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How can I change the subtitle format of a movie to .srt for example?

I have any movie (sound, video and an embedded subtitle). I just want to change the subtitles to .srt while leaving everything else the same. If there is a better way to do that than with ffmpeg, then I'd be fine with that too.

Current state

audio codec: x, video codec: y, subtitle format: z

Desired state

audio codec: x, video codec: y, subtitle format: .srt

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3 Answers 3

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+50

FFmpeg has a SubRip encoder, so

ffmpeg -i input.mkv -c copy -c:s srt out.mkv
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5
  • Error while opening encoder for output stream #0:2 - maybe incorrect parameters such as bit_rate, rate, width or height. Any idea why this is happening?
    – user2765654
    Commented Jun 27, 2016 at 16:36
  • Stream mapping: Stream #0:0 -> #0:0 (copy) Stream #0:1 -> #0:1 (copy) Stream #0:3 -> #0:2 (dvd_subtitle (dvdsub) -> subrip (srt)) Error while opening encoder for output stream #0:2 - maybe incorrect parameters such as bit_rate, rate, width or height
    – user2765654
    Commented Jun 27, 2016 at 18:29
  • See here.
    – Gyan
    Commented Jun 27, 2016 at 18:32
  • 1
    Full list of subtitle formats supported by ffmpeg: ffmpeg.org/ffmpeg-all.html#Subtitle-Formats
    – ccpizza
    Commented Aug 13, 2021 at 15:04
  • webvtt for VTT fonts
    – akostadinov
    Commented Mar 3 at 22:46
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Assuming 'z' is a supported format, something as simple as this should work:

ffmpeg -i input.z output.srt

List your codecs with ffmpeg -codecs to make sure your 'z' type is supported.

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1
  • webvtt for VTT fonts
    – akostadinov
    Commented Mar 3 at 22:46
2

You can try to convert the subtitles using a simple tool called Avidemux. I've used it before and it works fine. Find more about it here.

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