brew/Library/Homebrew/test/fixtures/test.m4a, branch 1.0.9 🍺 The missing package manager for macOS fixtures: add test.m4a 2016-09-26T13:07:24+00:00 Zhiming Wang 2016-09-26T13:07:24+00:00 b6f983120a785fd9092b7ae050e364b52d28499c test.m4a contains an AAC LC stream inside an M4A (MPEG-4 Part 14) container. It is generated by FFmpeg 3.1.3 from test.wav: ffmpeg -y -i test.wav -c:a aac -profile:a aac_low -b:a 32k test.m4a test.m4a facilitates testing utilities or libraries that work with the AAC codec or the M4A container, e.g., alac. 
test.m4a contains an AAC LC stream inside an M4A (MPEG-4 Part 14)
container. It is generated by FFmpeg 3.1.3 from test.wav:

    ffmpeg -y -i test.wav -c:a aac -profile:a aac_low -b:a 32k test.m4a

test.m4a facilitates testing utilities or libraries that work with the
AAC codec or the M4A container, e.g., alac.