[Live-devel] How to get the qFactor?

[mean while]

hello,
    I'm using livemedia to stream mjpeg, and I don't know how to get the
qFactor value. Could you please tell me how to calculate the qFactor? Can I
found it from the jpeg content? And another question, the rtp type field
should be 1 if the jpeg is yuv422 format, and 0 if yuv420, is this right?
   Thank you and best reguards.
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