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MF_MT_AUDIO_NUM_CHANNELS attribute (Mfapi.h) - …
https://docs.microsoft.com/en-us/windows/win32/medfound/mf-mt-audio-num-channels-attribute
In this article. Number of audio channels in an audio media type. Data type. UINT32. Remarks. This attribute corresponds to the nChannels member of the WAVEFORMATEX structure.. The GUID constant for this attribute is exported from mfuuid.lib.
MF_MT_AUDIO_BITS_PER_SAMPLE attribute (Mfapi.h) - …
https://docs.microsoft.com/en-us/windows/win32/medfound/mf-mt-audio-bits-per-sample-attribute
If some bits contain padding, set the MF_MT_AUDIO_VALID_BITS_PER_SAMPLEattribute to specify the number of bits of valid audio data in each sample. If the audio contains 8 bits per sample, the audio samples are unsigned values. (Each audio sample has the range 0–255.) If the audio contains 16 bits per sample or …
MF_MT_AUDIO_BLOCK_ALIGNMENT attribute (Mfapi.h) - …
https://docs.microsoft.com/en-us/windows/win32/medfound/mf-mt-audio-block-alignment-attribute
Block alignment, in bytes, for an audio media type. The block alignment is the minimum atomic unit of data for the audio format. MF_MT_AUDIO_BLOCK_ALIGNMENT attribute (Mfapi.h) - Win32 apps | Microsoft Docs
Uncompressed Audio Media Types - Win32 apps | …
https://docs.microsoft.com/en-us/windows/win32/medfound/uncompressed-audio-media-types
MF_MT_AUDIO_SAMPLES_PER_SECOND can't dynamic chage
https://social.msdn.microsoft.com/Forums/windowsdesktop/en-US/4f5ab7be-eecf-42a8-b64b-67d629037ca4/mfmtaudiosamplespersecond-cant-dynamic-chage
But it should be pretty easy to do the dynamic format changes you want to do in audio: Put a resampler MFT in your topology just upstream of the output node for the audio renderer. Vista has an audio resampler availabler which you can get to through MFTEnum (category=MFT_CATEGORY_AUDIO_EFFECT). This MFT will handle a changing input type. Becky
c++ - MF_MT_AUDIO_BITS_PER_SAMPLE Always Returns …
https://stackoverflow.com/questions/68389611/mf-mt-audio-bits-per-sample-always-returns-zero-for-pcm-audio
MF_MT_AUDIO_BITS_PER_SAMPLE is applicable to media types only, not to samples.. MF_MT_AUDIO_BITS_PER_SAMPLE is not available for every media type, only for those where it is applicable. If you can't query the value then most likely it does not make much sense for this media type.
Windows-classic-samples/PropertyView.cpp at main ...
https://github.com/microsoft/Windows-classic-samples/blob/main/Samples/Win7Samples/multimedia/mediafoundation/topoedit/tedutil/PropertyView.cpp
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win32/mpeg-4-file-source.md at docs - GitHub
https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src/medfound/mpeg-4-file-source.md
Audio: MFAudioFormat_PCM: 16-bit big-endian PCM audio: The MPEG-4 file source converts the audio data to little-endian format. 'ulaw' Audio: WAVE_FORMAT_MULAW: μ-law coding 'vc-1' Video: MFVideoFormat_WVC1: VC-1 video 'NONE' Audio: MFAudioFormat_PCM: 8-bit or 16-bit big-endian PCM audio: The MPEG-4 file source converts the audio data to little-endian format. …
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