用mplayer製作的wav file問題

[pooh9038]

使用mplayer -ao pcm -vo null xx.asf 製作的wav file,它的格式是不是不能製成可供
普通CD機(沒有電腦)使用的CD?

按照Xcdroast的FAQ,寫著

X-CD-Roast can only write CD-quality wav-files (44.1khz, 16 bit, stereo) - If your files do not meet this requirements they will be displayed with an audio-icon with a red slash through it. This files can't be written and will be ignored until you convert them into a proper format.

正如所料,我用 mplayer製作的wav在X-CD-Roast顯示不能制作,而顯示的播放時間只有原來的一半.

用mplayer製作的wav信息如下:

Playing 2002090114.asf
Cache fill: 0.00% (0 bytes) ASF file format detected.
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 22050 Hz, 2 ch, 16 bit (0x10), ratio: 2503->88200 (20.0 kbit)
Selected audio codec: [ffwmav2] afm:ffmpeg (DivX audio v2 (ffmpeg))
==========================================================================
Checking audio filter chain for 22050Hz/2ch/16bit -> 22050Hz/2ch/16bit...
AF_pre: af format: 2 bps, 2 ch, 22050 hz, little endian signed int
AF_pre: 22050Hz 2ch Signed 16-bit (Little-Endian)
PCM: File: audiodump.wav (WAVE)
PCM: Samplerate: 22050Hz Channels: Stereo Format Signed 16-bit (Little-Endian)
PCM: Info: fastest dumping is achieved with -vc null -vo null
PCM: Info: to write WAVE files use -waveheader (default); for RAW PCM -nowaveheader.
AO: [pcm] 22050Hz 2ch Signed 16-bit (Little-Endian) (2 bps)
Building audio filter chain for 22050Hz/2ch/16bit -> 22050Hz/2ch/16bit...
Video: no video
Starting playback...

而用xmms開啟所制成的wav,顯示的格式為 705Kbps,22kHz.

不知在mplayer中有無可供調節制造wav質量的用法?還是受了聲卡或電台播放的質量所限制而不能制成高質量的wav file?

[阿信]

可以用sox來resample成標準cd的wav檔案，然後在燒成audio cd

[訪客]

原來用sox old.wav -r 44100 new.wav 便可.

可惜家中的CD損坏,未能測試,但電腦上已可按普通audio cd
播放(不用mount)