permanent subs 3d mkv/mp4

[gentoorockerfr]

How can i embed subs in a 3d video(mkv/mp4)?
i tried with handbrake .
i think that i have to make this result -->>
http://www.supportforum.philips.com/en/attachment.php?attachmentid=605&d=1321832995
so how can i add a subtitle twice in a stereoscopic video?

[syn0ptik]

ffmpeg -i INPUT -attach DejaVuSans.ttf -metadata:s:2 mimetype=application/x-truetype-font out.mkv
and play with crop's for equals pictures left and right.

[gentoorockerfr]

in example i have the 3d video file movie.mp4/mkv and the subtitle movie.srt
which is the right command to make the subtitle permanent and double(stereoscopic)?(as the above image)

ffmpeg -i movie.mp4 -attach DejaVuSans.ttf -metadata:s:2 mimetype=application/x-truetype-font out.mkv ??where tells the command about srt file?

[gentoorockerfr]

Any help please?
The queastion is how to place the subtitles x2 times (on each half) ?avimerge set them at center..

[syn0ptik]

here, it like this, but it for usual video data, it creates new stream in output mkv file, so mp4 file can't be outputed.
ffmpeg -i movie.mp4 -attach subs.srt -metadata:s:2 mimetype=application/x-truetype-font out.mkv
also for 3d movies it should works only if you play around crop's filters

[gentoorockerfr]

i executed this command and the new video(out.mkv) has not embedded subtitles.

[syn0ptik]

ffprobe out.mkv
is not showing subtitles streams to?
What's your ffmpeg version?