[MPlayer-users] How to solve the different between AUDIO:44100 and 48000 in mplayer?

[Kermit Mei]

Dear all,
    I use mplayer to play some music an network stream to test the its
audio effect. Finally, I find that it's better to use '-ao oss' for the
music "AUDIO: 44100 Hz", and use '-ao alsa' for the music with "AUDIO:
48000 Hz".  Now, I use mplayer as a background program in my
application. I setup mplayer as the following arguments:

mplayer -ao oss -af volume=-5 -softvol -softvol-max 100 music.mp3

or

mplayer -ao asla -af volume=-5 -softvol -softvol-max 100 music.mp3


Before I play the music, I can't get (maybe just I don't know how to get
it) the media files "AUDIO" value. So I can't decide use "oss" or "asla"
before I play it. Is there better way to solve that? Or mplayer can
choose it automatically? Then how to solve it?

My music output just like the following:

music 1:
==========================================================================
Forced audio codec: mad
Opening audio decoder: [libmad] libmad mpeg audio decoder
AUDIO: 44100 Hz, 2 ch, s16le, 128.0 kbit/9.07% (ratio: 16000->176400)
Selected audio codec: [mad] afm: libmad (libMAD MPEG layer 1-2-3)
==========================================================================

music 2:
==========================================================================
Forced audio codec: mad
Opening audio decoder: [libmad] libmad mpeg audio decoder
AUDIO: 48000 Hz, 2 ch, s16le, 320.0 kbit/20.83% (ratio: 40000->192000)
Selected audio codec: [mad] afm: libmad (libMAD MPEG layer 1-2-3)
==========================================================================

network stream :
==========================================================================
Forced audio codec: mad
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 44100 Hz, 2 ch, s16le, 64.0 kbit/4.54% (ratio: 8003->176400)
Selected audio codec: [ffwmav2] afm: ffmpeg (DivX audio v2 (FFmpeg))
==========================================================================


Thanks
Kermit