WMV plugin

Change Log started October 2007
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Version 2.8 (February 18, 2012)

• Fixed a crash in the audio read function.

Version 2.7 (February 12, 2012)

• Fixed a bug in the handling of replicated data length zero.

Version 2.6 (September 10, 2011)

• Removed a fatal error which appeared when replicated data length is zero.

Version 2.5 (March 13, 2011)

• The File Information dialog now displays all audio streams, and includes audio language information if available.

Version 2.4 (February 25, 2011)

• Fixed the name of the video codec in the File Information dialog.

Version 2.3 (February 13, 2011)

• Major rework of project, primarily to improve audio/video sync.

Version 2.2 (February 5, 2011)

• Fixed corrupted (blocky) decoding seen in some streams.

Version 2.1 (December 25, 2010)

• Fixed the decoding of AVC video streams in Windows Media Format.

Version 2.0 (February 13, 2010)

• The previous version causes VirtualDub's window to lose focus after parsing is finished. This build should fix that.

Version 1.9 (February 13, 2010)

• Fixed a crash which happens when you close VirtualDub's main window while the WMV plugin is parsing a file.

Version 1.8 (January 17, 2010)

• I've ported the code to Visual Studio 2005 and added a new (untested) 64-bit build. Installation instructions are in ReadMe.txt.

• I've switched to using 7-Zip to archive the source code package.

Version 1.7 (July 11, 2008)

• Fixed a problem which happens when a WMV has a preroll value greater than the earliest time stamp value. The symptom was a large group of "D" frames (duplicates) at the beginning and some broken frames immediately after that.

Version 1.6 (June 30, 2008)

• The error "Dub/IO-Video error: buffer too small (80044074)" would sometimes appear when saving an AVI file. That is fixed now.

Version 1.5 (May 16, 2008)

• I recently discovered that support for WMA (audio only) files was broken. It is fixed now.

Version 1.4 (October 27, 2007)

• I've added improved support for variable frame rate (VFR) video, which is not uncommon in WMV files.

Version 1.3 (October 12, 2007)

• I've done some major restructuring of the code, but that's mostly invisible to the end user. One change you will see is that the plugin now supports ASF files which don't contain video, but do contain audio. Therefore I've added "*.wma" to the list of supported extensions.

• Fixed a bug which prevented closing the Info dialog with the [X] button.

• Known bugs: Output playback stutters badly with some files.

Version 1.2 (October 8, 2007)

• Fixed a hanging problem in filter preview with the current test build of VirtualDub 1.7.6.

• Fixed a bug which caused the plugin to fail on Windows 98.

Version 1.1 (October 7, 2007)

• VBR audio sync is much better now with VirtualDub 1.7.6 test4.

• Fixed a crash when no video codec is found, and updated the "WMV Information" dialog to show more info about the video and audio codecs needed.

Version 1.0 (October 7, 2007)

This is the first release of my new WMV plugin for VirtualDub version 1.7.2 and later. The following are known issues:

• There are no decompressors in the plugin itself. You must have the proper codecs installed on your system to decompress the video and audio streams.

• When seeking to a random position and starting playback, you may see "Error code 512: (ACMERR_NOTPOSSIBLE)". To work around this, seek to a different position and try again.

• Audio sync may not be perfect if the WMV file has a VBR audio track.