compressing AC3 5.1 do wich codec?

[Kumo]

i need to compress an AC3 5.1ch 448kbps 48khz track to a smaller file.actual size is 305mb,target size is 230mb, so i suppose the bitrate should be around 344kbps for the target track.wich codec and wich settings to have best result keeping the six original channels?

[shon3i]

Aften AC3 encoder

[Kumo]

is a 6channels 340kbps AC3 track as good as a 6channels 340kbps AAC track is?

[shon3i]

Well the aac should keep more quality on that bitrate, because AC3 6ch @ 384kbs is minimum for most footage

[Kumo]

i'm trying to convert it using megui.i can't obtain the filesize i need.with neroaacenc i get a 290mb file using vbr q=1,if i use q=0.8 filesize is 680mb(???).using faac at 340kbps vbr, i get a 440mb file(???).what's worng?how can i get the filesize i need(230mb).

[tebasuna51]

i'm trying to convert it using megui.i can't obtain the filesize i need.with neroaacenc i get a 290mb file using vbr q=1,if i use q=0.8 filesize is 680mb(???).using faac at 340kbps vbr, i get a 440mb file(???).what's worng?how can i get the filesize i need(230mb).

Use BeLight or BeHappy to do audio conversion.

If you want use megui put your problems in megui thread.