![]() ![]() ![]() ![]() So, it makes me think maybe it's not really CBR?Īnd althought "-b:a" is supossed to make CBR, when compressing only audio, MediaInfo always reports Variable Bitrate, so no bitrate is visible with it.įfmpeg -i "1min stereo.wav" -c:a aac -b:a 64k -ac 1 "1min 64kb mono.aac" MediaInfo also reports a strange 64.5 kbps bitrate (when I wrote 64k), with 2 channels, 1 original channel and Front C position:ġ92k -> 159Kbps and Variable (with a max bitrate of 192Kbps) % ffmpeg -i input -c:v libx264 -b:v 750k -profile:v baseline -level 3.0 -pix_fmt yuv420p -c:a aac -b:a 64k -ac 1 outputįfmpeg version FFmpeg version: 20170330-ad7aff0 When converting stereo to mono, even it seems to really convert to mono, it's been reported as stereo and with a strange bitrate (not CBR?) by MediaInfo and VLC. ![]()
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