I have a FLV that I want to save as a wave file to extract the audio. I opened the .flv in Quicktime Pro and did Export>Sound as Wave. It renders a wave file, about 58MB in size, but there's no sound. Looking at the waveform in Audacity confirms that the file is blank and contains a flat waveform. I tried converting the FLV to quicktime and then converting to wave (and even AIFF), but the problem persists. Any ideas?