I'm not really sure what type of audio you're using -- it says .mp4 and .mp4, and that's video. But the basic AE rule of thumb is don't use compressed audio. AE behaves oddly when compressed audio is involved. Got an mp3? Use a different application (like Audition) to turn it into uncompressed audio like wav or aiff.
I meant to say .mp3 and .mp4, Im going to see if i a wav or aiff works.
http://prntscr.com/9bsvkd Converted a song and even downloaded a aiff song and it still does cuts out at a certain point. (Even though the sound is on, on the video file there it is a silent clip) The only sound i want is the music.. without it cutting out!
Im using After Effects CS6 V220.127.116.11
Mac OSX Yosemite Version 10.10
2.7 GHz Intel Core i5
8 GB 1600 MHz DDR3
Intel iris pro 1536 MB Graphics.
I have quicktime v10.4
The file is a .mov no audio. (also tried converting to mp4 still no success)
Tried music files both aiff and mp3(mp4 w/ music video too)
This problem has never occurred before and has only now started to occur.
In your screen shot, both layers have audio: they have little speaker icons. Highlight both, then hit "ll" (lower case L) to reveal audio waveforms. Anything amiss with the waveforms? I assume you know the timeline is just 8 1/2 seconds long.
I also see the aiff's sample rate is 44.1 kHz. What's the audio sample rate for the AE project (in project settings)?
Finally: please identify the video codec of the unknown .mov file in the project.