[issue2158] scaling video while maintaining aspect ratio using -vf 'scale=-1:320' errors stating must be multiple of 2

[loopy123]

loopy123 <bob.hav...@gmail.com> added the comment:

Oops, there was a copy paste error in the original (in the calc of "w" - 
after the plus sign)

Corrected:


    if (w == -1)
        w = av_rescale(h, inlink->w, inlink->h) + ( av_rescale(h, 
inlink->w, inlink->h) % 2 );
    if (h == -1)
        h = av_rescale(w, inlink->h, inlink->w) + ( av_rescale(w, 
inlink->h, inlink->w) % 2 );

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