[FFmpeg-user] ffplay pipe output to ffmpeg (Windows)

[Tom Evans]

On Tue, Oct 8, 2013 at 10:02 PM, Jason Runta <jrunta at gmail.com> wrote:
> I'm trying to get a preview of my webcam BEFORE doing an encode pass on it.
> So I thought, 'why can't I just pipe the output from ffplay to ffmpeg'?
>

Because ffplay is a program that only displays media, and so it does
not produce a stream of that media that could be passed via a pipe to
ffmpeg to encode. In fact, ffplay produces no output on stdout at all,
and only information on stderr.

Cheers

Tom