You can set a poster that appears for SWF, FLV, and MP4 files while the video is not playing.
1)Select a SWF, FLV, and MP4 file.
2)Right-click the file and from the pop-up menu, select Set Poster.
3)For an FLV, SWF, or MP4 file, the Set Poster dialog appears.
a)Select From Media and click Play.
b)While the video is playing, at the appropriate moment click Capture Frame for Poster.
c)Click Save As and save the poster file (.dib) to disc.