ExSport wrote:Why to transcode original audio
Because it offers superior A/V sync.
As for previous versions of mencoder you are wrong. I had several test files that play out of sync with ac3 remux regardless of mencoder version (both win and linux). It is even worse with avi files, thank God it usually not necessary to transcode them.
To solve these problems once and for all I think we should consider switching from mencoder to ffmpeg for audio tracks extraction. It is way more reliable.