9 Jan
2010
9 Jan
'10
8:41 a.m.
On Sat, 09 Jan 2010 13:14:28 +0100
Atte André Jensen <atte.jensen(a)gmail.com> wrote:
Renato wrote:
Exactly, add to that the no-mp3-support-problem, and you get
headaches pretty soon.
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
renato
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 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