0

I use ffmpeg to embed .ssa subtitles into mkv, but ffprobe recognizes that the subtitle is ass format.

ffmpeg -i input.avi -i input.ssa -map 0:0 -map 0:1 -map 1:0 -c copy demo.mkv

Also, I learned that ssa subtitles also support MP4, but when I use the command to convert to MP4 that ffmpeg report error：could not find tag for codec ass in stream #2, codec not currently supported in container enter image description here enter link description here

How can I solve this problem？

Improve this question

1 Answer 1

Reset to default
1

Mp4 container needs you specify the subtitle codec to use.
Add : -c:s mov_text
Like that :
ffmpeg -i input.avi -i input.ssa -map 0:0 -map 0:1 -map 1 -c copy -c:s mov_text demo.mp4

Improve this answer
7
  • Thank you for your help！It's worked. There is identified "subtitle: mov_text" by FFprobe, but I need ssa subtitle. If I use the code like that: ffmpeg -i input.avi -i input.ssa -map 0:0 -map 0:1 -map 1 -c copy -c:s ssa demo.mkv An error reported that: Subtitle codec 94212 is not supoorted
    – mm_test
    Feb 27 at 8:56
  • @mm_test As you asked to convert to mp4 and ssa subtitles are not supported by the mp4 container, I proposed a conversion to mov_text. If you want to keep the matroska (mkv) container, ssa subtitles are supported. Normally your last command is correct. Codec 94212 matches ssa well. Check your version of ffmpeg.
    – Alain1A45
    Feb 27 at 12:53
  • Should I change the version of ffmpeg for keeping the matroska (mkv) container, ssa subtitles are supported. When I enter ‘ffmpeg -version'，it's shown that: ffmpeg version N-68994-g4df01d5 Copyright (c) 2000-2015 the FFmpeg developers. Is it too old for Codec 94212?
    – mm_test
    Feb 28 at 8:28
  • 1
    @mm_test Your version is really very old. You would do well to update to benefit from bug fixes and improvements. There are releases for all platforms.
    – Alain1A45
    Feb 28 at 13:40
  • 1
    "ssa" stands for SubStation Alpha version 4.00 and "ass" stands for Advanced SubStation Alpha, the most advanced version 4.00+
    – Alain1A45
    Mar 1 at 4:18

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.