Easy way to concatenate a bunch of audio files?

[DinkyDogg]

I believe amarok looks at the header of the file to get the song length, so just concatenating mp3s like that would confuse it. I'll look into converting to a raw file and concatenating that.

[jan.kolar]

There is a way how to save disk IO and disk space:

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 flac -d -c --force-raw-format  --endian=big --sign=signed   someprefix*.flac |tee tmpx  | flac --force-raw-format --endian=big --sign=signed --channels 2 --bps 16 --sample-rate 44100  -   >  outputfile.flac

(I hope everything is 16bit 44100Hz. Check with metaflac.)

Can make to be an alias command (in unix/cygwin...)
or batch file (DOS/MSwindows), probably even with some drag-and-drop capability.
(BUG: commandline has severe size limit in DOS/mswin)

[DinkyDogg]

Wow, that looks like exactly what I needed.

I'll try it for the next audiobook I rip. Thanks for the help.

[DinkyDogg]

I tried it, and it has the same problem I had with shntool. It doesn't write the tag for the song length.

There ought to be some way to fix the length tag. Any ideas?

[jan.kolar]

Aha, try to replace "> outputfile.flac" with "-o outputfile.flac".
Should be much better.

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flac -d -c --force-raw-format  --endian=big --sign=signed   someprefix*.flac |tee tmpx  | flac --force-raw-format --endian=big --sign=signed --channels 2 --bps 16 --sample-rate 44100  -   -o  outputfile.flac

And maybe you want to put there some sorta ID tags. That could be done by metaflac afterwards.
Im lasy to try or test. So some hints how to do or how to find out.

perhaps this should work

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metaflac --list   thefirstfile.flac
metaflac --export-tags-to=FILE thefirstfile.flac

edit FILE
or, to just prepend ALL to the tags:         sed 's/=/=ALL /' FILE >FILE2
or to TITLE only:     sed 's/TITLE=/TITLE=ALL /' FILE >FILE2
or to the end of the tags:        sed 's/$/ ALL/' FILE >FILE2

metaflac --import-tags-from=FILE    theHUGEfile.flac
or
metaflac --import-tags-from=FILE2  theHUGEfile.flac

--

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For more info:
man metaflac

--set-tag=FIELD       Add a tag.  The FIELD must comply with the Vorbis comment
                      spec, of the form "NAME=VALUE".  If there is currently
                      no tag block, one will be created.
--import-tags-from=FILE Import tags from a file.  Use '-' for stdin.  Each line
                      should be of the form NAME=VALUE.  Multi-line comments
                      are currently not supported.  Specify --remove-all-tags
                      and/or --no-utf8-convert before --import-tags-from if
                      necessary.
--export-tags-to=FILE Export tags to a file.  Use '-' for stdin.  Each line
                      will be of the form NAME=VALUE.  Specify
                      --no-utf8-convert if necessary.
--show-tag=NAME       Show all tags where the the field name matches 'NAME'.

I dont know what is cuesheet but you might want to manipulate this, too. By metaflac.
Likewise with seekpoints. The second one is technical but you might enjoy it, to.
--add-seekpoint=600s should speed up the search if you command to play starting from 10minutes from begining.
More in man metaflac.

[/size]