MPEG-1 Media Types
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
This section lists the media types used for MPEG-1 data.
MPEG-1 System Stream
| Label | Value |
|---|---|
| Major type | MEDIATYPE_Stream |
| Subtype | MEDIASUBTYPE_MPEG1System |
| Format Type | FORMAT_MPEGStreams |
| Format Structure | AM_MPEGSYSTEMTYPE |
| Media Sample Contents | Byte stream; no alignment |
MPEG-1 System Stream from Video CD
| Label | Value |
|---|---|
| Major type | MEDIATYPE_Stream |
| Subtype | MEDIASUBTYPE_MPEG1VideoCD |
| Format Type | GUID_NULL |
| Format Structure | None |
| Media Sample Contents | Byte stream; no alignment. |
MPEG-1 Audio Packet
| Label | Value |
|---|---|
| Major type | MEDIATYPE_Audio |
| Subtype | MEDIASUBTYPE_MPEG1Packet |
| Format Type | FORMAT_WaveFormatEx |
| Format Structure | MPEG1WAVEFORMAT |
| Media Sample Contents | Single MPEG-1 packet, including packet header. |
MPEG-1 Audio Payload
| Label | Value |
|---|---|
| Major type | MEDIATYPE_Audio |
| Subtype | MEDIASUBTYPE_MPEG1Payload |
| Format Type | FORMAT_WaveFormatEx |
| Format Structure | MPEG1WAVEFORMAT |
| Media Sample Contents | Byte-aligned MPEG-1 audio data. |
MPEG-1 Video Packet
| Label | Value |
|---|---|
| Major type | MEDIATYPE_Video |
| Subtype | MEDIASUBTYPE_MPEG1Packet |
| Format Type | FORMAT_MPEGVideo |
| Format Structure | MPEG1VIDEOINFO |
| Media Sample Contents | Single MPEG-1 packet, including packet header. |
MPEG-1 Video payload
| Label | Value |
|---|---|
| Major type | MEDIATYPE_Video |
| Subtype | MEDIASUBTYPE_MPEG1Payload |
| Format Type | FORMAT_MPEGVideo |
| Format Structure | MPEG1VIDEOINFO |
| Media Sample Contents | Byte-aligned MPEG-1 video data. |
MPEG-1 Native Video Stream
| Label | Value |
|---|---|
| Major type | MEDIATYPE_Stream |
| Subtype | MEDIASUBTYPE_ MPEG1Video |
| Format Type | GUID_NULL |
| Format Structure | None |
| Media Sample Contents | Array of video stream bytes (no system layer). |
MPEG-1 Native Audio Stream
| Label | Value |
|---|---|
| Major type | MEDIATYPE_Stream |
| Subtype | MEDIASUBTYPE_ MPEG1Audio |
| Format Type | GUID_NULL |
| Format Structure | None |
| Media Sample Contents | Array of audio stream bytes (no system layer). |
Remarks
The DirectShow MPEG-1 filters support these types as follows.
| Filter | Direction | Supported media types |
|---|---|---|
| MPEG-1 Splitter | Input | MPEG-1 system streamMPEG-1 system stream from Video CD |
| MPEG-1 Splitter | Output | MPEG-1 Audio packetMPEG-1 Audio payload MPEG-1 Video packet MPEG-1 Video payload |
| Software Audio Codec | Input | MPEG-1 Audio packetMPEG-1 Audio payload |
| Software Video Codec | Input | MPEG-1 Video packetMPEG-1 Video payload |
| Software Audio Codec | Output | PCM audio |
| Software Video Codec | Output | Uncompressed video (Y41P, YUY2, UYVY, RGB-24, RGB-32, RGB-565, RGB-555, RGB-8) |
MPEG-1 Video packet and payload media types contain a complete sequence header so that data can be played from the middle of a file without needing a sequence header to initialize the video playback.
The video sequence header is appended to the video data type for MPEG video so that play can begin from the middle of a stream. The length of this field is up to 140 bytes; it includes the sequence header start code (0x000001B3) at the start, along with any quantization matrices found in the first sequence header encountered.