[FFmpeg-user] pipe from /dev/video to /dev/video adding a delay - syncing issues

Nicolas George george at nsup.org
Thu Jun 27 12:23:10 EEST 2019

Javier Infante Porro (12019-06-27):
> > For a regular countdown, you need an accurate timestamp. You are killing
> > your timestamps with the setpts filter: why do you do it?
> I am not using it anymore... it's something i forgot inside the filter chain...

That does not answer the question about why you put it in the first

> Right now i am using the -re switch (as Moritz suggest me in this thread),

That was a mistake. Devices already are timed.

> I am guessing it has sometyhing to do with the "-ts  parameter on the v4l2 input

You did not set the -ts option on the v4l input. If you want efficient
help here, you need to be very careful when showing your command lines.

> or maybe using the pts filter... but i am out of luck so far.

As I told you, no setpts filter, you are killing the timestamps you


  Nicolas George
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