Erik de Castro Lopo wrote: > Ken Restivo wrote: > >> I'm looking for a way to play a wav file from STDIN that'll work with JACK. > > In general, WAV files are not designed for reading from things like pipes. > The problem is that they can contain metadata *after* the audio data. > > There are however file formats that are specifically design to be allowed > to be read from pipes, like AU and CAF. Both of these formats have all > metadata before the audio data and do not allow trailing metadata. > > Both AU and CAF formats support a wide range of audio data formats > including 16, 24 and 32 bit integer PCM, 32 bit floats, 64 bit floats, > Alaw, ulaw etc. > >> mplayer -ao jack (or just mplayer without JACK) won't handle WAV files on stdin, for some reason. >> >> Cannot seek backward in linear streams! >> Seek failed > > Mplayer is probably being a little conservative. > > libsndfile does allow reading from pipes as long as the file is > not too broken. > >> I need to do this because I'm playing wavpack'ed files: I need to do >> "wvunpack -o - filename.wv | SOMETHING - ". I do *not* want to have to >> unpack them to disk just to play them. > > Does wvunpack support output as AU of CAF? > > If wvunpack only does WAV output, you have two solutions: > > - Write SOMETHING to use libsndfile which does read from a pipe. > > - Hack wavpack support into libsndfile :-). How about basically wvunpack | lame | mplayer out to JACK? You could use your choice of intermediate encoder. -- David gnome@xxxxxxxxxxxxx authenticity, honesty, community _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
