Construct a CodedDesc from an AVCodec and an AVCodecContext.

Can set the profile of an InputStream.

* Add class ParamSet in common file.
* Remove set functions in CodedDesc.
* Update setProfile of:
     * IntputVideo.
     * OutputVideo.
     * OutputAudio.

Can set a profile of the output (a format profile).

* Allocate AVFormatContext in OuputFile's constructor (before the
setup).
* Reason: if setProfile before setup, the AVFormatContext is NULL and so
wa can set no format options.

To enable debug mode (breakpoints...).

Can set a profile of the input (a format profile).

Get the format name from the given filename.

Check match between a format name and a filename.

Get existing format profiles.

* avProfileFormat is necessary in a format profileDesc.
* Update _outputFormat depending on avProfileFormat in the profile.