WMV to FLV Converter will be your best assistant, which help you turn MP4 to SWF very quickly with the details. WMV to FLV Converter could convert WMV to FLV very flexibly. WMV to FLV Converter features: 1.Support all the Windows platforms: such as Windows 2000 and later systems, both 32bit and 64bit systems, XP, Window 7; 2.Support to convert videos to audioin batches. 3.Support to extract silent movie or audio from vide respectively. 4.Support the functions of setting the resolution, frame and quality for the newly produced videos in advance. 5.Support to set the resolution,frame,quality of video content. 6.Allow to customize the audio bit rate and sample rate freely to balance the size and audio quality. 7.Support to preview WMV file(s).