bitzify 0.2 alpha

GETTING STARTED:
================

You need "taglib" for the audiotags utility:
http://developer.kde.org/~wheeler/taglib.html

pkg-config is used to determine the compiler and linker flags for taglib.

Run "make" to compile the following helper utilities written in C:

audiotags	# extracts metatags from Ogg/MP3/FLAC.
first20		# encodes the first 20 bytes of a file as a hexadecimal string.
urlencode	# encodes unsafe characters as % HEX HEX.
htmlencode	# encodes non-ASCII characters as numeric character references.

Run "make install" the executables into "$PREFIX/bin/".

You'll need the following additional tools:

sh		# A functional bourne shell. mksh, ksh, bash are fine, too.
mplayer		# identify media files
file		# determine mime type
curl		# submit metadata to bitzi.com
bitter		# file hashing of bitprints (unless it's all cached)
bc		# mathematical calculations
ogginfo		# extract average bitrate from Ogg/Vorbis files

bitter is available from the SVN repository of gtk-gnutella.


USAGE:
======

In order to extract metadata from FILE run

	bitzify --meta FILE

Note that bitzify accepts only a single FILE argument. This is
meant to avoid problems with pathnames containing whitespaces
which may accidently be unquoted and result in multiple arguments.

By default the metadata is just printed to standard output. Use

	bitzify --meta --output=OUTPUT FILE

to print it to file OUTPUT instead. You can use the generated
file OUTPUT later with the --import option, in order to send it
to bitzi.com.

In order to submit metadata to bitzi.com log into your bitzi
account with your web browser, extract the the ad_user_login
cookie and store it in ~/.bitzify/cookie like this:

Set-Cookie: ad_user_login=SECRET

Then run

	bitzify --submit --meta FILE

for extracting metadata from FILE and submitting it to bitzi.com.
If you store the cookie elsewhere use

	bitzify --submit --cookie=COOKIE --meta FILE

whereas COOKIE is the path of the file which holds the cookie.

When you submit metadata, you will will be asked whether you want
to edit the metadata before it is actually submitted. This can be
disabled with --batch.

It is recommendable to log all submissions to bitzi, so that
you know which files have been processed and double-check if
the metadata was submitted as desired. Thus use

	bitzify --submit --meta --log-file=LOG [...]

to append the metadata to LOG.

If you want to submit preprocessed metadata files instead use
the --import option:

	bitzify --import --submit --cookie COOKIE FILE

Now FILE refers to the file holding the metadata. This is useful
if you want to add/modify/correct metadata for many files and
then submit them later to bitzi.

If your files are already hashed by gtk-gnutella, use the
option --sha1-cache option to avoid rehashing them:

	bitzify --sha1-cache=~/.gtk-gnutella/sha1_cache [...]

If the file is not found in CACHE, the bitprint will be calculated
with bitter. To avoid specifying this argument each time, you
can also copy the cache file to ~/.bitzify/sha1_cache or create
such a symlink.

If something goes wrong you might find file names "bitzify-tmp.*"
in your temporary directory ($TMPDIR or /tmp). Just delete them
when you are sure you are not using bitzify currently.


ENVIRONMENT VARIABLES:
======================

bitzify uses the following environment variables:

TMPDIR	Directory used for temporary files. Defaults to "/tmp".
VISUAL	Editor to use for editing metadata. Defaults to "$EDITOR"
        and if $EDITOR is also unset or empty, "vi" is used.
EDITOR  See VISUAL.


EXAMPLES:
=========

# Print metadata for each FLAC file in "/audio/" for testing.
for f in /audio/*.flac; do bitzify --meta "$f"; done

# Submit metadata of all Ogg files in the current directory
for f in ./*.ogg
do
    bitzify --submit --meta --cookie=~/.cookie "$f"
done

# Submit a "Best version" judgement of all MP3 files in the
# current directory for which Bitzi already provides tickets.
for f in ./*.mp3
do
    bitzify --submit --judgement=best "$f"
done

# Same as above but submit the metadata too. Files that have no
# Bitzi tickets yet cannot be judged.
for f in ./*.mp3
do
    bitzify --submit --meta --judgement=best "$f"
done


ADVANCED EXAMPLES:
==================

# For each file in the current directory, create a file containing the
# bitzi metadata and use the sha1 cache.
for f in ./*
do
    meta=~/tmp/"${f##*/}.bitzi"
    bitzify --meta --sha1-cache=~/.gtk-gnutella/sha1_cache \
        --output="$meta" "$f"
done

# If you modified the metadata files you might want to check the
# metadata files. The check is only rudimentary though:
for meta in ~/tmp/*.bitzi
do
    bitzify --import "$meta" >/dev/null && continue
    echo "ERROR: Damaged meta data: \"$meta\""
done

# Submit all generated metadata files to bitzi and don't ask for
# confirmation.
for meta in ~/tmp/*.bitzi
do
    bitzify --submit --cookie=~/.cookie --batch --import -- "$meta"
done


CAVEATS:
========

For your own and your files' safety, use an account that has only read
access to the files and directories.

Do not judge mislabeled files negatively! Instead submit metadata
with an appropriate filename.

Sometimes metatags are not correctly encoded and must be corrected
manually. Make sure you don't submit garbage.

Bitzi doesn't really have Unicode handling either. All Non-ASCII tags
are problematic. However, all submitted data should use Unicode.

Since mplayer does not provide an accurate duration for audio files
in many cases, audiofiles are decoded to PCM using a fixed sample rate,
8-bit mono samples, so that the duration can be calculated precisely.
Obviously this is rather slow.

Whether an MP3 uses VBR is not detected currently.

bitzify is mostly useful for audio and video files.

The following non-exhaustive list show which files and codecs are
typically recognized.

Audio files:
MP3 (mpg/mp3)
Ogg/Vorbis (ogg/oga)
FLAC (flac)

Video files:
Xvid (avi/mkv)
DivX (avi/mkv)
Matroska (mkv)
MPEG-1 (mpg/mpeg)
MPEG-2 (mpg/mpeg2)
MPEG-4 ASP [Xvid/DivX/WMV3] (avi/mp4/mkv)
MPEG-4 AVC [H.264/AVC] (avi/mp4/mkv)
OGM (Xvid/DivX) (ogm)

Archives:
ZIP (application/x-zip)
RAR (application/x-rar)

Text:
TXT (text/plain)


TODO:
=====

 - Add support MPEG-4 audio (AAC), WAV (PCM), MPEG-2 audio.
 - Login so that user doesn't have pass the cookie manually.
 - Double-check "confirmed" tags, ask user.