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xRobert Richmond

Windows Media: Converting and Editing Files

February 2003

Page Two

Page One: Introduction / GraphEdit to the Rescue
Page Two: Simple AVI Conversion
Page Three: Creating an AVI for Editing

Simple AVI Conversion

GraphEdit works through the manual connection of media filters through a graphic interface. Once downloaded and installed according to any accompanying documenation, GraphEdit needs to be configured to intelligently connect media filters by selecting the menu option "Graph", then clicking "Connect Intelligent". Once configured, the actual graph building process can begin with the loading of the "Windows Media Source filter". Filters are loaded by selecting "Graph", then "Insert Filters". The desired source filter is available under the DirectShow filters section. Simply select the filter, then click "Insert Filter". A new dialog interface will open asking for the input source file. This can be any WMV, WMA, or ASF Windows Media file. The file "c:\testclip.wmv" will be used for this example. The source file has been encoded with Windows Media Video and Audio version 8.

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Now that the source is loaded in GraphEdit, the content must either be copied or transposed into a new editable container format, such as the AVI standard. The simplest method is to load DirectShow "AVI Mux" and then connect the pins from the source. With intelligent linking, GraphEdit will insert the proper intermedia filters required for the connection to be processed.

AVI Mux combines multiple audio and video streams into one AVI file container. The ASF ACM filter is required in this case. The AVI stream then can be output using the DirectShow "File writer" filter. Simply designate an output file name, such as "c:\ testfile.avi", and then click the green playback button within the top menu to complete the process. The file can now be played back with Windows Media Player v7/8/9, or popular third-party applications like ZoomPlayer or Media Player Classic.

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