By AVI to FLV Converter you can set the audio bit rate and sample rate freely. Users could set the properties of FLV file(s) flexibly. AVI 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 extract video/audio from AVI file(s) humanly. 6.Support to preview source file. 5.Allow to customize the audio bit rate and sample rate freely to balance the size and audio quality.