Radeon RX 4XX/5XX standalone system, AMDRadeonX4250.kext (GVA support H264) does not support HEVC HW

[shuhung]

Add these 2 boot args would be simpler do you think? Mac-7BA5B2D9E42DDD94 is the board-id of iMacPro1,1:

shikigva=32 shiki-id=Mac-7BA5B2D9E42DDD94

Yes, should be same, not sure and not tested.

 

[justinhe]

Yes, should be same, not sure and not tested.

I used shikigva and shiki-id method, with dummy kext and 10.14.4

Encoding: no freeze on quicktime recording and exporting as hevc (high cpu load, i guess it uses software encoding, can you confirm this part?) or as h264 (very fast, low cpu load).

Decoding: Playing 4k 10bit 120Mbps hevc and h264 only 5% cpu load, hardware decoding worked great!

videoproc shows HEVC not available. (attached screenshot)

VDADecoderChecker result : Hardware acceleration is fully supported

Update: I renamed PEGP to GFX2 in clover for GPU PM purpose, now removed it, PEGP is GFX0 now, everything encoding decoding works, update videoproc screenshot.

 

[shuhung]

I used shikigva and shiki-id method, with dummy kext and 10.14.4

Encoding: no freeze on quicktime recording and exporting as hevc (high cpu load, i guess it uses software encoding, can you confirm this part?) or as h264 (very fast, low cpu load).

Decoding: Playing 4k 10bit 120Mbps hevc and h264 only 5% cpu load, hardware decoding worked great!

videoproc shows HEVC not available. (attached screenshot)

VDADecoderChecker result : Hardware acceleration is fully supported

Both AMD HEVC/H264 GVA encoder work and fast, for HEVC encoding, recently only support 8 bit.

Forget to attach result, HEVC transcoding FCPX to Compressor

 

[justinhe]

Both AMD HEVC/H264 GVA encoder work and fast, for HEVC encoding, recently only support 8 bit.

how do i know if it is 8 bit from quicktime exporting? still don't understand why videoproc shows HEVC not available

 

[shuhung]

how do i know if it is 8 bit from quicktime exporting? still don't understand why videoproc shows HEVC not available

I don't use QT for HEVC transcoding, VideoProc show both HEVC and H264 available for me, RX460 and RX570 both OK.

 

[justinhe]

I don't use QT for HEVC transcoding, VideoProc show both HEVC and H264 available for me, RX460 and RX570 both OK.

Maybe that's because you got iGPU? i don't have iGPU.

 

[shuhung]

Maybe that's because you got iGPU? i don't have iGPU.

No, I don't enable IQSV, for HEVC transcoding RX460/RX570 are much better, no reason to enable IGPU for me.

 

[justinhe]

Both AMD HEVC/H264 GVA encoder work and fast, for HEVC encoding, recently only support 8 bit.

Forget to attach result, HEVC transcoding FCPX to Compressor

Sorry it was my fault, i did rename PEGP to GFX2 in clover, removed that line, now my GPU is GFX0. everything works. Great thanks for your help.

 

[shuhung]

Sorry it was my fault, i did rename PEGP to GFX2 in clover, removed that line, now my GPU is GFX0. everything works. Great thanks for your help.

 

[justinhe]

Looks like Apple finally figured out how to take advantage of AMD GPU multimedia encoding and decoding features.