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I'm using ffmpeg to convert some old videos. Some have VobSub subtitles, so I am hardcoding them in. Is there a way to add a semi transparent box behind the subtitles for easier reading?

maddogandnoriko
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    Those subtitles have a .idx file, right? To improve readability, have you tried changing the palette in that file? Or instead of drawing a box, would it be possible to burn the same subtitles all in black and a little bit bigger and then burn them again all in white? – Hernán Alarcón Aug 23 '20 at 03:13
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    You can use drawbox filter to make a transparent box, but timing it with the subtitles would be tedious. Here's an [example](https://video.stackexchange.com/a/15554) for a single phrase. – llogan Aug 23 '20 at 19:29
  • @Hernán No idx that I know of. They're embedded in an mkv file. – maddogandnoriko Aug 24 '20 at 00:06
  • @llogan Thank sounds like a lot of timing. I thought maybe it'd do it by itself. Thanks. I'll just leave as is. – maddogandnoriko Aug 24 '20 at 00:08

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