Need a Video/Audio convertor with below features.. Here is an example that you can see what we need
[login to view URL]
Platforms are: XP, WINDOWS 7 AND WINDOWS 8
[login to view URL] between multiple video formats: AVI, MPEG, WMV, MP4, FLV, MKV, H.264/MPEG-4, DivX, XviD, MOV, RM, RMVB, M4V, VOB, ASF, 3GP, 3G2, SWF, H.261, H.264, DV, DIF, MJPG, MJPEG, DVR-MS, NUT, QT, YUV, DAT, MPV, NSV
[login to view URL] between various audio formats, MP3, WMA, AAC, WAV, CDA, OGG, CUE, M4A, RA, RAM, AC3, MP2, AIFF, AU, MPA, SUN AU
Language file is need too. That client can use the program with their language.
Also you can use open source code but with new unique GUI.