-of rawaudio works wrong under certain circumstances

[gggg08@…]

Sometimes (with some files), command line "mencoder "temp.avi" -ovc frameno -oac copy -o "temp.aac" -mc 0 -noskip -of rawaudio" will result in audio being 510-512ms instead of full duration. This happens, if "temp.avi" is generated with command line "mencoder -demuxer mkv "input_file_path" -o temp.avi -vf ass,scale=480:272,harddup -af channels=2 -srate 44100 -oac faac -faacopts br=128:mpeg=4:object=2 -ovc x264 -ffourcc avc1 -x264encopts me=umh:level_idc=13:keyint=250:frameref=2:bframes=0:threads=auto:profile=main:rc_lookahead=60:crf=20 -aspect 16:9 -mc 0 -ass". However, this will not happen, if you add -noskip to the above command line so that it becomes "mencoder -demuxer mkv "input_file_path" -o temp.avi -vf ass,scale=480:272,harddup -af channels=2 -srate 44100 -oac faac -faacopts br=128:mpeg=4:object=2 -ovc x264 -ffourcc avc1 -x264encopts me=umh:level_idc=13:keyint=250:frameref=2:bframes=0:threads=auto:profile=main:rc_lookahead=60:crf=20 -aspect 16:9 -mc 0 -ass -noskip".
Problem with this approach, is that if I use -noskip, on some files ​http://bugzilla.mplayerhq.hu/show_bug.cgi?id=2147 will occur. And yeah, I use same command line on lots of files and it works relatively well with exceptions like this and bug 2147
File to test this one:
Seeded torrent ​http://www.nyaa.se/?page=view&tid=490983

[gggg08@…]

Double post by mistake