Encoding ONLY subtitle in MP4 with mencoder without change video and audio

[nkostov]

Hi all,
i want to encode subtitle into MP4 video file from command line program, without changing video and audio. I used mencoder.exe, but I can not set the appropriate command line options and output file is always done with changed resolution. Can anyone help me with settings or suggest another command line program ?

Thank You.

[Baldrick]

I guess you want burned in subtitles? If not then mux the subs in the mp4 using mp4box.

[nkostov]

Hi Baldrick,
yes I want burned in subtitles, not to mux them. I need only the basic option for mencoder to burn in subtitle without change the video/audio quality.

Thank You.

[Ai Haibara]

It's not possible to burn-in subtitles without re-encoding - and every re-encoding causes quality loss, so you can't do it without some change in the quality.

[nkostov]

Any other suggestion?

[Baldrick]

So you are okey with reencoding? or else it's not possible.

Just set the resolution to the same size as the source?

[nkostov]

thank you all, i will try to re-encode.