Evaluation of HEVC decoders (SW, Hybrid and HW)

[clsid]

LAV supports AV1 just fine.

The Intel driver does not support DXVA2 hardware acceleration for AV1 video. Only D3D11.

You must NOT select the GPU in the hardware acceleration settings because that forces copyback mode, which is slower. If you have two GPUs, then you can specify the default one in the Windows display settings.

You must also use a video renderer that supports D3D11 native mode and D3D11 processing. So you need to use MPC VR.

[mariner]

Thanks for the kind reply, clsid.

1. With MPC-VR is use, MPC can now play 4K AV1 YT video at 60fps. 8K is still a struggle at single digit fps. LAV filter setting is as follows, correct?

Hardware Decoder: D3D11
Hardware Device: Automatic (Native)

2. LAV filter does not show up as MF decoder in DXVA Checker, but as unsupported under DS. 4K AV1 video playback can only reach 40fps. Does this look correct?

3. v0lt has a question about how to check playback frame rate when using w10 movies player. Any one?

Thanks and best regards,

[v0lt]

Originally Posted by mariner

3. v0lt has a question about how to check playback frame rate when using w10 movies player. Any one?

For Windows Media Player, you can use Fraps.

[mariner]

8K/60p AV1 HDR YT video: web browser testing with Iris XE Graphics

1. Chrome will play 8K AV1 video at 60p with some dropped frames, but maintaining A/V sync. Performance is somewhat erratic: seems to be most well behaved when PC first booted up, and increased dropped frames if played in full screen. Not clear if it is hardware related. Anyone?

2. Firefox would not serve up the the HDR AV1 version despite claiming otherwise. Anyone have any success with firefox?

Many thanks and best regards,

[littleD]

New 101.0 firefox has improvements:
AV1 codec parameters are now properly parsed in media support queries. This means that MediaCapabilities.decodingInfo(), HTMLMediaElement.canPlayType(), and MediaSource.isTypeSupported() will now accurately report support for playback for AV1 sources based on the provided codec parameters. MediaCapabilities.decodingInfo() will also use the information to accurately report on "efficient decoding" of AV1 videos. For more information, see bug 1757861.

Not sure if this resolves anything on YT side.

[mariner]

Thanks for the kind reply, littleD.
Tried 101.0, no good. Any hidden setting in about:config that needs to be turned on?
It seems the issue is not codec. PQ/HLG clips are not available on YT when using FF. Incompatibility issue?
FTWAI, Edge can do AV1/HDR at 4K/60p.
Many thanks and best regards,

[mariner]

Chrome 8K60p AV1 video.
Apologies for posting 4k screencap in earlier post.

[Yups]

https://twitter.com/hjc4869/status/1541721105949331457


Arc A380 by far the fastest hardware decoder, nothing comes close. I think the decoder might be the same as in TGL or ADL iGPUs but the clock speed is so much higher (2450 Mhz Arc vs 1100 Mhz TGL in this test), although I don't know if the video playback clock speed on Arc is the same as the 3d clock speed.

[nevcairiel]

At some point speed really stops mattering, unless you make a media processing server. Also its hilarious that they compared to AMD cards, the worst contender in the decode lottery.

[P.J]

Which one is better for AV1? RTX 3050 vs RX 6600?