[FFmpeg-user] Restream live rtmp with delay

[rslovers at yandex.com]

On Mon, Sep 19, 2016 at 07:10:38PM +0300, Maxim Kozlov wrote:
> Hi.
> 
> I need to transcode live rtmp stream with delay.
> I have no problem with encoding, but i confused how to delay.
> I found the adelay filter, but it works with audio.
> Is there any filter to delay video stream?

a simple solution when the bitrate is a constant, write a trivial program that
caches stdin to bitrate * delay-seconds bits before writing anything out.

   ffmpeg -i rtmp ... - | cache-stdin | ffmpeg -i - ...