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Video encoding - maemo.org wiki
http://wiki.maemo.org/Video_encoding
Video data rate and resolution is limited to about 800 kbps and 400x240 pixels (352x288 on the 770). Audio must be at 44.1 kHz or lower (performance drops dramatically with 48 kHz audio). It does not support external subtitles, so they must be hardcoded. DivXs need a FOURCC of "DIVX" rather than "DX50". Audio Encoding Standard Audio Codecs
Advanced Audio Coding - VideoLAN Wiki
https://wiki.videolan.org/Advanced_Audio_Coding/
Wikipedia has information on this entry: HE-AAC. High Efficiency AAC (aka aacPlus ), is a lossy data compression scheme for audio streams, and is part of the MPEG-4 Part 3 specification. HE-AAC combines Advanced Audio Coding (AAC) with spectral band replication (SBR)
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