fix(video/stats.fish): ignore header while sorting

video/stats.fish

@@ -13,22 +13,22 @@ end
 set extract __t-nil_helper_extract
 
 
-filter_by_video | while read f
+while read f
      echo -ne $f\t
 
      set blah (ffprobe -v error -select_streams v -show_entries stream=width,height,r_frame_rate:format=duration,bit_rate -of default=noprint_wrappers=1 $f 2>/dev/null | string trim)
      set duration ($extract duration $blah)
      set width ($extract width $blah)
      set height ($extract height $blah)
-     set fps ($extract r_frame_rate $blah)
+     set fps (math ($extract r_frame_rate $blah))  # we often get FPS as ratio in FFprobe. That converts it to a classical number
      set bit_rate ($extract bit_rate $blah)
 
      # if all values are there, calc bits per pixel
-     for x in blah width height fps bit_rate
+     for x in width height fps bit_rate
          $is_numeric $$x || set bits_per_pixel "N/A"
      end
 
-     set -q bits_per_pixel && [ "$bits_per_pixel" != "N/A" ] && set bit_rate (math $bit_rate / \( $width \* $height \* $fps \) )
+     set -q bits_per_pixel || [ "$bits_per_pixel" != "N/A" ] && set bits_per_pixel (math $bit_rate / \( $width \* $height \* $fps \) )
 
      # formatting at the end, so values can be used for calculations until then
 
@@ -41,4 +41,4 @@ filter_by_video | while read f
 end | pv -l | column --separator=\t --output-separator=\t --table \
                   --table-columns 'FILE,DURATION,BIT RATE,RESOLUTION,FPS,BITS PER PIXEL' \
                   --table-right 'DURATION,BIT RATE,RESOLUTION,FPS,BITS PER PIXEL' \
-| sort -nt\t -k$_flag_sort_by
+| begin; sed -u 1q; sort -nt\t -k$_flag_sort_by; end  # sed trick ignores header for sorting