When you use realplay, sometimes you would like
to save the sound that you ear, to be able to listen to it later
in time. But realplay doesn't have a save
or export button, so how to do it ?
It seems hard, if not impossible.
So I decided to kick some code for a very tiny utility that would do this kind of things.
libreplay will save the output of realplay in
a raw format, so you can do what you want with this uncompressed data later
in time.
libreplay-0.1.tar.gz (very small file)
libreplay is in the public domain.
Just do a make in the directory, should be alright.
There will be the file libreplay.so which contains
everything usefull.
This works only on linux with oss. If you can't use it, try to contact me.
You must set the variable LIBC_PATH
to the place where your libc is (something like
/lib/libc.so.6). If you are under bash,
just do export LIBC_PATH=/lib/libc.so.6 (replace
/lib/libc.so.6 by your libc of course).
Do LD_PRELOAD=./libreplay.so realplay in the
directory where libreplay is and then
it will create a file /tmp/sed.pipo where the output
of realplay will go instead of /dev/dsp. It will
create /tmp/sed.pipo.mixer too, because realplay
opens /dev/mixer and outputs zeros if it can't
find it. It will overwrite /tmp/sed.pipo each
time you play a new stream.
The output is a raw file, use sox or you favorite
conversion program to transform it into a format you like more.
libreplay will tell you the format (8 or 16 bits),
the sample rate and the number of channels of the stream.
It has been tested against realplayer 8.
Contact me so I can help you.
It should be very easy to read the code and know what's going on.
To be quick, we use the preload facility to catch open,
close and ioctl to let realplay think it
is talking to /dev/dsp where in fact it outputs sound
into a regular file.
Could it be easy for realplay to know it is not
talking to /dev/dsp ? Well, I don't know... and
I don't care. I want to control what happens inside my computer.
Creation time: Fri, 29 Nov 2002 22:08:22 +0100
Last update: Fri, 29 Nov 2002 22:08:22 +0100