As the converting process is almost the same, so here I only take how to convert FLV to MP3 For example:
Step 1: FLV to AVI MPEG WMV 3GP MP4 Ipod converter
Step 2: Launch FLV to AVI MPEG WMV 3GP MP4 Ipod converter:

Step 3: Click
to input FLV video file to be convertered(batch convertsion supported, you can feel free to add as many as you wish).
Step 4:In the file list, left click the FLV video file to be converted, the preview video screen may auto play the selected FLV file, just click pause button, then click the down arrow , Choose: "MP3 ."
Then click the folder button, select the destination folder you want the converted MP3 to store.

Step 5: Click
button.
the process shall be looked like this:

After successful converting FLV to MP3 , the converted MP3 Audio shall be stored in the folder you have previously selected.
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