Hi guys,
I'm now trying to use MP3 encoder mft on Win10 pro Insider preview, but failed to set output media type.
Below is my code:
// Fill in MPEGLAYER3WAVEFORMAT data MPEGLAYER3WAVEFORMAT mp3wfx; ZeroMemory(&mp3wfx, sizeof(mp3wfx)); mp3wfx.wID = MPEGLAYER3_ID_MPEG; mp3wfx.fdwFlags = 2; // no padding mp3wfx.nBlockSize = int16_t(144 * (128000 / 44100)); // bitrate = 128000kbps mp3wfx.nFramesPerBlock = 1; mp3wfx.nCodecDelay = 0; mp3wfx.wfx.wFormatTag = WAVE_FORMAT_MPEGLAYER3; // MP3 mp3wfx.wfx.nChannels = 2; mp3wfx.wfx.nSamplesPerSec = 44100; mp3wfx.wfx.wBitsPerSample = 16; mp3wfx.wfx.nBlockAlign = (mp3wfx.wfx.nChannels * mp3wfx.wfx.wBitsPerSample) / 8; mp3wfx.wfx.nAvgBytesPerSec = mp3wfx.wfx.nSamplesPerSec * mp3wfx.wfx.nBlockAlign; mp3wfx.wfx.cbSize = sizeof(MPEGLAYER3WAVEFORMAT) - sizeof(WAVEFORMATEX); // 12
LComObject<IMFMediaType> ciOutputType; // Output media type of the encoder hr = fpMFCreateMediaType((IMFMediaType**)(ciOutputType.GetAssignablePtrRef())); hr = fpMFInitMediaTypeFromWaveFormatEx(ciOutputType.get(), &(mp3wfx.wfx), sizeof(WAVEFORMATEX));
please ignore the wrappers I have on those COM objects/interfaces.
fpMFInitMediaTypeFromWaveFormatEx returns an error (hr = E_INVALIDARG One or more arguments are invalid).
Mftrace output these
2888,21C 04:28:58.37011 CMFPlatExportDetours::MFTEnumEx @ Category: MFT_CATEGORY_AUDIO_ENCODER, Flags: 0x00000001, input MT: <NULL>, output MT: MF_MT_MAJOR_TYPE=MEDIATYPE_Audio;MF_MT_SUBTYPE=MFAudioFormat_MP3
2888,21C 04:28:58.37058 CMFAttributesDetours::GetUINT32 @0361DD08 attribute not found guidKey = MFT_CODEC_MERIT_Attribute
2888,21C 04:28:58.37071 CMFAttributesDetours::GetUINT32 @0361DE88 attribute not found guidKey = MFT_CODEC_MERIT_Attribute
2888,21C 04:28:58.37086 CMFAttributesDetours::GetUINT32 @0361DB08 attribute not found guidKey = MFT_CODEC_MERIT_Attribute
2888,21C 04:28:58.37096 CMFAttributesDetours::GetUINT32 @0361DB88 attribute not found guidKey = MFT_CODEC_MERIT_Attribute
2888,21C 04:28:58.37106 CMFAttributesDetours::GetUINT32 @0361DB88 attribute not found guidKey = MFT_CODEC_MERIT_Attribute
2888,21C 04:28:58.37117 CMFAttributesDetours::GetUINT32 @0361DD08 attribute not found guidKey = MFT_CODEC_MERIT_Attribute
2888,21C 04:28:58.37127 CMFAttributesDetours::GetUINT32 @0361DD48 attribute not found guidKey = MFT_CODEC_MERIT_Attribute
2888,21C 04:28:58.37138 CMFAttributesDetours::GetUINT32 @0361DC88 attribute not found guidKey = MFT_CODEC_MERIT_Attribute
2888,21C 04:28:58.37148 CMFAttributesDetours::GetUINT32 @0361DD48 attribute not found guidKey = MFT_CODEC_MERIT_Attribute
2888,21C 04:28:58.37158 CMFAttributesDetours::GetUINT32 @0361DB48 attribute not found guidKey = MFT_CODEC_MERIT_Attribute
2888,21C 04:28:58.37167 CMFPlatExportDetours::MFTEnumEx @ Activate 00 @035FBF70, MFT_FRIENDLY_NAME_Attribute=MP3 Encoder ACM Wrapper MFT;MFT_INPUT_TYPES_Attributes=61 75 64 73 00 00 10 00 80 00 00 aa 00 38 9b 71 01 00 00 00 00 00 10 00 80 00 00 aa 00 38 9b 71 ;MFT_TRANSFORM_CLSID_Attribute={11103421-354C-4CCA-A7A3-1AFF9A5B6701};MFT_OUTPUT_TYPES_Attributes=61 75 64 73 00 00 10 00 80 00 00 aa 00 38 9b 71 55 00 00 00 00 00 10 00 80 00 00 aa 00 38 9b 71 ;MF_TRANSFORM_FLAGS_Attribute=1;MF_TRANSFORM_CATEGORY_Attribute=MFT_CATEGORY_AUDIO_ENCODER
2888,21C 04:28:58.37361 COle32ExportDetours::CoCreateInstance @ New MFT @0145D430, <NULL>
2888,21C 04:28:58.37363 COle32ExportDetours::CoCreateInstance @ Created {11103421-354C-4CCA-A7A3-1AFF9A5B6701} MP3 ACM Wrapper MFT (C:\Windows\System32\mfcore.dll) @0145D430 - traced interfaces: IMFTransform @0145D430,
2888,21C 04:28:58.37432 CMFTransformDetours::SetOutputType @0145D430 Failed MT: Thanks for help