Hello,
I have a workflow where I take an MP3 voice recording and transcode it to
two files, one a 32 Kbps MP3 suitable for posting on a web site and the
other, an Ogg Vorbis file I use for broadcasting.
In the process of transcoding the original file, I want to 1) preserve ID3
tags, 2) Process for ReplayGain (by track) adding those tags.
Based on an example in the LS Cookbook, I wrote the following:
#!/usr/bin/liquidsoap
# Transcode an audio track into two other formats.
set("log.stdout", true)
set("log.file", false)
set("log.level", 3)
# input file
input = "test.mp3"
# output files
output_mp3 = "file.mp3"
output_ogg = "file-q1.ogg"
# A source that plays the the file once
source = once(single(input))
# Use a clock with disabled synchronization
clock.assign_new(sync=false, [source])
output.file(%mp3.cbr(samplerate=22050, mono=true, bitrate=32),
fallible=true, reopen_on_metadata=false, output_mp3,
source)
output.file(%vorbis(quality=1, samplerate=44100, channels=1),
fallible=true, reopen_on_metadata=false, output_ogg,
on_stop=shutdown, source)
It appears to copy the tags to the .ogg file successfully but not to the
.mp3 file. Is there anything I can do to get the metadata copied from the
original mp3 file to the transcoded one?
Also, is there a way to perform ReplayGain tagging on these files?
In addition, instead of hard coding the input file, I need to grab it from
the command line but so far, haven't been able to figure out how to use
system.argv.
Right now, I'm testing the script on Windows liquidsoap 1.1.1 but could
move it to Ubuntu 12.04.
Thanks for any assistance,
-Bill
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