Every time I try to convert my video to mp3 audio I get an error. What am I doing wrong? It says ‘inadequacy’.

Yestoday I find a MP3 converter, it can convert all video formats to .mp3 and all audio formats to mp3. The high speed and easy operation impress me a lot.

Compared with free one , I can convert any video arbitrarily witout worry about the quality. It takes me $3.95. You can buy it at $3.95 price before sept.15th .