a codec is a separate file that handles audio visual data and is separate from this and other programming languages
windows media player can play default wmv/wma and mpg/mp3's but without a codec it cannot do divx movies or 'custom' wmv (sound will play on most)
so if your movie has been saved with a custom codec that blitz doesnt understand or have access to then just audio is probably all it can access
try re-saving the movie under default conditions
windows media player can play default wmv/wma and mpg/mp3's but without a codec it cannot do divx movies or 'custom' wmv (sound will play on most)
so if your movie has been saved with a custom codec that blitz doesnt understand or have access to then just audio is probably all it can access
try re-saving the movie under default conditions