couldn't locate decompressor for format h264 unknown
If you get error like
Couldn't locate decompressor for format 'H264' (unknown)
This can be fixed by installing Ffdshow
You can download Ffdshow from
On 4 Feb 2011, the installation file name was 'ffdshow_rev3721_20110107_clsid.exe'
Windows 7 64 bit
Since i am using Windows 7 64 bit, i downloaded and installed 64 bit version of ffdshow
But VirtualDub still show same error.
This is fixed by installing VirtualDub 64 bit version.