mp3转m4a

在linux 下用ffmpeg 进行转码，进入到ffmpeg所在目录：

./ffmpeg -i input.mp3 -c:a aac -b:a 32k output.m4a

./ffmpeg -i input.mp3 -c:a libfdk_aac -vbr 5 output.m4a

参考文档：

https://superuser.com/questions/370625/ffmpeg-command-to-convert-mp3-to-aac
https://blog.csdn.net/xing_____/article/details/79615604
http://www.idcspy.org/linux-course-install.html

mp3转m4a

原文：https://www.cnblogs.com/forest-sunshine/p/14110577.html