If the caption file becomes separated from the media file, viewers will no longer have access to the captions. To address this problem, you can embed the caption data directly in the file using Microsoft Expression Encoder. Microsoft Expression Encoder accepts several file formats:
Intuitive, user-friendly GUI. Extremely easy use. Expecially the crop-and-resize interface. Job queue. Encodes to Windows Media Video. WMV file only What else one might expect from Microsoft, btw? Lake of one-pass constant quality encoding mode like Windows Media Encoder did.