[FFmpeg-devel] Inconsistent handling of initial_padding and PTS adjustment

[Kieran Kunhya]

On Mon, 27 Jul 2020 at 11:09, Anton Khirnov <anton at khirnov.net> wrote:

> Quoting Kieran Kunhya (2020-07-26 01:51:22)
> > Hi,
> >
> > I notice that some encoders adjust the PTS with initial_padding and some
> > don't.
> > Is this intentional and should we decide that all encoders should do
> this?
>
> Which ones don't?
>

A few here:
https://github.com/FFmpeg/FFmpeg/search?p=1&q=initial_padding&unscoped_q=initial_padding


> I don't think this is a matter of opinion really - if encoder adds
> padding and doesn't adjust the timestamps then the output timestamps are
> just plain wrong.
>

Well some containers have a flag for it. Right now if you encoded with
libopus into mkv or ts you get the PTS offset as well as the syntax element
written to the bitstream.

Kieran