[V4L] Xvideo and resolution

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Xawtv seems to use 384x288 (I thought it is the size form app-defaults, but
isnt) for Xvideo overlay regardless of the window size, which results in
blocky image when maximizing the window. Also it doesnt probably choose the
best YUV format - TNT2 offers those:
  image format list for port 39
    0x32595559 (YUY2) packed
    0x32315659 (YV12) planar
    0x59565955 (UYVY) packed

With bttv2 driver xawtv segfaults (may send strace log) when in grabdisplay
mode (doesnt matter if xvideo or normal) and changing window size.

-- 
Marian Jančár <mjanx123@xxxxxxxxxxxxxxxxxxxxxxxx>





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