VirtualDub MPEG-2 plugin 4.5

the browse audio feature seems bugged, it wont let me add a mp3 or an ac3 file into a video. yet the audio seems to work on other versions

I x264.exe and it has no this bug longer
"Result file" often "is fliped horizental " .
Recently ,"result file" play normally in a few second and play slowly in a few second .

it often have bug when convert .mpeg , .vob ,files which use mpeg-2 ,lpcm , .It say " ... can't accesss process ... "