couldn't locate decompressor for format h264 unknown

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Install Codec

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.