Hello,
The are many reasons why the conversion failed:
1) The source codec is not 100% supported. You will need to install another suitable codec.
2) The source has some broken frames or errors.
3) Quicktime player was not installed.
We would advice to send us the sample file. Please send to
softdiv@gmail.com . We will test and advice. Thanks
Best Regards;
Rick
Softdiv Software