Description of the issue

(container format) (container element) (container field) (container value) does not permit that the usacElementType sequence starts with SCE CPE


Best practice


ISO IEC 14496-1 (MPEG-4 Systems):
audioProfileLevelIndication: SCE CPE with xHE-AAC profile is not explicitly forbidden but common sense, due to computing power needed for decoding the third channel with a profile limited to 2 channels, it will likely lead to playback issues with a lot of players

Possible solution/action

ISO IEC 14496-1:
Fix the encoder to avoid a CPE for the second and third channels, then reencode the content.