#20 Bugfix: Resize the cover image (max allow: 640x640, same as 163), thus can reduce the file size.

ncm/downloader.py

@@ -7,6 +7,7 @@ import requests
 from ncm import config
 from ncm.api import CloudApi
 from ncm.file_util import add_metadata_to_song
+from ncm.file_util import resize_img
 
 
 def download_song_by_id(song_id, download_folder, sub_folder=True):
@@ -59,6 +60,9 @@ def download_song_by_song(song, download_folder, sub_folder=True):
     cover_file_name = 'cover_{}.jpg'.format(song_id)
     download_file(cover_url, cover_file_name, song_download_folder)
 
+    # resize cover
+    resize_img(os.path.join(song_download_folder, cover_file_name))
+
     # add metadata for song
     song_file_path = os.path.join(song_download_folder, song_file_name)
     cover_file_path = os.path.join(song_download_folder, cover_file_name)

ncm/file_util.py

@@ -2,6 +2,19 @@
 
 from mutagen.mp3 import MP3, HeaderNotFoundError
 from mutagen.id3 import ID3, APIC, TPE1, TIT2, TALB, error
+from PIL import Image
+
+
+def resize_img(file_path, max_size=(640, 640), quality=90):
+    try:
+        img = Image.open(file_path)
+    except IOError:
+        print('Can\'t open image:', file_path)
+        return
+
+    if img.size[0] > max_size[0] or img.size[1] > max_size[1]:
+        img.thumbnail(max_size, Image.ANTIALIAS)
+        img.save(file_path, quality=quality)
 
 
 def add_metadata_to_song(file_path, cover_path, song):

requirements.txt

@@ -1,3 +1,4 @@
 requests>=2.17.3
 pycrypto>=2.6.1
 mutagen>=1.38.0
+Pillow>=4.3.0

setup.py

@@ -9,6 +9,7 @@ setup(
         'requests>=2.17.3',
         'pycrypto>=2.6.1',
         'mutagen>=1.38.0',
+        'Pillow>=4.3.0',
     ],
 
     entry_points={