DirectShow Graph File Format (Compact 2013)
3/26/2014
This topic describes the format of a saved DirectShow graph (.grf) file.
<graph> ::= <version3><filters><connections><clock>END | <version2><filters><connections>END
<version3> ::= 0003\r\n
<version2> ::= 0002\r\n
<clock> ::= CLOCK <b> <required><b><clockid>\r\n
<required> ::= 1|0
<clockid> ::= <n>|<class id>
<filters ::= FILTERS <b>[<filter list><b>]
<connections> ::= CONNECTIONS [<b> <connection list>]
<filter list> ::= [<filter> <b>] <filter list>
<connection list> ::= [<connection><b>]<connection list>
<filter> ::= <n><b>"<name>"<b><class id><b>[<file>]<length><b1><filter data>
<file> ::= SOURCE "<name>"<b> | SINK "<name>"<b>
<class id> ::= class id of the filter in standard string form
<name> ::= any sequence of characters NOT including "
<length> ::= character string representing unsigned decimal number, for example, 23
this is the number of bytes of data that follow the following space.
<b> ::= any combination of space, \t, \r, or \n
<b1> ::= exactly one space character
<n> ::= an identifier that will in fact be an integer, 0001, 0002, 0003, etc.
<connection> ::= <n1><b>"<pin1 id>"<b><n2><b>"<pin2 id>" <media type>
<n1> ::= identifier of first filter
<n2> ::= identifier of second filter
<pin1 id> ::= <name>
<pin2 id> ::= <name>
<media type> ::= <major type><b><sub type><b><flags><length><b1><format>
<major type> ::= <class id>
<sub type> ::= <class id>
<flags> ::= <FixedSizeSamples><b><TemporalCompression><b>
<FixedSizeSamples> ::= 1|0
<TemporalCompression> ::= 1|0
<Format> ::= <SampleSize><b><FormatType><b><FormatLength><b1><FormatData>
<FormatType> ::= class id of the format in standard string form
<FormatLength> ::= character string representing unsigned decimal number
this is the number of bytes of data that follow the following space.
<FormatData> ::= binary data