Update README.md

README.md

@@ -18,7 +18,11 @@ flac2pod --help
 ```
 flac2pod-flacgain <source_dir>
 ```
-...to tag your FLAC library with ReplayGain data.
+...to tag your FLAC library with ReplayGain data, or run...
+```
+flac2pod-artconvert <source_dir>
+```
+...to convert embedded PNGs (in MP4/M4A files) to iPod-ready JPEGs.
 
 In order for flac2pod to function, your source_dir must be structured as follows:
 

lib/flac2pod-artconvert.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+
+from argparse import ArgumentParser
+from flac2pod import scan_source
+from mutagen import mp4
+from mutagen.mp4 import MP4Cover
+from os import listdir
+from PIL import Image
+
+if __name__ == "__main__":
+    parser = ArgumentParser(description='Convert embedded album art in MP4/M4A files from PNGs to iPod-compatible '
+                                        'JPEGs.')
+    parser.add_argument('source_dir', nargs='+',
+                        help='directory tree containing music files - folder must contain library sorted into artists '
+                             'and albums')
+    args = parser.parse_args()
+
+    if args.source_dir[0].endswith('/'):
+        source = args.source_dir[0][:-1]
+    else:
+        source = args.source_dir[0]
+
+    source_directories = scan_source(source)
+
+    for album in sorted(source_directories[0]):
+        for song in listdir(album):
+            audio = mp4.MP4(f"{album}/{song}")
+            if audio.tags is None:
+                continue
+            if "covr" not in audio.tags:
+                continue
+            cover = audio.tags["covr"][0]
+            print(f"[{album}/{song}] Converting...")
+            open("/tmp/cover.png", "wb").write(cover)
+            image = Image.open("/tmp/cover.png")
+            image.thumbnail((300, 300))
+            image.save("/tmp/cover.jpeg", "JPEG", quality=50)
+            with open("/tmp/cover.jpeg", "rb") as f:
+                audio["covr"] = [
+                    MP4Cover(f.read(), imageformat=MP4Cover.FORMAT_JPEG)
+                ]
+            audio.save()

lib/flac2pod-flacgain.py

@@ -7,7 +7,6 @@ from os import listdir, system
 from subprocess import PIPE, run
 from sys import exit as s_exit
 
-# argument parsing
 if __name__ == "__main__":
     parser = ArgumentParser(description='Quickly tag your FLAC library with ReplayGain data using metaflac.')
     parser.add_argument('source_dir', nargs='+',
@@ -64,5 +63,3 @@ if __name__ == "__main__":
 
         else:
             print(f"[{album}/*] ReplayGain data is already present.")
-
-    s_exit(0)

lib/flac2pod.py

@@ -102,9 +102,13 @@ def scan_destination_convert():
                     _bake_args, _flac2pod_rg_tags = '', f"-metadata comment='FLAC2PODRG#{_rggain}#{_rgpeak}#'"
                 else:
                     _bake_args, _flac2pod_rg_tags = '', ''
+                if args.preserve:
+                    _art_args = '-c:v copy -map_metadata 0:g'
+                else:
+                    _art_args = '-vn'
                 # generate the appropriate ffmpeg command
-                _cmd = f"screen -DmS flac2pod{_i} ffmpeg -i {_file_s} -c:a aac -ab 256k {_bake_args} -map_metadata 0 " \
+                _cmd = f"screen -DmS flac2pod{_i} ffmpeg -i {_file_s} {_art_args} -c:a aac -b:a 256k {_bake_args} " \
-                       f"{_flac2pod_rg_tags} -aac_pns 0 -movflags +faststart -vn {_file_d} </dev/null"
+                       f"{_flac2pod_rg_tags} -aac_pns 0 -movflags +faststart {_file_d} </dev/null"
                 if _rggain is not None:
                     print(f"\u001b[38;5;0;48;5;15mGain adjustment: {_rggain}dB\u001b[0m")
                 else:
@@ -131,11 +135,13 @@ if __name__ == "__main__":
     parser.add_argument('destination_dir', nargs='+',
                         help='destination parent directory for output - will be created if it does not already exist')
     parser.add_argument('-b', '--bake', action='store_true',
-                        help='bake (encode) ReplayGain values into the file')
+                        help='bake (encode) ReplayGain values into output files')
     parser.add_argument('-a', '--albumgain', action='store_true',
                         help='read ReplayGain album gain instead of ReplayGain track gain')
     parser.add_argument('-x', '--stopifnogain', action='store_true',
                         help='stop flac2pod if ReplayGain data cannot be found in a file')
+    parser.add_argument('-p', '--preserve', action='store_true',
+                        help='copy album art from input files')
     args = parser.parse_args()
 
     if args.source_dir[0].endswith('/'):
@@ -150,5 +156,3 @@ if __name__ == "__main__":
     source_directories = scan_source(source)
     create_destination()
     scan_destination_convert()
-
-    s_exit(0)

package.sh

@@ -19,6 +19,7 @@ echo -e '\npackaging as generic...\n'
 mkdir -p output/generictemp/usr/{bin,lib/flac2pod}
 cp -r lib/. output/generictemp/usr/lib/flac2pod/
 ln -s /usr/lib/flac2pod/flac2pod.py output/generictemp/usr/bin/flac2pod
+ln -s /usr/lib/flac2pod/flac2pod-artconvert.py output/generictemp/usr/bin/flac2pod-artconvert
 ln -s /usr/lib/flac2pod/flac2pod-flacgain.py output/generictemp/usr/bin/flac2pod-flacgain
 cp -r share output/generictemp/usr/
 tar -C output/generictemp -cvJf output/flac2pod-"$version".tar.xz usr/
@@ -37,7 +38,7 @@ pkgdesc='Converts your FLAC library to be iPod-ready'
 url='https://github.com/rwinkhart/flac2pod'
 arch=('any')
 license=('GPL2')
-depends=(ffmpeg flac python python-mutagen screen)
+depends=(ffmpeg flac python python-mutagen python-pillow screen)
 source=(\""$source"\")
 sha512sums=('"$sha512"')
 

share/licenses/flac2pod/license

@@ -1,5 +1,5 @@
     flac2pod is a FOSS audio transcoding script for preparing music for an Apple iPod.
-    Copyright (C) 2022  Randall Winkhart  idgr@tutanota.com
+    Copyright (C) 2022-2023  Randall Winkhart  idgr@tutanota.com
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by