AVOption are checked right after found in config file.
It allows to report exact line in config file.
Options provided more than once are threated as errors.
It also fixes flag options handing.
Flags may occur more than once in config file.
Signed-off-by: Lukasz Marek <lukasz.m.luki2@gmail.com>
So far AVCodecContext was created without codec specified.
This causes internal data to not be initialized to defaults.
This commit postpone context creation until all information is gathered.
Partially fixes#1275
This commit doesn't change any existing logic.
It moves ffserver configuration related code to separate file.
It intends to make maintaining easier.
Signed-off-by: Lukasz Marek <lukasz.m.luki2@gmail.com>
