Video2Flash Convertor is a directshow application, you'd better update your DirectX to DirectX 9.0 for better performence, for some video format , it need some codecs to decode movies, such as AVI(DivX, Xvid), WMV and RM. most of codecs are free to use. you can find the download address as below. more details infomation about codec, please visite our web site http://www.my-dvd-creator.com

Video & Audio Codec requirement

• Convert RM, RMVB to FLASH, you need install real alternative codec, you can download it from http://www.free-codecs.com/download/Real_Alternative.htm
• Convert QuickTime(MOV) to FLASH, you need install QuickTime Alternative codec, you can download it from http://www.free-codecs.com/download/QuickTime_Alternative.htm
• Convert AVI(Divx) to FLASH, you need install DivX codec, you can download it from http://www.free-codecs.com/download/DivX_Free.htm .
• Convert AVI(Xvid) to FLASH, you need install Xvid codec, you can download it from http://www.free-codecs.com/download/Koepi_XviD.htm
• Convert WMV,ASF to FLASH, you'd better update your windows media player to version 9 or above.

• We strongly recommand you to install the codec packet, It contains the best and newest codecs that are needed for playing most movies (Divx, VCD, SVCD etc.). you can download it from http://www.thecodecs.com/download.htm.

• ffdshow. some movies need it., you can download it from http://sourceforge.net/projects/ffdshow
• DirectX run time, You can download DirectX run time from microsoft http://www.microsoft.com/windows/directx/downloads/default.asp.
• Windows media player.
  You'd better update your media player to the latest version. converting some wmv to DVD will works better and faster.