[Jack Gladney]

I’ve been struggling with exactly this same issue — encoding f4v from AME cs5 (and 5.5) and getting a subtle echo or vibrato on the audio track. My source video is ProRes, and I’ve tried multiple audio codecs as source audio from mp3 to wav, 44.1 kHz and 48, with no audible difference in the final result. I’ve also found that when encoding AAC in AME using the h264 or flv presets, the sound comes out fine. Only when encoding f4v do I get this echo.

Has anybody figured out a way to correct this? Is this just the audio quality one should expect when encoding f4v in AME? Greatly appreciate any help, here — MANY thanks.

Working on a 2011 Macbook Pro, Lion 10.7.3 (but have encountered this issue on multiple mac systems and operating systems, including Snow Leopard).

Best,
Jack