Audio data rate:

up to 160 kilobits per second

Audio sampling rate:

22 kHz mono, 44 kHz stereo

Audio channels:

mono if simply speech, otherwise stereo

Video frame rate:

24-30 frames per second

Video frame size:

320×240 to 480×360 pixels (for 4:3 aspect ratio)

320×180 to 480×270 pixels (for 16:9 aspect ratio)

Video data rate:

up to 1000 kilobits per second

Audio compression type:

Advanced Audio Coding (AAC)

Video compression type:

H.264 (or MPEG-4 Advanced Video Coding)

Container file format:

MP4 or MOV