Re: [FFmpeg-devel] [PATCH] avfilter: port qp filter from libmpcodecs

On 9/19/2013 12:57 AM, Paul B Mahol wrote:

+@table @option +@item qp +Set expression for quantization parameter. +@end table + +The expression is evaluated through the eval API and can contain, among others, +the following constants:

This doesn't really make clear what it does of why it's useful... - Derek