No longer setting explicit width, so that ffmpeg can take care of odd number oddness

pipeline/handlers/transcode.py

@@ -83,7 +83,10 @@ def _do_transcode(inpath, outpath, maxheight, encoder='software'):
 
     # Scale the output if necessary
     if scale < 1:
-        videosettings_out['vf'] = f'scale={width}:{height}'
+        # The width must be an even number.
+        # Setting width to -2 will allow ffmpeg to automatically deal with
+        # any scalings where the width would have become odd.
+        videosettings_out['vf'] = f'scale=-2:{height}'
 
     # Apple prores is incompatible with nvidia hardware,
     # so ignore request for hardware acceleration in that case