## AAC-LD and AAC-ELD

Codec | Rate | QuickTime | ffmpeg | VLC
------|------|-----------|--------|----
AAC-LD  | 8000  | yes | no  | no
AAC-LD  | 16000 | yes | no  | no
AAC-LD  | 22050 | yes | yes | no
AAC-LD  | 24000 | yes | yes | no
AAC-LD  | 32000 | yes | yes | no
AAC-ELD | 8000  | yes | no  | no
AAC-ELD | 16000 | yes | no  | no
AAC-ELD | 22050 | yes | yes | yes
AAC-ELD | 24000 | yes | yes | yes
AAC-ELD | 32000 | yes | yes | yes

## Useful links

- [4.6.20 Enhanced Low Delay Codec](https://csclub.uwaterloo.ca/~ehashman/ISO14496-3-2009.pdf)
- https://stackoverflow.com/questions/40014508/aac-adts-for-aacobject-eld-packets
- https://code.videolan.org/videolan/vlc/-/blob/master/modules/packetizer/mpeg4audio.c