[FFmpeg-devel] [PATCH v2 1/2] avformat: add AVFormatContext.first_pkt_wallclock

[Andreas Rheinhardt]

Gyan Doshi:
> 
> 
> On 2022-06-28 10:43 am, Anton Khirnov wrote:
>> Quoting Gyan Doshi (2022-06-25 10:29:50)
>>> Stores wallclock time for the first packet received.
>>> Used for crude sync offset among inputs.
>>> ---
>>>   doc/APIchanges         |  3 +++
>>>   libavformat/avformat.h | 10 ++++++++++
>>>   libavformat/demux.c    |  3 +++
>>>   libavformat/options.c  |  1 +
>>>   libavformat/version.h  |  2 +-
>>>   5 files changed, 18 insertions(+), 1 deletion(-)
>> Why should this be in the library? Seems to me this can be just as
>> easily done by the callers who need it.
> 
> To not add some extra latency,  just like how
> `use_wallclock_as_timestamps` was implemented inside lavf.
> 

Why don't you use use_wallclock_as_timestamps and offset the timestamps
by the lowest returned timestamp?

- Andreas