Greetings from H.265 / HEVC Video Decoder Media Foundation Transform

H.265 / HEVC Video Decoder Media Foundation has been around for a while, but using Media Foundation overall one step off straightforward basic paths is like walking a minefield.

A twenty-liner below hits memory access violation inside IMFTransform::GetInputStreamInfo “Exception thrown at 0x6D1E71E7 (hevcdecoder.dll) in MfHevcDecoder01.exe: 0xC0000005: Access violation reading location 0x00000000.”:

#include "stdafx.h"
#include <mfapi.h>
#include <mftransform.h>
#include <wmcodecdsp.h>
#include <atlbase.h>
#include <atlcom.h>

#pragma comment(lib, "mfplat.lib")
#pragma comment(lib, "mfuuid.lib")
#pragma comment(lib, "wmcodecdspuuid.lib")

int main()
{
    ATLVERIFY(SUCCEEDED(CoInitialize(NULL)));
    ATLVERIFY(SUCCEEDED(MFStartup(MF_VERSION)));
    CComPtr<IMFTransform> pTransform;
#if 1
    static const MFT_REGISTER_TYPE_INFO InputTypeInformation = { MFMediaType_Video, MFVideoFormat_HEVC };
    IMFActivate** ppActivates;
    UINT32 nActivateCount = 0;
    ATLVERIFY(SUCCEEDED(MFTEnumEx(MFT_CATEGORY_VIDEO_DECODER, 0, &InputTypeInformation, NULL, &ppActivates, &nActivateCount)));
    ATLASSERT(nActivateCount > 0);
    ATLVERIFY(SUCCEEDED(ppActivates[0]->ActivateObject(__uuidof(IMFTransform), (VOID**) &pTransform)));
#else
    ATLVERIFY(SUCCEEDED(pTransform.CoCreateInstance(CLSID_CMSH265EncoderMFT)));
#endif
    MFT_INPUT_STREAM_INFO InputInformation;
    ATLVERIFY(SUCCEEDED(pTransform->GetInputStreamInfo(0, &InputInformation)));
    return 0;
}

Interestingly, alternative path around IMFActivate (see #if above) seems to be working fine.

 

AMD started offering hardware H.265/HEVC video encoder for Media Foundation

It should be good news for those interested in hardware assisted video encoding as AMD extends offering in their new hardware and offers H.265 encoder in already well-known form factor: as a Microsoft Media Foundation Transform “AMDh265Encoder”:

# System

* Version: 10.0.14393, Windows 10, VER_SUITE_SINGLEUSERTS, VER_NT_WORKSTATION
* Product: PRODUCT_PROFESSIONAL

[…]

# Display Devices

* AMD Radeon (TM) RX 480
* Instance: PCI\VEN_1002&DEV_67DF&SUBSYS_0B371002&REV_C7\4&2D78AB8F&0&0008
* DEVPKEY_Device_Manufacturer: Advanced Micro Devices, Inc.
* DEVPKEY_Device_DriverVersion: 21.19.137.514

[…]

# Category `MFT_CATEGORY_VIDEO_ENCODER`

[…]

## AMDh265Encoder

15 Attributes:

* MFT_TRANSFORM_CLSID_Attribute: {5FD65104-A924-4835-AB71-09A223E3E37B} (Type VT_CLSID)
* MF_TRANSFORM_FLAGS_Attribute: MFT_ENUM_FLAG_HARDWARE
* MFT_ENUM_HARDWARE_VENDOR_ID_Attribute: VEN_1002 (Type VT_LPWSTR)
* MFT_ENUM_HARDWARE_URL_Attribute: AMDh265Encoder (Type VT_LPWSTR)
* MFT_INPUT_TYPES_Attributes: MFVideoFormat_NV12, MFVideoFormat_ARGB32
* MFT_OUTPUT_TYPES_Attributes: MFVideoFormat_HEVC
* MFT_CODEC_MERIT_Attribute: 8 (Type VT_UI4)
* MFT_SUPPORT_DYNAMIC_FORMAT_CHANGE: 1 (Type VT_UI4)
* MF_TRANSFORM_ASYNC: 1 (Type VT_UI4)
* MF_SA_D3D11_AWARE: 1 (Type VT_UI4)
* MF_SA_D3D_AWARE: 1 (Type VT_UI4)
* MF_TRANSFORM_ASYNC_UNLOCK: 0 (Type VT_UI4)
* MFT_GFX_DRIVER_VERSION_ID_Attribute: 1.2.3.4

This follows Intel’s H.265/HEVC hardware compression offering also available in MFT form factor:

## IntelĀ® Hardware H265 Encoder MFT

12 Attributes:

* MFT_TRANSFORM_CLSID_Attribute: {BC10864D-2B34-408F-912A-102B1B867B6C} (Type VT_CLSID)
* MF_TRANSFORM_FLAGS_Attribute: MFT_ENUM_FLAG_HARDWARE
* MFT_ENUM_HARDWARE_VENDOR_ID_Attribute: VEN_8086 (Type VT_LPWSTR)
* MFT_ENUM_HARDWARE_URL_Attribute: AA243E5D-2F73-48c7-97F7-F6FA17651651 (Type VT_LPWSTR)
* MFT_INPUT_TYPES_Attributes: {3231564E-3961-42AE-BA67-FF47CCC13EED}, MFVideoFormat_NV12, MFVideoFormat_ARGB32
* MFT_OUTPUT_TYPES_Attributes: MFVideoFormat_HEVC
* MFT_CODEC_MERIT_Attribute: 7 (Type VT_UI4)
* MFT_SUPPORT_DYNAMIC_FORMAT_CHANGE: 1 (Type VT_UI4)
* MF_TRANSFORM_ASYNC: 1 (Type VT_UI4)
* MFT_GFX_DRIVER_VERSION_ID_Attribute: 0.0.0.3