[FFmpeg-user] bounty: fix this bug #437 $150

[Roger Pack]

> It's not really a bug, it's an unknowable fact about the input and output
> video. The only way to fix it is to ask the user what they think the input
> is and what the output should be.

I suppose it just seems odd that, given a "known" full swing RGB
bitmap, ffplay is unable to display it in full swing (since it has
control of the conversions from beginning to end).