Good evening, I'm currently working on a BASH script to convert audio between file formats and I've come across a snag. At the beginning of the script, I'm having the system check to see if any files with the .m4a extension exist in the directory, and if so, it runs the script. If there are no .m4a extensions, it produces an error. Here is the script:
Code:
if [ -f *.m4a ]; then
read -p "Enter bitrate value. [128/256/320] > " bitrate
for f in *.m4a; do
avconv -i "$f" -b "$bitrate"k "${f%.m4a}.mp3"
done
read -p "Would you like do remove the original .m4a files? [Y/N] > " remove
if [[ $remove == [Yy] ]]; then
rm *.m4a
else
exit 0
fi
else
echo "There are no .m4a files in the current directory."
fi
The directory I'm trying to test the script with has the following files:
01 The Veldt (Radio Edit).m4a 02 The Veldt (8 Minute Edit).m4a
When I run the script on this directory I get this error:
/home/kburkholder/bin/m4a2mp3: line 6: [: 01 The Veldt (Radio Edit).m4a: binary operator expected
Is there something I'm doing wrong with the file check part at the beginning of the script? I've tried using both double quotes, single quotes and no quotes at all and none are giving me the results I'm looking for. Any insight would be greatly appreciated! Thanks!
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Discussion started by: cumulus_255
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LEARN ABOUT DEBIAN
dir2ogg
DIR2OGG(1) General Commands Manual DIR2OGG(1)NAME
dir2ogg - Convert MP3, WAV, and M4A files to OGG format
SYNOPSIS
dir2ogg [ options ] ( filename [filename2] ... || directory [directory2] ... || [cdrom-device] ... )
DESCRIPTION
dir2ogg converts MP3, M4A, WMA and WAV files to the open-source OGG format. dir2ogg is a python script that simply binds together mpg123,
faad, and oggenc making it easier for the user to convert his/her music files. OGGs are about 15 to 20 percent smaller than MP3 files, with
the same relative audio quality. dir2ogg can be called with the -d flag at the command line to convert any number of directories at once,
or given MP3, M4A, WMA, and/or WAV filenames as arguments, dir2ogg will convert only those files. If converting WAV, M4A or WMA files with
-d you must add the -w, -m or -W command line flags respectively. These flags are not neccesary unless using -d. Note that converting M4A
files requires you to have faad installed, and converting WMA files requires mplayer.
Keep in mind that converting from MP3 or M4A to OGG is a conversion between two lossy formats. This is fine if you just want to free up
some disk space, but if you're a hard-core audiophile you may be disappointed. I really can't notice a difference in quality with 'naked'
ears myself.
General Options
-h or --help
print quick usage details to the screen.
-d or --directory
convert all MP3 files in directory. WAV and M4A files will be converted if used with the -w and -m command line flags. This option
is for compatibility purposes only and does not need to be specified anymore.
-r or --recursive
like -d but descends recursively into directories.
-c or --cdda
Convert an audio CD into ogg. You may pass the device as an argument to the script (default: /dev/cdrom). Requires cdparanoia orq
icedax or mplayer
-p or --preserve-wav
preserve all WAV files. By default they are deleted.
-P or --no-pipe
Do not use pipes to send data from the decoder to the encoder, use temporary wav files instead.
--delete-input
Delete the input file after conversion
-v or --verbose
increase dir2ogg's verbosity.
-Q or --quiet
Do not display progress messages, except the name of the file which is currently converted. Some decoders provide no way to disable
messages and thus may still display some.
Conversion options
--convert-all
Convert all supported audio files found in the directories given on the command-line to Ogg Vorbis.
-f or --convert-ape
Convert all APE (Monkey's Audio) files found in the directories given on the command-line to Ogg Vorbis, using either ogg123 or flac
or mplayer.
-f or --convert-flac
Convert all FLAC (Free Lossless Audio Codec) files found in the directories given on the command-line to Ogg Vorbis, using ogg123 or
flac or mplayer.
-m or --convert-m4a
convert all M4A (MPEG-4 Audio) files found in the directories given on the command-line to Ogg Vorbis, using faad or mplayer. For
decoding ALAC (Apple Lossless) files, 'alac-decoder' may be used.
-m or --convert-mpc
convert all MPC (MusePack) files found in the directories given on the command-line to Ogg Vorbis, using mpcdec or mplayer.
-W or --convert-wma
Convert all WMA (Windows Media Audio) files found in the directories given on the command-line to Ogg Vorbis, using mplayer.
-w or --convert-wav
Convert all WAV files found in the directories given on the command-line to Ogg Vorbis.
-V or --convert-wv
Convert all WV (WavPack) files found in the directories given on the command-line to Ogg Vorbis.
-n or --no-mp3
ingore all MP3 files found in directories given on the command-line.
--(ape|cd|flac|m4a|mp3|mpc|wma|wv)-decoder=COMMAND
Set the decoder you want to use for one filetype, e.g.: --mp3-decoder=lame. Run dir2ogg --help to see the available decoders.
-qN or --quality=N
OGG quality. N is a number between -1 and 10. Default is 3. Decimals are OK (ie: 3.7)
-t or --smart-mp3
Try to use the same quality as the input file. MP3 input only!
SEE ALSO mpg123(1), mplayer(1), oggenc(1)BUGS
Enter you bug reports in Launchpad at https://bugs.launchpad.net/dir2ogg
AUTHORS
0.10 and newer: Julian Andres Klode <jak@jak-linux.org>
0.9.3 and older: Darren Kirby <d@badcomputer.org>
CONTRIBUTORS
original wma support: Cameron Stone <camerons@cse.unsw.edu.au>
smart-mp3: Marek Palatinus <marek@palatinus.cz>
dir2ogg 0.11.8 2009-08-04 DIR2OGG(1)
09-16-2012
Thanks!