Make the video encoding user configurable

sigal/gallery.py

@@ -291,7 +291,8 @@ def process_video(filepath, outpath, settings):
         shutil.copy(filepath, join(outpath, settings['orig_dir'], filename))
 
     # TODO: Add specific video size settings
-    sigal.video.generate_video(filepath, outname, settings['img_size'])
+    sigal.video.generate_video(filepath, outname, settings['img_size'],
+            settings['webm_options'])
 
     if settings['make_thumbs']:
         thumb_name = join(outpath, get_thumb(settings, filename))

sigal/settings.py

@@ -37,6 +37,7 @@ _DEFAULT_CONFIG = {
     'keep_orig': False,
     'orig_dir': 'original',
     'jpg_options': {'quality': 85, 'optimize': True, 'progressive': True},
+    'webm_options': {'crf': '10', 'bitrate': '1.6M', 'qmin': '4', 'qmax': '63'},
     'copyright': '',
     'img_ext_list': ['.jpg', '.jpeg', '.JPG', '.JPEG', '.png'],
     'vid_ext_list': ['.MOV', '.mov', '.avi', '.mp4', '.webm', '.ogv'],

sigal/templates/sigal.conf.py

@@ -16,7 +16,7 @@ source = 'pictures'
 # - colorbox (default), galleria, or the path to a custom theme directory
 theme = 'galleria'
 
-# Size of resized image
+# Size of resized image (default: (640, 480))
 img_size = (800, 600)
 
 # Pilkit processor used to resize the image
@@ -55,6 +55,16 @@ thumb_size = (280, 210)
 #                'optimize': True,
 #                'progressive': True}
 
+# Webm options
+# Options used in ffmpeg to encode the webm video. You may want to read
+# http://ffmpeg.org/trac/ffmpeg/wiki/vpxEncodingGuide
+# Be aware of the fact these options need to be passed as strings.
+# webm_options = {'crf': '10',
+#                 'bitrate': '1.6M',
+#                 'qmin': '4',
+#                 'qmax': '63'}
+
+
 # Write HTML files. If False, sigal will only process the images.
 # write_html = True
 

sigal/video.py

@@ -25,7 +25,7 @@ import subprocess
 import os
 import sigal.image
 
-def generate_video(source, outname, size, options=[]):
+def generate_video(source, outname, size, options={}):
     """Video processor
 
     :param source: path to an image
@@ -42,9 +42,13 @@ def generate_video(source, outname, size, options=[]):
     # http://ffmpeg.org/trac/ffmpeg/wiki/vpxEncodingGuide
     (w, h) = size
     with open("/dev/null") as devnull:
-        subprocess.call(['ffmpeg', '-i', source, '-y', '-crf', '10',
-            '-b:v', '1.6M','-vf', "scale=%i:trunc(ow/a/2)*2'" % w] +
-            options + [outname], stderr=devnull)
+        subprocess.call(['ffmpeg', '-i', source, '-y',
+            '-crf', options.get('crf', '10'),
+            '-b:v', options.get('bitrate', '1.6M'),
+            '-qmin', options.get('qmin', '4'),
+            '-qmax',options.get('qmax', '63'),
+            '-vf', "scale=%i:trunc(ow/a/2)*2'" % w,
+            outname], stderr=devnull)
 
 def generate_thumbnail(source, outname, box, format, fit=True, options=None):
     "Create a thumbnail image"