Adjust your transcode settings to custom or change to a different preset. For 1 hr. 40 min. with no ROM Content here are the settings to maximize quality:
100 min. PCM audio with 5% headroom = 4.4 Mbps
100 min. AC-3 audio with 5% headroom = 5.7 Mbps
100 min. PCM audio with 10% headroom = 4.1 Mbps
100 min. AC-3 audio with 10% headroom = 5.4 Mbps
Hope this helps – on PC, right click file to “Transcode Settings” and if you want to customize, go to “Edit Quality Presets”
Ricky