The following parameters are only for recommendation.
These parameters always slip off my mind.
Video chatting(QCIF)
MPEG-4 Simple Profile, Level 0 (1object allowed at maximum). (up to 4-object allowed in Level1 (up to QCIF), 2 and 3(up to CIF))
H.263 Baseline Profile + I,J,K,T, Level 10.
Stream media / Mobile TV (up to CIF)
H.264 Baseline Profile, Level 1.2.
reference on MPEG-4 visual profiles and levels