Try to use video-filter instead of vout-filter for deinterlacing.
It only works for blend and X mode but there are probably the most used. When blend/X are enabled/disabled: - It avoids recreating the vout. - It avoids deinterlacing the (soft) subtitles. The other modes are not possible without a lot of vout works, so it is postponed for later. As a side effect, the initial value of the menu now takes into account the command line options. Please, report any regression. This code is made complicated by the vout filter/video filter2 switches&tricks.
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