MP3 recoding problems

[Lousy Bassist <lousy_bassist@yahoo.com>]

I have a problem with my method of recoding MP3's.

What I'm doing is using mplayer to stream a random selection of MP3's, 
with altered speed to a named pipe.

Then I am cat'ing that pipe into lame and recoding a single cohesive MP3.

# mplayer -loop 0 -shuffle -speed .2 random_stuff/*mp3

# cat audiodump.wav | lame -q7 - out.mp3

(in two separate terminals)

My problems are:

1. I have to keep the quality setting of lame raised, otherwise when 
mplayer reaches the end of one sample, lame finishes before the next 
sample starts and the whole process stops.

2. I have to manually stop the process by using ls and checking the output 
file size.

What I want to be able to do is lower the quality and bitrate of the 
encoding, so it runs a lot faster, and takes up less space, yet continues 
to run between mplayer swapping samples.

Also be able to stop the encoding and move on when either the file size 
reaches a specified point, say 50MB. Or go by play length and have the 
encoding stop when the output MP3 reaches a specified length, say an 
hour. Whichever is easiest to code.

h.

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