[FFmpeg-devel] [PATCH 1/2] avdevice/decklink: addition of copyts option

[Carl Eugen Hoyos]

2018-01-20 19:50 GMT+01:00 Marton Balint <cus at passwd.hu>:
>
> On Sat, 20 Jan 2018, Carl Eugen Hoyos wrote:
>
>> 2018-01-08 6:26 GMT+01:00  <vdixit at akamai.com>:
>>
>>> + at item decklink_copyts
>>> +If set to @option{true}, timestamps are forwarded as they are without
>>> removing
>>> +the initial offset.
>>> +Defaults to @option{false}.
>>
>>
>> Why is the offset ever removed?
>> I believe this is not done for any other demuxer or is it?
>
> The code keeps track separate audio and video initial offset

But they can't be independent or can they?
And if they can, how is A/V sync assured?

I am just surprised because I don't remember another
device input that removes the time offset on initialization
and demuxers like mpegts don't do it either.

Carl Eugen