How to encode and split an audio file in FFmpeg using asplit

Question

I am trying to turn and split an audio file into two separate mp3 files with different qualities;

• One at 128k
• One at 320k

What I 've come up so far is this:

ffmpeg -i myaudiofile.wav [i1]asplit=2[o1][o2] \
-map [o1] -acodec libmp3lame -ar 48000 -ab 192k -ac 2 win1.mp3 \
-map [o2] -acodec libmp3lame -ar 48000 -ab 320k -ac 2 win2.mp3

Unfortunately this doesn't work. Any ideas?

Thanks in advance.

Answer 1

Use this:

ffmpeg -i myaudiofile.wav -filter_complex "asplit=2[o1][o2]" -map [o1] \
-acodec libmp3lame -ar 48000 -ab 192k -ac 2 win1.mp3 -map [o2] -acodec \
libmp3lame -ar 48000 -ab 320k -ac 2 win2.mp3

You need to specify filter or filter-complex and you dont need input pad because it is default and understood.

Also, note that here you are not really "turning it to mp3 and then converting to two different qualities". You are encoding into mp3 into 2 different qualities.

Answer 2

Split shouldn't be required.

Use

ffmpeg -i myaudiofile.wav \
-map 0:a -acodec libmp3lame -ar 48000 -ab 192k -ac 2 win1.mp3 \
-map 0:a -acodec libmp3lame -ar 48000 -ab 320k -ac 2 win2.mp3