Of course inline! Actually you can remove the masking for the 24 bit shifts. For the inner two bytes I don't see an improvement. Thanks Gary for the follow up :) Jürgen Eidt http://cpicture.de/en

Thanks for your suggestion. I just wanted to give the icons in my listview a small preview of the AVI files from my camera :) Wouldn't introducing DirectShow to an app make a dependency on the DirectShow components installed on the system? For example I use the latest version of DirectShow but the system has an older version installed? Thanks Jürgen