Changelog :
* The "tmpgenc" quant. matrices are now the defaults.
* Fixed some audio track selection problems.
* Use ffmpeg instead of transcode for input framerate detection.
* Added new experimental "cvd_wide" output type.
* The script is a bit more verbose than before, it prints (egtools) some info about input and output streams.
* Reduced dependency to the transcode binary, now only needed for
detection of the pixel aspect ratio, and the length of streams.
