AAC is also patented in itself , so users of MP4 will have to license both H. 264 and AAC .
H. 264 is usually used in the MP4 container format , together with Advanced Audio Coding ( AAC ) audio .
AAC is also patented in itself , so users of MP4 will have to license both H. 264 and AAC .
H. 264 is usually used in the MP4 container format , together with Advanced Audio Coding ( AAC ) audio .