Trouble converting MKV

[Gaskan]

I have 2 mkv files that I want to convert to DVD. I have extracted the avi, aac, chapters and subs from the mkv's. I have used aacdrop (name?) to convert audio to wav. Everytime I try to use any program to author dvd or to convert wav to mp2 or ac3 I get an error, because the audio is 6 channel 22000khz (?). Any suggestions what to do? Ive tried the following programs with the following errors

Besweet - (dvdlab wont recognize the wav or mp2 file)
ffmpegGui (error wont convert file)
Soundforge (wont open wav to convert and crashes)
Goldwave (doesnt recognize format)

Thanks for your help.

[celtic_druid]

Probably the aac was he aac, now without the header it is being decoded without the SBR part, so only half samplerate. I suspected this would happend, but when I tested it, the aac file still decoded ok, despite not showing up as he aac/sbr in coreaac, etc.

ffmpeg should accept aac input directly if it was compiled with --enable-faad. You could also use mplayer to directly decode from the mkv to wav.

[Gaskan]

I will give mplayer a shot. Any other help would be appreciated in case this doesnt work.

[celtic_druid]

Well here is an example of the kind of command line for extracting audio with mplayer:

mplayer.exe -ao pcm:file=output.wav -aid # input.mkv -vo null -vc dummy

-aid is used to specify the audio track you want if there is more than one. You may also use -alang eng, jap, etc. if the streams are tagged properly.

The above command I don't think will work with old mplayer builds as the syntax has changed it would be -ao pcm -aofile output.wav

[freebird73717]

Since you already have the wav file just load the wav into goldwave and resample upto 48k then save a new wav.

[Gaskan]

When I try to resample in Goldwave it comes out with tons of clicking. Perhaps I am doing something wrong?

[celtic_druid]

You can't expect good quality if it is 22Khz without the SBR part. Much better to decode it correctly.