++ slide capture [s] in mplayer
++ reformat time in table as mm:ss
++ move to GraphicsMagick (supports multi-core)
++ display pictures (slides) while editing
++ calculate exact pre-roll timeout for OSD
++ jump to correct position in subtitles.srt.yaml on F12
+- render subtitles with slide mark [42] in html
+- convert all media/*/www to mirror www.sh script