We are sorry there were errors occurred when you converting your files.  The following are methods that may help you troubleshoot and solve many of your problems.
You meet the following problems:
1. Error occurred when converting files to Mp4(iPod, PSP), 3GP format.
2. There was an error message or converting success, but there was no output file.
3. Other converting problem.
4. Error Still Occurred? Report to our support team.
  1, Error occurred when converting files to Mp4(iPod, PSP), 3GP format.

QuickTime codec may missing in your computer. We recommend you to download and install Apple QuickTime.

Steps:
1. Download and install QuickTime. (Click here to go to the official website of QuickTime to download.)
2. Add your files and convert it to the format you want.
   
 

2, There was an error message or converting success, but there was no output file.

You can open directshow setting and convert the files using you own codec.

Steps:
1. Help->Settings->DirectShow-> Check Use DirectShow.
2. Add your files and convert it to the format you want.
   
  3, Other converting problem.

There maybe some audio or video codec missing in your computer. We recommend you to download and install K-Lite Codec Pack and use directshow to decode.

Steps:
1. Download and install K-Lite Codec Pack. (Click here to go to the official website of K-Lite Codec Pack to download.)
2. Help->Settings->DirectShow-> Check Use DirectShow.
3. Add your files and convert it to the format you want.