<div dir="ltr"><div class="gmail_default" style="font-family:georgia,serif">Hi there,</div><div class="gmail_default" style="font-family:georgia,serif"><br></div><div class="gmail_default" style="font-family:georgia,serif">According to this <a href="https://trac.ffmpeg.org/wiki/Encode/HighQualityAudio">https://trac.ffmpeg.org/wiki/Encode/HighQualityAudio</a></div><div class="gmail_default" style="font-family:georgia,serif"><br></div><div class="gmail_default" style="font-family:georgia,serif"><i><span style="color:rgb(0,0,0);font-family:Verdana,Arial,"Bitstream Vera Sans",Helvetica,sans-serif;font-size:13px">To calculate the bitrate to use for multi-channel audio: (bitrate for stereo) x (channels / 2).</span><br style="color:rgb(0,0,0);font-family:Verdana,Arial,"Bitstream Vera Sans",Helvetica,sans-serif;font-size:13px"><span style="color:rgb(0,0,0);font-family:Verdana,Arial,"Bitstream Vera Sans",Helvetica,sans-serif;font-size:13px">Example for 5.1(6 channels) Vorbis audio: 128Kbps x (6 / 2) = 384Kbps</span></i><br></div><div class="gmail_default" style="font-family:georgia,serif"><span style="color:rgb(0,0,0);font-family:Verdana,Arial,"Bitstream Vera Sans",Helvetica,sans-serif;font-size:13px"><br></span></div><div class="gmail_default" style="font-family:georgia,serif"><span style="color:rgb(0,0,0);font-family:Verdana,Arial,"Bitstream Vera Sans",Helvetica,sans-serif;font-size:13px">Is it true for every encoder that supports multi-channel?</span></div><div class="gmail_default" style="font-family:georgia,serif"><span style="color:rgb(0,0,0);font-family:Verdana,Arial,"Bitstream Vera Sans",Helvetica,sans-serif;font-size:13px"><br></span></div><div class="gmail_default" style="font-family:georgia,serif"><span style="color:rgb(0,0,0);font-family:Verdana,Arial,"Bitstream Vera Sans",Helvetica,sans-serif;font-size:13px">Is it ture for every encoder to use just bitarte/2 when encoding to mono (like mp3) ? Because when encoding to stereo mp3 jointely encode both channels so that compression can be imporved so when it's down to one channel, should the bitrate > bitrate / 2?</span></div><div class="gmail_default" style="font-family:georgia,serif"><span style="color:rgb(0,0,0);font-family:Verdana,Arial,"Bitstream Vera Sans",Helvetica,sans-serif;font-size:13px"><br></span></div><div class="gmail_default" style="font-family:georgia,serif"><span style="color:rgb(0,0,0);font-family:Verdana,Arial,"Bitstream Vera Sans",Helvetica,sans-serif;font-size:13px"><br></span></div><div class="gmail_default" style="font-family:georgia,serif"><span style="color:rgb(0,0,0);font-family:Verdana,Arial,"Bitstream Vera Sans",Helvetica,sans-serif;font-size:13px">Thanks for help!</span></div><div class="gmail_default" style="font-family:georgia,serif"><span style="color:rgb(0,0,0);font-family:Verdana,Arial,"Bitstream Vera Sans",Helvetica,sans-serif;font-size:13px"><br></span></div><div class="gmail_default" style="font-family:georgia,serif"><span style="color:rgb(0,0,0);font-family:Verdana,Arial,"Bitstream Vera Sans",Helvetica,sans-serif;font-size:13px"><br></span></div></div>