<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><span style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;">Hi, guys </span><br style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;"><br style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;"><span style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;">Thanks for your time to read my email first. I’m new about audio, but I have to make this done: </span><br style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;"><br style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;"><span style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;">1. Add a few bytes of data to a sound file and generate a new sound file. </span><br style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;"><span style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;">2. If I convert that file to any sound format, these bytes data should still there. </span><br style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;"><span style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;">3. When I play that file anywhere, I pick up the sound with mobile phone microphone and got these bytes back. </span><br style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;"><br style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;"><span style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;">The most important is “Encoding” and “Decoding”, can FFmpeg encode and decode? Like this paper said: </span><a href="http://www.ijstr.org/final-print/july2012/Hiding-Text-In-Audio-Using-Multiple-LSB-Steganography-And-Provide-Security-Using-Cryptography.pdf" rel="nofollow" link="external" style="color: rgb(85, 26, 139); font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;">HIDING TEXT IN AUDIO USING MULTIPLE LSB <br style="color: inherit;">STEGANOGRAPHY AND PROVIDE SECURITY <br style="color: inherit;">USING CRYPTOGRAPHY</a><br style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;"><br style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;"><span style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;">Thank you in advance for any help you might be able to provide. </span><br style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;"><br style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;"><span style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;">Best Regards, </span><br style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;"><span style="font-family: Verdana, Geneva, Helvetica, Arial, sans-serif;">Mani Wang</span></div></body></html>