FFmpeg, harcoding subtitles and choosing the audio track?

sgno1

I have a video which has multiple audio tracks (dual-audio) and multiple subtitles, I use the follow command to hardcode (burn-in) subtitles when converting from .MKV to .MP4

ffmpeg -i 'INPUT_OF_MKV' -acodec aac -crf 21 -preset veryfast -filter_complex subtitles='INPUT_OF_MKV:si=0' 'OUTPUT_IN_MP4.mp4'    

This works fine for selecting the correct subtitles but I cannot seem to figure out how to choose the right audio track, it defaults it to the first audio track, but I would like to choose the 2nd one while burning-in subtitles. Any ideas?

Gary

You want to use -map.

https://trac.ffmpeg.org/wiki/Map

benj0x

Did you try using stream specifiers (and take a look at how mapping works.)?

I guess you would need "-map 0:0" (stream 0 to stream 0) to map the right audio source to the right destination.

sgno1

@Gary said:
You want to use -map.

https://trac.ffmpeg.org/wiki/Map

Thanks! Worked!

sgno1

@benj0x said:
Did you try using stream specifiers (and take a look at how mapping works.)?

I guess you would need "-map 0:0" (stream 0 to stream 0) to map the right audio source to the right destination.

Yep, used a slightly different map technique but thanks again!