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Merge pull request #3266 from MicrosoftDocs/drewbat/uuf-491551-undocumented-mf-constants
Adding reference pages for undocumented previously released MF attrib…
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‎desktop-src/medfound/alphabetical-list-of-media-foundation-attributes.md‎

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| [MF\_MP2DLNA\_STATISTICS](mf-mp2dlna-statistics.md) | Gets statistics from the DLNA media sink. |
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| [MF\_MP2DLNA\_USE\_MMCSS](mf-mp2dlna-use-mmcss.md) | Specifies whether the DLNA media sink uses the Multimedia Class Scheduler Service (MMCSS) |
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| [MF\_MP2DLNA\_VIDEO\_BIT\_RATE](mf-mp2dlna-video-bit-rate.md) | Specifies the maximum video bit rate for the DLNA media sink. |
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| [MF\_MPEG4SINK\_MAX\_CODED\_SEQUENCES\_PER\_FRAGMENT](mf-mpeg4sink-minimum-properties-size.md) | Specifies the maximum number of coded sequences which the MPEG4 sink will place in each fragment when operating in fragmented mode. |
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| [MF\_MPEG4SINK\_MIN\_FRAGMENT\_DURATION](mf-mpeg4sink-min-fragment-duration.md) | Specifies the minimum duration in hns of each fragment which the MPEG4 sink produces when operating in fragmented mode. |
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| [MF\_MPEG4SINK\_MINIMUM\_PROPERTIES\_SIZE](mf-mpeg4sink-minimum-properties-size.md) | Tells the MPEG-4 MediaSink how much space to reserve in the MP4 file format header for metadata properties. |
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| [MF\_MPEG4SINK\_MOOV\_BEFORE\_MDAT](mf-mpeg4sink-moov-before-mdat.md) | Indicates that 'moov' will be written before 'mdat' box in the generated file. |
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| [MF\_MPEG4SINK\_SPSPPS\_PASSTHROUGH](mf-mpeg4sink-spspps-passthrough.md) | Specifies whether the [**MPEG-4 File Sink**](mpeg-4-file-sink.md) filters out sequence parameter set (SPS) and picture parameter set (PPS) NALUs. |
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| [MF\_MSE\_ACTIVELIST\_CALLBACK](mf-mse-activelist-callback.md) | Contains a pointer to the application's callback interface for the [**IMFBufferListNotify**](/windows/desktop/api/mfmediaengine/nn-mfmediaengine-imfbufferlistnotify) interface for the active buffer list. |

‎desktop-src/medfound/mf-mpeg4sink-max-coded-sequences-per-fragment.md‎

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---
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description: Specifies the maximum number of coded sequences which the MPEG4 sink will place in each fragment when operating in fragmented mode.
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title: MF_MPEG4SINK_MAX_CODED_SEQUENCES_PER_FRAGMENT attribute (Mfidl.h)
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ms.topic: reference
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ms.date: 10/31/2025
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---
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# MF\_MPEG4SINK\_MAX\_CODED\_SEQUENCES\_PER\_FRAGMENT attribute
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Specifies the maximum number of coded sequences which the MPEG4 sink will place in each fragment when operating in fragmented mode.
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## Data type
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**UINT32**
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## Remarks
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A coded sequence is a group of [IMFSample](/windows/win32/api/mfobjects/nn-mfobjects-imfsample) objects where the first **IMFSample** has the non-zero value for the [MFSampleExtension_CleanPoint](mfsampleextension-cleanpoint-attribute.md) attribute, followed by zero or more **IMFSamples** that have a zero value, or no value, for the **MFSampleExtension_CleanPoint** attribute.
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## Requirements
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| Requirement | Value |
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|-------------------------------------|------------------------------------------------------------------------------------|
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| Minimum supported client | Windows 10 version 1709 |
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| Minimum supported server | Windows Server version 1709 |
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| Header | Mfidl.h |
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## See also
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<dl> <dt>
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[Alphabetical List of Media Foundation Attributes](alphabetical-list-of-media-foundation-attributes.md)
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</dt> <dt>
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[Media Type Attributes](media-type-attributes.md)
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</dt> </dl>
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‎desktop-src/medfound/mf-mpeg4sink-min-fragment-duration.md‎

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---
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description: Specifies the minimum duration in hns of each fragment which the MPEG4 sink produces when operating in fragmented mode.
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title: MF_MPEG4SINK_MIN_FRAGMENT_DURATION attribute (Mfidl.h)
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ms.topic: reference
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ms.date: 10/31/2025
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---
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# MF\_MPEG4SINK\_MIN\_FRAGMENT\_DURATIONT attribute
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Specifies the minimum duration in hns of each fragment which the MPEG4 sink produces when operating in fragmented mode.
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## Data type
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**UINT64**
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## Remarks
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If this attribute is set, the [MF_MPEG4SINK_MAX_CODED_SEQUENCES_PER_FRAGMENT](mf-mpeg4sink-max-coded-sequences-per-fragment.md) attribute is ignored.
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## Requirements
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| Requirement | Value |
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|-------------------------------------|------------------------------------------------------------------------------------|
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| Minimum supported client | Windows 10 version 1709 |
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| Minimum supported server | Windows Server version 1709 |
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| Header | Mfidl.h |
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## See also
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<dl> <dt>
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[Alphabetical List of Media Foundation Attributes](alphabetical-list-of-media-foundation-attributes.md)
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</dt> <dt>
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[Media Type Attributes](media-type-attributes.md)
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</dt> </dl>
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‎desktop-src/medfound/mf-mpeg4sink-minimum-properties-size.md‎

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---
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description: Tells the MPEG-4 MediaSink how much space to reserve in the MP4 file format header for metadata properties.
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title: MF_MPEG4SINK_MINIMUM_PROPERTIES_SIZE attribute (Mfidl.h)
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ms.topic: reference
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ms.date: 10/31/2025
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---
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# MF\_MPEG4SINK\_MINIMUM\_PROPERTIES\_SIZE attribute
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Tells the MPEG-4 MediaSink how much space to reserve in the MP4 file format header for metadata properties.
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## Data type
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**UINT32**
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## Remarks
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The default behavior of the MPEG-4 media sink is to only use exactly the amount of storage required to hold only the current metadata properties in the MP4 file header plus required padding. When this attribute is specified, the media sink reserves the specified amount of storage (in bytes) for properties. If the properties are updated later, or if new properties are added, the media sink will attempt to update the file in-place by writing the properties into the previously reserved space.
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## Requirements
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| Requirement | Value |
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|-------------------------------------|------------------------------------------------------------------------------------|
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| Minimum supported client | Windows 10 version 1709 |
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| Minimum supported server | Windows Server version 1709 |
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| Header | Mfidl.h |
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## See also
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<dl> <dt>
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[Alphabetical List of Media Foundation Attributes](alphabetical-list-of-media-foundation-attributes.md)
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</dt> <dt>
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[Media Type Attributes](media-type-attributes.md)
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</dt> </dl>
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‎desktop-src/medfound/toc.yml‎

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href: mf-mp2dlna-use-mmcss.md
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- name: "MF_MP2DLNA_VIDEO_BIT_RATE"
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href: mf-mp2dlna-video-bit-rate.md
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- name: "MF_MPEG4SINK_MAX_CODED_SEQUENCES_PER_FRAGMENT"
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href: mf-mpeg4sink-max-coded-sequences-per-fragment.md
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- name: "MF_MPEG4SINK_MIN_FRAGMENT_DURATION"
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href: mf-mpeg4sink-min-fragment-duration.md
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- name: "MF_MPEG4SINK_MINIMUM_PROPERTIES_SIZE"
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href: mf-mpeg4sink-minimum-properties-size.md
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- name: "MF_MPEG4SINK_MOOV_BEFORE_MDAT"
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href: mf-mpeg4sink-moov-before-mdat.md
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- name: "MF_MPEG4SINK_SPSPPS_PASSTHROUGH"

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