How can i preserve flv custom metadata when using ffmpeg

How can i preserve flv custom metadata when using ffmpeg

References

Reference NO 1

http://stackoverflow.com/questions/15204601/how-can-i-preserve-flv-custom-metadata-when-using-ffmpeg

Reference NO 2

http://stackoverflow.com/questions/18211683/ffmpeg-how-do-i-render-a-flv-from-multiple-png-while-saving-the-alpha-channel

Reference NO 3

http://www.johnrockefeller.net/using-ffmpeg-to-convert-mpg-or-mov-to-flv/

Reference NO 4

http://superuser.com/questions/556029/ffmpeg-converts-flv-video-to-gif-with-awful-quality

Reference NO 5

http://ffmpeg.org/pipermail/ffmpeg-user/2013-February/013783.html

Reference NO 6

http://new2javas.blogspot.com/2013/04/converting-audiovideo-files-using-ffmpeg.html

Reference NO 7

http://comments.gmane.org/gmane.comp.video.ffmpeg.user/44149

Reference NO 8

http://linux.die.net/man/1/ffmpeg