What is VirtualDub?

VirtualDub is a video capture/processing utility for 32-bit and 64-bit Windows platforms (98/ME/NT4/2000/XP/Vista/7), licensed under the GNU General Public License (GPL).  It lacks the editing power of a general-purpose editor such as Adobe Premiere, but is streamlined for fast linear operations over video.  It has batch-processing capabilities for processing large numbers of files and can be extended with third-party video filters.  VirtualDub is mainly geared toward processing AVI files, although it can read (not write) MPEG-1 and also handle sets of BMP images.

I basically started VirtualDub in college to do some quick capture-and-encoding that I wanted done; from there it's basically grown into a more general utility that can trim and clean up video before exporting to tape or processing with another program.  I released it on the web and others found it useful, so I've been tinkering around with its code ever since.  If you have the time, please download and enjoy.

§ ¶Wat

Visual Studio 2005 has an amusing description of the /SWAPRUN:NET linker option:

Presumably, a poor soul in charge of the help text was told "go document this" without proper backup.

It seems this was noticed and corrected by the time Visual Studio 2010 was released:

Well, except that the part about it being a feature of Windows NT 4.0 is superfluous as VS2010-built executables require Windows XP SP2... but that one we can let slide....

§ ¶Another common controls V6 bug

Here is a stack trace of a Win32 program being debugged under WinDbg. Can you guess what the bug is from this stack trace?

0:000> kb
ChildEBP RetAddr  Args to Child             
0018f470 70582d28 00000000 00000000 00000001 USER32!NtUserInvalidateRect+0x1
0018f48c 7054ff2f 069faf50 00000000 00000004 COMCTL32!Tab_OnHScroll+0x4e
0018f4cc 705284ec 069faf50 00000001 0018f524 COMCTL32!Tab_UpdateArrows+0xe4
0018f4dc 705284cb 069faf50 00000000 7052723b COMCTL32!Tab_Size+0x17
0018f524 766362fa 00a6096a 00000005 00000000 COMCTL32!Tab_WndProc+0x18f
0018f550 76636d3a 7052723b 00a6096a 00000005 USER32!InternalCallWinProc+0x23
0018f5c8 766390c9 00000000 7052723b 00a6096a USER32!UserCallWinProcCheckWow+0x109
0018f658 76636a8c 05569460 00000000 7052723b USER32!RealDefWindowProcWorker+0x622
0018f678 76636ae9 00a6096a 00000047 00000000 USER32!RealDefWindowProcW+0x4a
0018f6c0 7052734c 00a6096a 00000047 00000000 USER32!DefWindowProcW+0x6f
0018f714 766362fa 00a6096a 00000047 00000000 COMCTL32!Tab_WndProc+0x399
0018f740 76636d3a 7052723b 00a6096a 00000047 USER32!InternalCallWinProc+0x23
0018f7b8 76636de8 00000000 7052723b 00a6096a USER32!UserCallWinProcCheckWow+0x109
0018f814 76638fa7 05569460 00000000 00000047 USER32!DispatchClientMessage+0xe0
0018f850 7793010a 0018f868 00000000 0018f9c4 USER32!__fnINLPWINDOWPOS+0x2c
0018f864 05569460 00000000 00000047 00000000 ntdll!KiUserCallbackDispatcher+0x2e