#1 Media Fixer can help you to check and repair the partly damaged media files that can not be played or dragged.
#1 Media Fixer Main Features:
Fix the media file can not be played or dragged.
Fix the media file which are not completely downloaded downloaded.
Fix the partly damaged media file.
Sent out a sound when complete the task.
Support: WMA,
wmv,
asf, WM,
asx, AVI ,
vob, RM, MP3, MP2,
mp1,
mpa, MPGA, MPG, MPEG,
mpa, DAT, WAVE, Jpeg and BMP.
The rate of success in the fix has reached 82.8% to 97.6%
Very User-friendly interface.
MP4 Converter
1.35 MB 
$ 28.95