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I read on another question here on superuser that for converting from MKV to MP4 and hardcoding subs i have to use mkvextract and avidemux, i tried to do it, and basically it worked but... the subtitles are about 20ms before the video, there's some way to put delay on the subtitles?

Celeste Capece
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Are you asking if you can shift subtitles that have already been placed in video stream? Look into this answer which basically states that it is not possible.

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Dawid Stróżak
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  • No, i have the .ass files and the raw videos, i have to put the subtitles on the video, but i can't match the timing cause i should have to delay the subs, and i don't know how should i do it – Celeste Capece Mar 25 '15 at 18:33
  • I believe this program can do what you need: [Subtitle Edit](https://github.com/SubtitleEdit/subtitleedit/releases/tag/3.4.6) This guide should also help you: [Ehow](http://www.ehow.com/how_12211824_edit-sub-timing.html) – Dawid Stróżak Mar 29 '15 at 14:08
  • that should do, anyway if i extracted the subtitles from a mkv where they was placed with the right timing, why they have the wrong timing after rejoining them with video? – Celeste Capece Mar 29 '15 at 20:37
  • Do you mean that whenever you hardcode the subtitles their sync changes? That must have something to do with the program you use. I cannot really tell you exactly what causes this issue as I am not sure what you have used. – Dawid Stróżak Apr 01 '15 at 11:46
  • i wrote it, i used mkvextract to get subtitles, then avidemux to hardcode them – Celeste Capece Apr 02 '15 at 16:17
  • if you are using ubuntu [this](http://askubuntu.com/questions/106259/what-apps-to-sync-movie-subtitles-easily-are-available-for-ubuntu/106261#106261) might help you. There is also similar thread in [here](http://avidemux.org/smuf/index.php?topic=12091.0). – Dawid Stróżak Apr 04 '15 at 13:34