Changed CRF for create_video tasks from 23 to 20

We need less compression for the Spring edit.

flamenco_worker/commands.py

@@ -1361,7 +1361,7 @@ class CreateVideoCommand(AbstractFFmpegCommand):
     pix_fmt = 'yuv420p'
 
     # Select some settings that are useful for scrubbing through the video.
-    constant_rate_factor = 23
+    constant_rate_factor = 20
     keyframe_interval = 18  # GOP size
     max_b_frames: typing.Optional[int] = 0
 

tests/test_commands_create_video.py

@@ -59,7 +59,7 @@ class CreateVideoTest(AbstractCommandTest):
             '-f', 'concat',
             '-i', Path(self.settings['input_files']).absolute().with_name('ffmpeg-input.txt').as_posix(),
             '-c:v', 'h264',
-            '-crf', '23',
+            '-crf', '20',
             '-g', '18',
             '-vf', 'pad=ceil(iw/2)*2:ceil(ih/2)*2',
             '-pix_fmt', 'yuv420p',
@@ -81,7 +81,7 @@ class CreateVideoTest(AbstractCommandTest):
             '-pattern_type', 'glob',
             '-i', '/tmp/*.png',
             '-c:v', 'h264',
-            '-crf', '23',
+            '-crf', '20',
             '-g', '18',
             '-vf', 'pad=ceil(iw/2)*2:ceil(ih/2)*2',
             '-pix_fmt', 'yuv420p',