For some reason, jwplayer won't play sound with the mp4 video. Video works fine if viewed directly in chrome for example, but won't play sound in any browsers.
I used Miro Video Converter to convert to MP4.
This is their conversion matrix so you can see how they get MP4 file.
Is it encoding issue of the audio?
Checked FLV files, they work fine with sound.
Any reason for audio not playing?