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Interlaced H264 DXVA decoding on RX 480

Question asked by buchanan on Jul 18, 2016
Latest reply on Mar 9, 2017 by mclingo

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Hello,

It seems that DXVA decoding of interlaced H264 content on RX 480 is broken, I get this result :

Here is the sample used : http://carte.fh.free.fr/meteo.ts

The results are identical wether I use any of these players :

- MPC-HC 1.7.10.252 x64 (internal LAV 0.68.1.25), DXVA2 native

- MPC-HC 1.7.10.252 x64 (internal LAV 0.68.1.25), DXVA2 copy-back

- VLC 2.2.4, DXVA2 hardware acceleration

Progressive content is playing fine as far as I can tell.

My config:

Windows 7 64 bits

AMD Radeon RX 480, 16.7.1 driver

Intel core I7 4960X, 24GB RAM

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amdpete Jul 18, 2016 8:05 PM
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Report the issue here please:
AMD Issue Reporting Form
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hklamgary Aug 25, 2016 9:09 AM
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Same issue in my RX 470
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hklamgary Aug 27, 2016 12:52 PM
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Everyone can try play this TS file with Windows Media Player or other players
https://drive.google.com/open?id=0BztD3ZcBuR_9V3N6WV9qbVBLOG8
No issue with any Nvidia card or old AMD HD card , but RX470 cannot play properly with DXVA
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- hklamgary @ hklamgary on Sep 4, 2016 1:53 PM
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  Reported but still no feedback from AMD
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- derrickgott007 @ hklamgary on Sep 14, 2016 12:28 AM
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  CLicking that link with an RX480 it plays fine (Except the sound is a tad off sync) but the picture looks fine.
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  - hklamgary @ derrickgott007 on Sep 14, 2016 6:43 AM
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    Please download to play.
    Do not play online as it will re-encode by youtube
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  - hklamgary @ derrickgott007 on Sep 14, 2016 6:45 AM
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    Below is the result when play in WMP with DXVA.
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mclingo Sep 11, 2016 9:40 AM
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same on all RX cards, this is unfuriating, no fix with latest hotfix driver, how are AMD getting away with this, not one single tech site has picked up on this major flaw yet and i've mailed several, AMD must be paying them off

There are also two other open threads about this, AMD remaining totally silent.
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mclingo Sep 13, 2016 11:07 AM
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Have you seen this, someone reckons they can get DXVA working by preventing CPU clock down use clock blocker.

RX 460 H264 DXVA decoding malfunction
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- mclingo @ mclingo on Sep 13, 2016 11:16 AM
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  did nothing for me, suspect he was referring to the black screen issue and no the DVXA problem.
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p87uhx Sep 13, 2016 1:19 PM
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Same problem here with a RX 460.
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nabeeln Sep 14, 2016 1:43 AM
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Trop chaud !
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mclingo Sep 14, 2016 6:50 AM
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no point anyone else testing this, its clear all RX cards have this issue, hoping it just a driver issue but with all the other problems i've had with the card i'm getting very close to returning it, I may drop it back at the shop Saturday if AMD havent at least acknowledged the problem by then.

I'll then drop back to my old 1080p card for HTPC use and go back to gaming on my PS4, might spend the money on getting a PS4 Pro instead as i'm well p!ssed with AMD for not acknowledging the black screen issue at all, they still haven't, they just fixed it pretending it never happened.
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- hklamgary @ mclingo on Sep 14, 2016 7:47 AM
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  It must be driver issue.
  HD4670 had similar issue before but finally fixed this with new driver release.
  
  And also I found this issue may related to H.264 i p b frame. RX card seems do not know how to start play with the frame structure correctly.
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mclingo Sep 14, 2016 7:53 AM
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not suggesting you are fibbing or anything but do you have an links to the 4670 issue, more ammunition for my RMA / return.
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- hklamgary @ mclingo on Sep 14, 2016 9:28 AM
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  No link for HD4670 issue as long long years ago.
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mclingo Sep 14, 2016 2:57 PM
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h265 is not working at all on mine now, i dont even get a picture, i have to turn both off now, FFS
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- saebasan @ mclingo on Sep 14, 2016 8:07 PM
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  What did you do between before and now?
  Drivers upgrade?
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saebasan Sep 14, 2016 8:29 PM
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To sum up, I'm not a specialist of those things, but I try to understand what's the origin of the problem.

Can we exculpate the player and its codecs, because, in my case with VLC, it is able to play any video whatever the state or the provenance.
Cut or not, transcoded or not, raw from a camera or not, ... Whatever
On the CPU, it's always perfect.
Nice, clear, and smooth.

Which makes me tend to think that these software pieces are able to handle these data and transmit it to the CPU with the right instructions in order to make the job DONE.

On the RX with the DXVA, it' s like a lottery. Sometime yes, sometime no, sometime no perfect...
Why a so well called "powerful" process unit, like this 5.8 Gflop GPU, is not able to do so???

This is frustrating
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mclingo Sep 15, 2016 4:10 AM
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Those claiming that video playback is ok int other players not using LAV filters will find that their CPU is doing all the work, i've spent some time thoroughly testing this with VLC, KODI, windows media player, pot player and MPC, nothing f them can hardware accelerate H264 and H265 in the last two driver versions.

If memory servers I was able to get H265 working in earlier versions but i'm not rolling back to the black screen issue. I'm very close to returning this card and moving back to 1080p while they get this sorted out, I'll then buy the card again when its cheaper, when they have to discount them to get rid of them as buyers have lost confidence in AMD.
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- hklamgary @ mclingo on Sep 15, 2016 8:57 AM
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  Bros, we must keep complaint to the AMD issue form and AMD customer care !
  Also post it on different famous PC forum to let media aware.
  
  AMD Issue Reporting Form
  
  Online Service Request
  Email Form
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mclingo Sep 16, 2016 5:24 AM
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bump
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mclingo Sep 19, 2016 5:53 AM
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i'm starting to think we have faulty cards, an issue as big as this should have been picked up by the industry by now, some guy on another forum says H264 is working for him as well, do we assume he is wrong?

Really angry with AMD at the moment, its should be a simply question, are our cards faulty or not?, we just want to know.
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- hklamgary @ mclingo on Sep 19, 2016 8:12 AM
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  I can sure this can be fixed by driver.
  I tested using DVBViewer to play H.264. If keep rebulid decoder (reload decoder) several times, you can have start playing it properly in particular trial if you lucky.
  So, it must be related to the card do not know how to start playing with correct i, p, b, frame in H.264 or missed frame in H.264.
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  - saebasan @ hklamgary on Sep 19, 2016 9:56 AM
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    As for me, decoding is working on some h.264 files, not on those I cut and arranged in my Nikon camera.
    With H.265, nothing works
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mclingo Sep 19, 2016 10:23 AM
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we need to be clear about what you mean by "works". With H264 enabled in LAV filters videos play, sometimes ok but as soon as you skip it corrupts. Sometimes its corrupted from the beginning, some times the corruption goes for a while and comes back. If you turn H264 off in LAV then all the work is being done by your CPU and so you will likely see no issues as most CPU's can chew through H264 fairly well. If H264 decoding is working your CPU usage should be around 1-5%, anything else, its not working.

H265 doesnt work at all for me now either, it was working but choppy in previous driver versions but I dont want to go back as i'll start getting black screens again.

If you insist this is working please post a screen shot of the movie compression / size / codec specs and please confirm your CPU is in fact only running at 1-5%.

i'm convinced H264 is broken on all cards, I just dont think peeople generally know how to tell whether it is, for instance if you are using VLC, its probably using your CPU not GPU.
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- hklamgary @ mclingo on Sep 25, 2016 12:20 AM
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  Crimson 16.9.2 still no mention this issue in the release note and no planned to fix !
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haroon.aslam Sep 26, 2016 8:58 AM
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I have same issue, Things were fine in my old gtx 950, but now i'm unable to play 4k videos. Gom player wont even recognize the GPU as hardware acceleration supported. Tried everything now reported this to AMD and waiting them to release some update regarding it. I'm using RX 470 btw.
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hklamgary Oct 7, 2016 8:29 AM
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Very good news to this post !

Crimson Edition 16.10.1 Hotfix

Radeon-Software-Crimson-Edition-16-10-1-Release-Notes
Known Issues
H.264 content may experience blocky corruption when streaming using P2P content players on some Radeon RX 400 series graphics products.
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mclingo Nov 4, 2016 6:40 AM
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new driver released, will test and report back
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mclingo Nov 4, 2016 7:32 AM
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great, that just shafted my PC, it now wont boot into windows, piece of sh!t card.
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mclingo Nov 4, 2016 9:21 AM
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another pointless update, DXVA still broken, FFS AMD how long do we have to put up with this?
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mclingo Nov 4, 2016 4:42 PM
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worse than pointless update, blue screened my pc and wouldnt boot, had to system restore. Tried again, this time ok but still not fixed the problem with the addition of even worse playback in kodi even with hardware acc off, now it wont play anything in kodi at all. Backup to 8.3.

You have to wonder if AMD have a room full of monkeys just randomly tapping in code to produce their driver updates and they seem to be getting steadily worse for us movie users.

I really feel for anyone who bought this card just for their HTPC, the 460 owners will be might pissed with AMD.
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mclingo Nov 18, 2016 10:28 AM
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hotfix 4 has some sort of H264 fix onboard,however....

These are the drivers you're looking for... again...., yes its still not fixed...again... after several months and more than 10 releases....

Thanks AMD.
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mclingo Nov 21, 2016 5:27 PM
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Display driver amdkmdap stopped responding and has successfully recovered.

great hotfix, thanks AMD, I love it when my pc freezes and i have to hard boot it, its just so great for my 10 hard disks, 3 or more of which have died since i bought this effing card.
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mclingo Nov 25, 2016 9:45 AM
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Time to BUMP these still no fix from AMD
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crisidelm Dec 2, 2016 8:03 AM
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Still getting this problem with latest driver (Crimson 16.11.5 hotfix for Win10) and a brand new RX460. HEVC plays fine though (via sat channel).
One possible workaround to this problem I've found is to use old VMR9 (with YUV mixing) as a video renderer; H.264 plays correctly this way, but it's a suboptimal solution given the limits of VMR9 itself (for instance with it, HEVC does NOT play fine). In fact I presume that switching to VMR9 as video renderer turns off HW video acceleration altogether...
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crisidelm Dec 9, 2016 3:14 AM
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For those interested, with latest 16.12.1 things haven't really changed...
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- hklamgary @ crisidelm on Dec 9, 2016 4:00 AM
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  16.12.1 still do not fix it
  And don't know why AMD removed this issue in the release note !
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mclingo Dec 9, 2016 4:22 AM
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I know I an LIVID about this, this more than 15 updates to the drivers with ZERO attempt to fix what should be a standard feature of a GFX card, H264 decoding, now like you say they are pretending it isnt a problem.

I starting to think there is a major fault with this card and they cant fix it, we need a class action suit.
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hitman Dec 9, 2016 4:17 PM
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Guy's there is another major issue I found with video playback, bluray etc..., if you care about calibrated image quality.

The output for video playback is clipped at the black and white levels, no matter what setting you use unless you are able to use a PC monitor for 0-255 with video playback, all 16-235 pixel options don't work correctly, which also distorts the gamma especially at the higher end, see my report post here...

Video playback colorspace issue with Crimson and RX480
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scouseman Dec 12, 2016 10:17 AM
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Just bought a rx470 for my HTPC machine, can't believe AMD haven't got something so fundamental working on the GPU cards after 6 months. Sent a support request regarding this, even an acknowledgement would be nice.....

Will be sending mine back, before the 30 day return period finishes and buying a proper GPU card....
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mclingo Dec 12, 2016 10:33 AM
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I know mate, its infuriating isnt it, more so that tech sites are completely ignoring this issue, I mailed loads of them and they didnt give a hoot, you'd think that dirt like this, they'd be all over it.

I thought about dropping back to my old 1080p card which works fine but then I get no more 4k desktop and no more HEVC decoding, stuck between a rock and hard place I dont want to do NVIDIA due to 3D playback issues.
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crisidelm Dec 21, 2016 9:34 AM
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16.12.2 aaaand nothing has changed for H.264.
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mrmo7 Jan 15, 2017 6:06 AM
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This week I bought a XFX RX 460 (1 slot version) to replace old 7750 card in my htpc which I use for Kodi and DVBviewer (satellite and cable).
After installing RX 460 everything worked fine except HD satellite broadcasts. Reinstalled the software without results, checked cables, in fact checked everything. As a last resort reinstalled windows 10, still the same HD issues. It then turned out that I couldn't play recorded TS-files properly, they were fine if you only played them but cracked up once you fast forwarded of rewind.

For the time being if have set DVBviewer to VMR9, but this is only a short term solution. Like others in the thread HEVC works fine, but the problem with H264 is very dissapointing. I wish I knew this before I bought this card, I would have bought a Nvidia 1050 instead. I have used AMD cards since I bought my first Mach 32 back in the early 90's, I feel a bit let down especially because this card has been on the market a while now and they haven't been able to sort this out. I will be watching out for the next driver update but won't hold my breath. If it takes to long I will have to switch to the green camp.
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mclingo Jan 15, 2017 12:10 PM
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yes its very sad that long term ATI users like ourselves are considering never buying ATI again, not because they havent fixed it yet, although that plays a part, its to total lack of support and answers we get on here thats swaying it for me. Every now and again a support engineer pipes up, suggests something is happening and then goes silent again, its infuriating, i'm starting to think these people are being gagged by AMD.

For me its totally unacceptable to bring out a new card VEGA when the current one has never worked properly since it came out, total lack of respect for customers.
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mclingo Jan 16, 2017 9:28 AM
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BUMP
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mrmo7 Jan 18, 2017 4:19 PM
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Tried new crimson driver 17.1.1 . No change
After a week of watching satellite TV with the vmr9 driver I have decided to ditch the rx460.
Tried gtx960 which I borrowed and for me it does what it says on the box: satellite broadcasts look sharp and crisp and so do Blu-ray movies on my projection screen
Will exchange the rx460 for gtx1050 #shameonyouamd
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kobikobi Jan 22, 2017 6:09 AM
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Same issue on Sapphire RX 460 Nitro 4Gb. h.264 encoded videos HW decoding causes image corruption on some sources (not all) when forwarding or skipping. For P2P - happens always.
Windows 10 64 bit / Drivers 17.1.1
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dhallam Feb 3, 2017 2:31 AM
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Also got the same issue here, bought for my kodi 4k tv setup having major issues with dvxa interlaced tv streams and h264 playback. the same stuttering/green issues.

Have also e-mailed support as this is not acceptable, and the lack of info or action shows me that this is not a software issue but a hardware issue on these cards, As this has been going on for over 3+ months posts on this forum.
And if this is the case they need to accept this and offer refunds, as I only bought this card for a HTPC setup and this is one of the major features for HTPC users.

Rant over...... and looking at 1050's as we speak.
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mclingo Feb 3, 2017 4:49 AM
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yeah, we've all had a bit of a rant and this thread and this other one, i've come to terms with this now, had to as it was making me really angry, especally now i've had my card to long for a straight rufund.

The is some light at the end of the tunnel though, follow this thread:

RX480 DXVA H.264 not working.

Note, you CPU can decode H264 in the meantime and has you will have no issues with H265 you should be able to live with this until its fixed, if they dont fix it soon though I might contact trading standards in the UK to see if I can force a refund on the premise of "unfit for purpose".

I'm willing to give AMD another 30 days though.
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mrmo7 Feb 3, 2017 12:54 PM
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I switched to gtx 1050 two weeks ago after getting annoyed with rx 460, but was very disappointed with the sharpness of the tv picture the gtx 1050 produces compared to rx 460. AMD does do a better job when the card works. In the meantime I have gone back to rx 460 in combination with powerdvd codec, it works well in dvbviewer and I love the sharpness of the picture. Still can't recommend it to anybody as long as interlaced H264 DXVA problem persists.
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crisidelm Feb 16, 2017 10:29 AM
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With latest AMD driver, 17.2.1 it appears that the H.264 bug has finally been patched; been testing on live H.264 1080i and 720p Sat channels and they are playing fine with the aforementioned drivers.
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- mclingo @ crisidelm on Feb 16, 2017 10:32 AM
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  sadly its not totally solved, dont bother with this thread now, use this one. it is vastly improved is some areas, KODI no longer exibits any problems for me but there is still some corruption using LAV filters +MPC and other apps.
  
  Current thread the AMD engineers are involved with, keep all comments here from herein if possible.
  
  https://community.amd.com/message/2780477#comment-2780477
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  - scouseman @ mclingo on Feb 26, 2017 5:16 AM
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    mclingo,
    
    What video processing settings are you using in kodi?
    As when I force DXVA I am still having problems.
    
    Cheers
    Attachments
    dxva.PNG348.7 KB
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mclingo Mar 9, 2017 4:40 AM
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BUMPING this one as where latest drivers show some improvement there is still corruption when skipping using DXVA hardware H264 decoding.
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Re: WHY IS H264 STILL NOT WORKING PROPERLY ON ANY RX CARDS AFTER 15+ UPDATES???

Interlaced H264 DXVA decoding on RX 480

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