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Currently, I do it this way: ffmpeg -i video.mkv -vf subtitles=video.mkv out.mp4 But with some videos, it takes too long around 55mins but with handbrake, it takes only 10 mins to burn subtitle to video even though I tweaked the setting for instances enabling ultrafast mode. Is there a way to increase the speed of that: maybe saving output files with the lesser quality or something?

Yatinj Sutariya
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Ahmed Yasir
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  • for handbrake , preset is 'very fast 1080p' and encoder preset is 'ultrafast' , for ffmpeg i only used 'ffmpeg -i video.mkv -vf subtitles=video.mkv out.mp4' is there way to speed the process? – Ahmed Yasir Mar 19 '21 at 17:30

1 Answers1

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Use a x264 -preset:

ffmpeg -i video.mkv -vf subtitles=video.mkv -preset ultrafast out.mp4

If video.mkv contains AAC audio, then add the -c:a copy output option to stream copy the audio instead of re-encoding it.

llogan
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  • thank you so much for the answer , are they any cons of using ultrafast mode or fast in general. – Ahmed Yasir Mar 24 '21 at 12:17
  • @AhmedYasir Faster presets are less efficient at compression, so file size will be bigger. Use the slowest preset you can. – llogan Mar 24 '21 at 16:12