Alternatively, install individual VFW codecs such as for H.264 support or ffdshow , ensuring the VFW interface is enabled in the configuration settings. Verify Configuration :

If using specific codecs like PICVideo MJPEG, try unchecking as this can sometimes block initialization. Use VirtualDub2 :

: VirtualDub requires specific Video for Windows (VFW) compatible codecs to function. Standard DirectShow codecs used by modern players like Windows Media Player are often incompatible.