Frage von Citylife:
I am looking for an opportunity to use the alpha channel of a video project from Sony Vegas 7.0 to export a flash-animated background. 
 The only way that I've found so far, is an export to a Quicktime format in the animation codec, but then I have the problem that the file huge wid. 
 Has one perhaps an idea what codec else I might need, or how I handle the problem differently might have? 
 Thanks in advance
 Antwort von  globalvj:

since you probably are not the alpha channel as grayscale film 
 rausrendern, there is only my knowledge qt-animation or 
 image sequences as psd / tiff / targa / pict png or an alpha channel 
 may contain. 
 gruß cj