations to the gpu. Anyways it comes down to the lav codec not using quicksync to decode the hevc files and a i37100u in the nuc not having the power for software decoding. How to tell if a dxva decoder has fallen back to software decoding. Such implementations dont have the limitations mentioned above and act similar to a normal software decoder.
The dxva is used by software video decoders to define a codecspecific. It is just ignoring setting or something even when next to the dxva2native optoion is available. I also noticed that liquidsky with the software decoder seems somewhat blurrier than with the dxva decoder. If dxva2 copyback is selected, then you can use a filter. Dxva2 copyback dxva2 native what it was set at intel quicksync nvidia cudvia none no difference. The bottom row will display an average which is your cpu usage. Codecs lav filters now support dxva2 page 8 mediaportal. Mar 23, 2016 dxva2 native versus dxva2 copyback dxva implementations come in two variants. Evaluation of hevc decoders sw, hybrid and hw software players. By default mpchc uses the dxva native decoder if it detects hardware that supports it. Using lav filterssplitters on mpchc and the nvidia cuvid, on all 4k 10 bit hevc samples i have there is zero gpu video engine acceleration.
In addition to dxva2 native, we also used the quicksync decoder developed by eric gur an intel applications engineer and made available to the open source community. It can also produce a trace log allowing you to check the usage condition of dxva within other applications. Directx video acceleration dxva is a microsoft api specification for the microsoft windows and xbox 360 platforms that allows video decoding to be hardwareaccelerated. This happens regardless of whether the plugin is unloaded first.
I have updated amd crimson drivers to the latest version available but still the dxva2 both native and copyback options of the lav video decoder doesnt show my amd radeon hd8750m card. Evaluation of hevc decoders sw, hybrid and hw page 12. Every time session with hevc decoder plugin is closed, it freezes the application for several seconds. Cuvid is suggested for nvidia cards but i still find dxva2 to be superior with my card. The data i use is sent from another computer, and the data can be directly filled to the buffers of dxva. Lav filterslavfsplitter is a set of directshow filters and splitters. Dxva checker allows you to check the status of the processor device and decoder device that can be used with your gpu. Nov 24, 2015 the issue is that dxva2 native decoder is not being installed.
I also checked the resolutions buttons for sd and 4k which were off by default. This issue only occurs when using dxva2 or d3d11 acceleration. Lavfilters, amd r9 290x gpu, h264, dxva2 hw decoder high. If vlc player is able to play the file, it doesnt mean it plays the file using hardware decoding. Dxva2 not supported in lav video decoder community. Version history and archived downloads page for lav filters. The limitation that the video decoder must be connected directly to the video renderer only applies the the native variant of dxva. As you havent used the command line arguments, youre very likely not actually using d3d11va, i. All use the same 100% cpu, and get the same stuttering framerate.
By specifying the media file or format, you can check whether the directshow decoder and media foundation decoder registered in the system support dxva, and the dxva mode that is supported. To play your video smoothly and on a huge variety of devices, plex media server often needs to convert the video to a different quality or a compatible format. The decoder device tab lets you know about your gpu model and manufacturers name, as well as the kind of decoding modes it support with supported resolution. Just turn off hardware deinterlacing as it destroys the quality on sd sources. Do not use the new d3d11 native decoding mode in lav video decoder if you. I managed to get the nvidia970 hardware acceleration working and can play most. Some applications or games may need this file to work properly. So it is not necessary to use the ffmpeg or ffdshowand the ffdshow is gpl, i cant use it. The dxva2 native decoder can now properly detect hardware support for video resolutions allows 4k dxva2 decoding on nvidia new options to control which resolutions are being handled by the hardware decoder sd, hd and 4kuhd added support for dvd menu overlays and dvd subtitles with dxva2 native improved dxva2 native support with madvr. Im evaluating zoom player as the best way to view hevc videos on my pc, and think i found the correct configuration to get the best performance from my combination intelsandybridge nvidia970 working. According to lav filters author, cuvid and intel quicksync are outdated, dxva copyback direct mode beats them both in performance. Enable hardware accelerated decoding via dxva2 in xbmc.
Configuring potplayer for gpuaccelerated video playback with. The reason is that the decoder does not report in any way that switch to software decoding mode and vr think that using d3d11 native and reject calling getallocator. Lav filters are a set of opensource directshow filters, aimed to eventually replace the better part of the playback chain required to play all and any modern media. Directx video acceleration dxva is a microsoft api specification for the microsoft windows.
Hardwareaccelerated streaming is a premium feature and requires an active plex pass subscription. Converting the video transcoding happens automatically, in realtime, while youre. The lav video decoder that is included in the pack offers both variants. Removed the dxva mode from decoder device selector in movie player if gpu does not support. If hardwareaccelerated video playback isnt your thing, i will also show you how to configure potplayer for highperformance software decoding for both h. Be able to use dxva renderless method even with madvr. The newest lav filters has hardware hevc decoding support. Dxva consists of a ddi for display drivers and an api for software decoders. I have updated amd crimson drivers to the latest version available but still the dxva2both native and copyback options of the lav video decoder doesnt show my amd radeon hd8750m card. Processing performed by the accelerator is called offhost processing. I could take a look at those files caracteristics to see why hardware decoding cant be used mofo77 aug 18 18 at 18. I would use hardware acceleration for h264 video decoding. What you need to check however, is that if dxva1 or dxva2 are there in the list or not. Fixed decode benchmark does not start issue when the media foundation decoder fall back to software decoding fixed scaling setting issue in movie player fixed output format of dxva2 decoder device might not shown on tooltip changed qfhd to 4kuhd updated dsfmft viewer minor changes and fixes version 3.
That is because chromium automatically works around amds driver bugs. Mpchc is saying software decoding in the bottom of window. May 24, 2012 the decoder device tab lets you know about your gpu model and manufacturers name, as well as the kind of decoding modes it support with supported resolution. You can also use the listed decoders to play the video and measure the decoder s cpu or dxva decoding performance. Directx video acceleration dxva is a microsoft api specification for the microsoft windows and xbox 360 platforms that allows video decoding to be hardware accelerated. Hardware acceleration is used to let the gpu decode the video to leave the. Hmm, i dont think cpu usage shouldnt really change with dxva2 vs cuvid, if anything cpu usage would be lower in dxva2 mode. When using intel quicksync or software decoding, flickering does not occur. Cant dxva2copyback and d3d11 native on mpeg2 high profile.
Typically the accelerator uses the gpu to speed up some operations. Nov 20, 2016 as you havent used the command line arguments, youre very likely not actually using d3d11va, i. Jun 10, 2016 dxva2 native versus dxva2 copyback dxva implementations come in two variants. Decoding and rendering benchmarks intels haswell an htpc. Can be used by any hardware that supports dxva2 intel might have some issues with vc1 video. Whenever the accelerator performs a decoding operation, the host decoder must convey to the. All the streams played perfectly, but the power numbers left us puzzled. Dxva2 native has its limitations, though i use it sometimes with interlaced video cause pci bus is too busy with traffic for copyback in this case. Anyway, at the time i had ugly video decoding using lav dxva2native, i didnt have any problem with lav cuvid, the one that gets ugly is only the dxva, but now both of them are okay. By default mpchc uses the dxvanative decoder if it detects hardware that supports it. The issue is that dxva2 native decoder is not being installed. Lav video decoder hevc performance 64 vs 32 bit zoom. I managed to get the nvidia970 hardware acceleration working and can play most hevc 4k videos.