![]() ![]() ffmpeg -i input.mp3 -c:a libfdk_aac -b:a 128k output.m4a You can often choose something lower as well. 128 kBit/s should be good enough for most situations. ffmpeg -i input.mp3 -c:a libfdk_aac -vbr 4 output.m4aįor fixed bitrate (CBR), use the -b:a option, for example -b:a 128k. For example, -vbr 4 is a good choice (roughly 128 kBit/s for stereo audio). To change the quality, you have two options:įor variable bitrate (VBR), use the -vbr option. ffmpeg -i input.mp3 -c:a libfdk_aac output.m4a libfdk_aac is the Fraunhofer AAC encoder, and it is available when you compiled FFmpeg with support for it. This is the most basic FFmpeg command to convert input to AAC audio using the highest quality AAC FFmpeg has.
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