[FFmpeg-devel] [PATCH]doc: Improve fieldmatch documentation

[Carl Eugen Hoyos]

Nicholas Robbins <nickrobbins-at-yahoo.com <at> ffmpeg.org> writes:

> >>  You are using dejudder & fps to produce a stream of 
> >>  frames lies ABCDDEFGHH... then decimate drops the 
> >>  dups. Seems brutal. 
> > 
> > Why / how?
> 
> It just seems strange to me to make those extra frames 
> just to throw them away. Seems mean to the frames I
> guess. But, if it works..

The original (24fps) stream has:
A   B   C   D   E   F   G   H   I

The telecined (30fps) stream has:
A/A B/B B/C C/D D/D E/E F/F F/G G/H H/H I/I

Fieldmatch produces this (or something very similar):
A/A B/B C/C D/D D/D E/E F/F G/G H/H H/H I/I
(it will not drop a frame, it will output one frame 
for each input frame from the telecined stream)

If you don't use decimate, you will get output 
different from the original stream, with decimate, 
you (hopefully!) get:
A   B   C   D   E   F   G   H   I

I pushed the documentation update assuming you 
are a native speaker...

Thank you, Carl Eugen