reuse av_guess_sample_aspect_ratio() if available in ffmpeg

Found via `codespell`

- cmake dependencies search (WITH_MFX option)
- raw H264, H265, MPEG2 encoding and decoding
- tests for supported formats

Usage:
    writer.set(cv::CAP_PROP_IMAGES_BASE + cv::IMWRITE_JPEG_QUALITY, 80);

- added CAP_PROP_XI_SENSOR_BOARD_TEMP parameter
- added acquisition resetting for paramters that require it

- fixed getProperty call definition
- added new parameter defitions

removed whitespaces

Reworked enumerators to keep values from previous commit

ximea enums fixes

- fixed whitespaces issue
- fixed duplicate enum values error

ximea enum definitions update

- fixed videioio.hpp code style
- fixed ABI violation in enums
- added new parameter handlers to cpp

XIMEA setProperty update

Added acquisition resetting to buffer size adjustment parameters.

also refactor property range handling and opencv property to V4L2
translation.

a separate function instead of an overload not to change the ABI.

rename VideoCapture paramter 'device' to 'index' in CPP to reflect that
it allows specifying the API.
update comments to explain how to specify the API.

Fixed errors in parallel_for based on pthreads

Fixing compiler errore & removing whitespaces

Fixing prallel_for_pthreads error and warnings on win

- fix compilation for old libraries
- update codec/tag selection logic
- add documentation note about MP4 container tags

Signed-off-by: Maxim Kostin <v-maxkos@microsoft.com>

added video writer quality, which user may change dynamically in the case of motion jpeg; enabled NEON intrinsics in the encoder

   (use "git reset HEAD <file>..." to unstage)

	modified:   modules/java/generator/gen_java.py
	modified:   modules/videoio/include/opencv2/videoio.hpp
	modified:   modules/videoio/include/opencv2/videoio/videoio_c.h
	modified:   modules/videoio/src/cap_dshow.cpp
	modified:   modules/videoio/src/cap_pvapi.cpp

Following changes have been made:
1. Some minor bugs have been removed.
2. In the PvAPI module the option CAP_PROP_MONOCROME has been removed because
   this option does not make sense and causes an error if a color camera is used.
3. Instead the new option CAP_PROP_PVAPI_PIXELFORMAT has been added which allows
   to activate the different pixel formats (color modes) of an AVT camera.
4. Since there were two identical defines
   CAP_PROP_MONOCROME = 19
   CAP_PROP_MONOCHROME = 19
   which were also used in the other module DSHOW, the first one with an orthographic
   error has been removed in favor of the second one.

Implement VideoCapture::get, CvCapture::getProperty, IVideoCapture::getProperty as constant methods.

sensors which do not have image generators.