• Calvin Walton's avatar
    Add Win32 GDI-based screen grabbing · 08909fb5
    Calvin Walton authored
    Based on original code by Christophe Gisquet in 2010, updated to work
    with current ffmpeg APIs.
    
    Supports grabbing a single window or an area of the screen, including
    support for multiple monitors (Windows does funky stuff with negative
    coordinates here).
    
    I've moved most of the configuration to AVOptions; the input file name
    is now only the string "desktop", or "title=<windowname>" to select a
    single window. The AVOptions are the same as x11grab where possible.
    
    Code has been added to support a "show_region" mode, like x11grab, which
    will draw a rectangle on the screen around the area being captured.
    
    Instead of duplicating code for paletted image handling, I make use of
    the GDI API's ability to output DIB (BMP) images, which can be run
    through ffmpeg's existing BMP decoder.
    Signed-off-by: 's avatarCalvin Walton <calvin.walton@kepstin.ca>
    Signed-off-by: 's avatarMichael Niedermayer <michaelni@gmx.at>
    08909fb5
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