OutputFile: fix free avcodec_close

All codecs of library are closed in ICodec class.
Avoid double free of avcodec after a copy of an ICodec for example.
pyTest testTranscoderRewrap: update output format

The input file will be an AVI.
pyTest testTranscoderTranscode: comment video profile tests

Apply tests by iterations, not everything in one shot...
pyTest testTranscoderRewrap: update testRewrapVideoStream

* Can't access Rational objects in binding without create getters in
API... Need to find a solution.
* Apply tests by iterations, not everything in one shot...