convert: Don't stop when files can't be copied

[tmplt]

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Problem

In the process of exporting my whole music library in a lossy format (beet convert --dest /path/to/dest/) I stumbled upon a few invalid database entries that stopped the conversion.

$ beet -vv convert --dest .
user configuration: /home/tmplt/.config/beets/config.yaml
data directory: /home/tmplt/.config/beets
plugin paths:
Sending event: pluginload
library database: /home/tmplt/media/music/.lib/musiclibrary.blb
library directory: /home/tmplt/media/music
Sending event: library_opened

[All tracks in the library]

Convert? (Y/n)
convert: Copying /home/tmplt/media/music/__/00.mp3
convert: Copying /home/tmplt/media/music/__/00.1.mp3
convert: Copying /home/tmplt/media/music/__/00.3.mp3
convert: Copying /home/tmplt/media/music/__/00.2.mp3
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/beets/util/__init__.py", line 442, in copy
    shutil.copyfile(path, dest)
  File "/usr/lib/python2.7/shutil.py", line 82, in copyfile
    with open(src, 'rb') as fsrc:
IOError: [Errno 2] No such file or directory: '/home/tmplt/media/music/__/00.mp3'

Error: No such file or directory while copying /home/tmplt/media/music/__/00.mp3 to /home/tmplt/.mnt/Palaven/music_export/_/[0000]/00.mp3

I've had the library for a while; unfortunately I don't remember what created those entries.

Is there a way to remove these entries, alternatively force the conversion, ignoring possible errors?

Setup

• OS: Arch Linux
• Python version: 2.7.12
• beets version: 1.4.2
• Turning off plugins made problem go away (yes/no):

My configuration (output of beet config) is:

convert:
    embed: yes
    quiet: yes
    never_convert_lossy_files: yes
    format: ogg
    formats:
        mp3:
            command: ffmpeg -i $source -qscale:a 0 $dest
            extension: mp3
        ogg:
            command: oggenc -q6 -o $dest $source
            extension: ogg
        alac:
            command: ffmpeg -i $source -y -vn -acodec alac $dest
            extension: m4a
        aac:
            command: ffmpeg -i $source -y -vn -acodec libfaac -aq 100 $dest
            extension: m4a
        opus: ffmpeg -i $source -y -vn -acodec libopus -ab 96k $dest
        flac: ffmpeg -i $source -y -vn -acodec flac $dest
        wma: ffmpeg -i $source -y -vn -acodec wmav2 -vn $dest
    album_art_maxwidth: 0
    dest:
    auto: no
    threads: 4
    copy_album_art: no
    tmpdir:
    max_bitrate: 500

    paths: {}
    pretend: no
smartplaylist:
    relative_to: ~/media/music
    playlist_dir: ~/.mpd/playlists
    playlists:
    -   name: all.m3u
        query: ''
    -   name: Rock.m3u
        query: genre:rock
    -   name: Metal.m3u
        query: genre:metal
    -   name: Rap.m3u
        query: genre:rap
    -   name: Space.m3u
        query: ['artist:Ben Prunty', 'artist:Keldian', 'album:Space metal']
    -   name: Power Metal.m3u
        query: genre:Power Metal
    -   name: Symphonic Metal.m3u
        query: genre:Symphonic Metal
    auto: yes
embedart:
    remove_art_file: yes
    compare_threshold: 0
    auto: yes
    ifempty: no
    maxwidth: 0
replaygain:
    backend: gstreamer
    targetlevel: 89
    auto: yes
    overwrite: no
ihate:
    warn: ['album:christmas', 'genre:polka']
    skip: []
library: ~/media/music/.lib/musiclibrary.blb

plugins: chroma fetchart embedart mpdstats ihate smartplaylist replaygain convert fetchart lastgenre fuzzy
directory: ~/media/music

import:
    move: no
lastgenre:
    count: 1
    source: album
    prefer_specific: no
    force: yes
    min_weight: 10
    auto: yes
    whitelist: yes
    separator: ', '
    fallback:
    canonical: no
fetchart:
    auto: yes
    minwidth: 0
    sources:
    - filesystem
    - coverart
    - itunes
    - amazon
    - albumart
    google_engine: 001442825323518660753:hrh5ch1gjzm
    enforce_ratio: no
    cautious: no
    maxwidth: 0
    store_source: no
    google_key: REDACTED
    fanarttv_key: REDACTED
    cover_names:
    - cover
    - front
    - art
    - album
    - folder
fuzzy:
    threshold: 0.7
    prefix: '~'
mpd:
    rating: yes
    rating_mix: 0.75
    host: localhost
    music_directory: /home/tmplt/media/music
    password: REDACTED
    port: 6600
chroma:
    auto: yes