how to add a text stream (subtitle) into a .mp4 or .m4v

I use ffmpeg to convert video us开发者_Go百科ing H264 for video encoding, and FAAC for audio encoding. The output should be .mp4 or m4v in order to play on both Android and iPhone. I want to add a subtitle STREAM to video file using ffmpeg, but the ffmpeg's documentation doesnt help much.

Can anyone help me with this?

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Is it possible for you to use mencoder instead of ffmpeg? If yes, I would suggest the following:

mencoder input.avi -sub subtitles.sub -ovc lavc -oac copy -o output.mp4

For ffmpeg you can also try out the following command, although I have no way to guarantee it is actually working:

ffmpeg -i inputfile.avi -i subtitlefile.srt outputfile.avi -newsubtitle

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I have this command works under windows7:

ffmpeg -i input.mkv -filter_complex [0:v][0:s]overlay[v] -map [v] -map 0:a -acodec libvo_aacenc -ac 2 -ar 48000 -ab 320k output.mp4

You can refer to http://ffmpeg.org/trac/ffmpeg/wiki/How%20to%20burn%20subtitles%20into%20the%20video#picturebasedsubtitles for official descriptions.