lördag 09 januari 2010 13:45:14 skrev Renato: > On Sat, 09 Jan 2010 13:14:28 +0100 > > Atte André Jensen <atte.jensen@xxxxxxxxx> wrote: > > Renato wrote: > > > ha, I guess the sox you have doesn't handle mp3. does 'play > > > file.mp3' work? It was the first time I ever used sox so I'm no > > > expert... probably compile time options? > > > > No: > > > > atte@vestbjerg:~/tmp/collage/licks$ play do_you_like_it.mp3 > > play FAIL formats: no handler for file extension `mp3' > > > > Indeed a compile time option. Another reason to be extra careful with > > sox. > > > > >> 3) Although I did this myself, sox is not really nice to wrap in > > >> the first place, since it sometimes changes the names of the > > >> arguments and stuff like that. So your script might not work after > > >> the next upgrade of sox :-( > > > > > > uh, this is bad news indeed > > > > Exactly, add to that the no-mp3-support-problem, and you get > > headaches pretty soon. > > > > >> 4) I'm not sure mp3 files are the most obvious file format to work > > >> with, any specific reason you're not working with simple .wav's? > > > > > > well, most of my music collection is in mp3... I guess I could > > > prompt the user for which filetype to look for > > > > Or how about this: define using mplayer to convert all found > > audiofiles (at least m4a, wma, ogg, wav, aif, flv, au, aiff, mp3 and > > mov should work) into wav, for instance by wrapping the following > > oneliner in os.system(): > > > > mplayer -vo null -vc dummy -ao pcm:waveheader FILE_TO_CONVERT > > > > Note that that'll give you the result in audiodump.wav, so remember > > to rename that after each pass. Then to make it easier on the user, > > check if mplayer is installed at the top of the script, if not, > > abort, else proceed. Deliver the result in wav, and let the user > > decide of he wants to degrade the quality and encode to mp3. > > > > All this means that sox should only worry about the splicing, no en- > > or decoding, which should make things a little simpler and more > > robust. > > yeah, but all files would be converted entirely to wav, taking up > potentially much hard disk space... I was concerned about this. Instead > with > sox in.mp3 out.wav trim 1:35 5 > you'll end up with a wav of 5 seconds... Since anyway for the purpose > of the script I'd have to trim them, I prefer it. > Does mplayer have a way to trim? i.e. outputting only a portion of the > file, not the whole from beggining to end You could use: mplayer -ss 10 -endpos 2 -ao pcm:waveheader ~/sound/mp3/01.mp3 which means start at 10 sec and play for 2 sec and dump to audiodump.wav But you could also go for a more generic python way and use pymedia. Here's an example. http://pymedia.org/tut/src/dump_wav.py.html But you also used sox to mix and do other stuff which I don't know if pymedia will do. regards, /bengan _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
