MF_PD_ASF_FILEPROPERTIES_FLAGS attribute
Specifies whether an Advanced Systems Format (ASF) file is broadcast or seekable. This value corresponds to the Flags field of the File Properties Object, defined in the ASF specification.
Data type
UINT32
Remarks
This attribute applies to presentation descriptors for ASF content. The value of the attribute is a bitwise OR of the following flags:
| Flag | Description |
|---|---|
| 0x01 | Broadcast flag. The file is in the process of being created. |
| 0x02 | Seekable flag. The file is seekable. A file is seekable if an audio stream is present and the maximum data packet size equals the minimum data packet size. It can also be seekable if the file has an audio stream and a video stream with a matching Simple Index Object. |
The IMFASFContentInfo::GeneratePresentationDescriptor method generates this attribute from the ASF metadata.
If the broadcast flag is set, the following attributes in the presentation descriptor are not valid:
- MF_PD_ASF_FILEPROPERTIES_FILE_ID
- MF_PD_ASF_FILEPROPERTIES_CREATION_TIME
- MF_PD_ASF_FILEPROPERTIES_PACKETS
- MF_PD_ASF_FILEPROPERTIES_PLAY_DURATION
- MF_PD_ASF_FILEPROPERTIES_SEND_DURATION
In addition, the MF_PD_ASF_FILEPROPERTIES_MAX_PACKET_SIZE attribute and MF_PD_ASF_FILEPROPERTIES_MIN_PACKET_SIZE attribute values are set to the actual packet size.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista [desktop apps only] |
| Minimum supported server |
Windows Server 2008 [desktop apps only] |
| Header |
|
See also
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